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Showing posts with label Atrial Fibrillation. Show all posts
Showing posts with label Atrial Fibrillation. Show all posts

Monday, 29 June 2015

CoQ10 shows protective effect in heart attack study

This issue of Life Extension Updatereports the outcome of experimental research which found a protective role for CoQ10 against damage caused by heart attack.


Life Extension Update
Tuesday, June 23, 2015. An article published online on March 20, 2015 in the International Journal of Physiology, Pathophysiology and Pharmacology reveals a benefit for pretreatment with coenzyme Q10 (CoQ10) in rats in which myocardial infarction (MI, or heart attack) was experimentally induced.
The study involved groups of rats that underwent sham surgery, no surgery, experimental MI alone, or experimental MI that followed a week of treatment with resveratrol, CoQ10 or both compounds. Infarct area, hemodynamic factors, inflammation and markers of oxidative stress were assessed 24 hours following the surgery.
Among animals that received CoQ10 alone or in combination with resveratrol, left ventricular infarct area was significantly reduced and left ventricular hemodynamic parameters were normalized. Serum brain natriuretic peptide, which can be elevated in heart failure, and markers of inflammation, including tumor necrosis factor-alpha (TNF-a) and interleukin-6 (IL-6), were also lower among animals pretreated with CoQ10. While thiobarbituric acid reactive substances (a byproduct of lipid peroxidation) were lower in CoQ10-treated animals, indicating decreased oxidative stress, the endogenous antioxidants superoxide dismutase (SOD) and glutathione peroxidase were found to have increased.
"The mechanism of the cardioprotective action of CoQ10 involved blocking exaggerated oxidative stress and inflammation post MI, resulting in normalized/optimized hemodynamics and reduced infarct area of the left ventricle," write Mahmoud Alkhateeb of King Khalid University and colleagues. "The mechanism of the cardioprotective action of CoQ10 involved blocking exaggerated oxidative stress and inflammation post MI, resulting in normalized/optimized hemodynamics and reduced infarct area of the left ventri-cle," write authors Samy M. Eleawa and colleagues. "DNA damage to the heart following MI was likely also reduced with CoQ10, as supported by reduced Bax and p53 gene expression in the left ventricle."
"We propose that CoQ10 is an effective antioxidant/anti-inflammatory agent to combat against acute cardiac changes induced by MI and can be an attractive therapeutic option in patients undergoing cardiac changes post MI," they conclude.
 
What's Hot
CoQ10 may reduce Afib in heart failure patients
What's Hot 
 
An article appearing ahead of print on April 27, 2015 in the Journal of Investigative Medicine reports the outcome of a randomized trial of patients being treated for heart failure which found a benefit for coenzyme Q10 (CoQ10) in reducing atrial fibrillation, a common cardiac arrhythmia that occurs in up to 27% of heart failure patients.
The trial included 128 men and women treated for heart failure with ACE inhibitors, beta-blockers, statins and/or other drugs. Sixty-two subjects received 30 milligrams CoQ10 daily for one year. Twenty-four hour ambulatory electrocardiogram monitoring, echocardiography, and blood measurement of inflammatory markers and malondialdehyde (MDA, a marker of oxidative stress) were performed upon enrollment and at six and twelve months.
At the end of the trial, three participants who received CoQ10 and 12 members of the control group had experienced atrial fibrillation episodes. Malondialdehyde levels were reduced at 12 months in the CoQ10 group while remaining unchanged among untreated patients.
"There is an increasing body of evidence linking inflammation and oxidative stress to a broad spectrum of cardiovascular conditions, such as heart failure, coronary artery disease, and hypertension," write Quingyan Zhao, MD, PhD, and colleagues. "In addition, there are emerging data to support the association between inflammation and atrial fibrillation. This has created exciting potential opportunities to target inflammatory and oxidative stress processes for the prevention of atrial fibrillation and heart failure."
"The present study suggests that CoQ10 as adjuvant treatment attenuates the incidence of atrial fibrillation," they conclude. "The mechanisms of the effect perhaps have relation with the reduced levels of MDA."
http://www.lifeextension.com/Newsletter/2015/6/CoQ10-shows-protective-effect-in-heart-attack-study/Page-01?

This post is on Healthwise

Go to Healthwise for more articles

Sunday, 9 November 2014

Introducing the smart catheter for the heart

October 10, 2014

BY TOM AVRIL

This post is on Healthwise


Technological breakthrough: Dr Joshua M. Cooper, director of cardiac electrophysiology, looks to the large display next to the operating table to ensure that his catheters are going to the correct location in the heart. - MCT photos
Technological breakthrough: Dr Joshua M. Cooper, director of cardiac electrophysiology, looks to the large display next to the operating table to ensure that his catheters are going to the correct location in the heart. - MCT photos

Advances in technology are enabling doctors to tackle intricate surgery with better success.
Joshua M. Cooper inserted a catheter through a vein in Janice McKemey’s groin, up through her abdomen and all the way inside her heart.
From there, the physician pushed the slender device through a wall of tissue into the left atrium, where the hard part began.
Cooper’s delicate task: detect heart cells that had gone rogue and destroy them.
The procedure, called catheter ablation, has been around for decades, and with advances in technology it has become quite safe, especially in the hands of a skilled practitioner.
But with the condition Cooper was treating – a common type of abnormal rhythm called atrial fibrillation – it is not always effective. Symptoms such as palpitations, shortness of breath and fatigue may come back in 30% of cases.
Detail of x-ray image that Dr Cooper can look at as he places the force-sensing catheter in the patient's heart to begin the procedure.
Details of the X-ray image that he can look at as he places the force-sensing catheter in the patient's heart to begin the procedure.

That is why he was using a new kind of “smart” catheter – one that told him whether he was making good contact inside McKemey’s heart, thus delivering enough heat to ablate, or disable, any renegade cells that were triggering her erratic rhythms.
“It’s like the Goldilocks phenomenon,” said Cooper. “You want to give exactly the right amount of energy at each specific spot. Too little, and you lose effectiveness. Too much, and you could potentially damage an adjacent structure.”
Atrial fibrillation – “a-fib” – can be treated with medication in most people, but when ablation is needed, Cooper is a fan of working smart. The new catheter contains sophisticated electronics and is mounted on a spring, enabling it to measure just how much force is applied at each moment and at what angle.
Previously, physicians had to rely on X-rays and other images to try to tell whether the catheter was in firm contact with the inside of the heart.
The Food and Drug Administration approved these catheters in February. They are made by Biosense Webster Inc of Diamond Bar, California, a subsidiary of Johnson & Johnson.
A competing force-sensing catheter made by St Jude Medical Inc of St Paul, Minnesota, awaits approval.
Modern medicine is marked by a nearly relentless pace in technological advances, drawing fire from those who seek to curtail rising costs. And Cooper’s specialty, cardiac electrophysiology, is especially tech-driven.
But he and other physicians who use the smart catheters think they are a good bet for treating a-fib, likely to improve success rates while reducing time on the operating table. Biosense Webster declined to give an exact price for the devices, but Cooper said they cost about US$3,000 (RM9,600) – perhaps 5-10% more than the non-force-sensing variety.
The ultrasound catheter being inserted into one of the arteries in the groin area of the patient for access to the heart.
The ultrasound catheter being inserted into one of the arteries in the groin area of the patient for access to the heart.
Evidence so far suggests the devices will improve success rates, said Francis E. Marchlinski, director of electrophysiology for Penn Medicine, the University of Pennsylvania’s health system.
Marchlinski was senior author of a study of the devices published last month in theJournal Of The American College Of Cardiology and funded by Biosense Webster. He and his co-authors found 72.5% of patients who received ablation with the devices were free from symptoms 12 months later – a few percentage points higher than is typically quoted for procedures with regular catheters.
What’s more, physicians who consistently kept the catheters within the desired force range were four times more likely to be successful, the authors found.
David Frankel, a Penn colleague of Marchlinski’s  who was not involved in the study, said he had tried the catheters made by both companies and gave both a thumbs-up. He predicted success rates would reach 80% with practice.
“It’s a legitimate, legitimate improvement,” said Frankel, an assistant professor at Penn’s Perelman School of Medicine.
Among other recent advances is the use of “jet” ventilation, delivering rapid little bursts of air to the patient instead of longer, deeper breaths so the ribcage remains relatively stable – a big help when one is trying to make contact inside a beating heart.
Cooper’s performance of the procedure on McKemey this month illustrated the evolution of the technology. He first operated on McKemey more than a year before with a traditional catheter, attempting to wall off the region that was triggering her erratic rhythms, and had partial success.
But a year later, some of the rogue electrical signals were still getting through, so McKemey, a retired eighth-grade history teacher from Wyndmoor, returned for a re-do with the smart catheter.
Cooper’s Goldilocks target was to keep the amount of force between 10 and 40 grams (although technically, grams are a unit of mass).
As he deftly manoeuvred the device inside the patient’s atrium, numbers fluctuated in the 20s and low 30s on a computer screen, well within the desired range.
After about three hours, the ablation was over and McKemey, 65, was home the next day. She felt weak and nauseated at first, but is improving and optimistic.
“I think things are on the upswing now,” she said.

Months of observation will be needed to make sure. But for now, Cooper is confident the second ablation was a smart move. — The Philadelphia Inquirer/McClatchy-Tribune Information Services
http://www.thestar.com.my/Lifestyle/Health/2014/10/10/Introducing-the-smart-catheter-for-the-heart/

Go to Healthwise for more articles

Sunday, 22 June 2014

Aspirin can't help a million heart patients

Healthwise

Previous NHS advice is reversed as people with a common heart condition are told not to take aspirin to guard against stroke

More than than a million people with a common heart condition have been told not to take aspirin to guard against stroke, in a reversal of previous NHS advice.
New medical recommendations warn that the pills are ineffective in reducing the danger for those suffering heart rhythm disorders and that the risk of side-effects outweighs their benefits.
Up to 7,000 strokes and 2,000 premature deaths a year could be prevented if patients were put on new drugs instead, experts said.
Until now, adults suffering from atrial fibrillation have been advised to take a daily dose of aspirin – a blood thinning drug – as the heart condition often causes clots, leading to a risk of stroke that is five times higher than in other people.
But revised guidance from the National Institute of Health and Care (Nice) says a new generation of drugs is far better than aspirin at reducing the danger for such patients and is less likely to cause side effects including internal bleeding.
Patients are advised to seek advice from their GP before stopping their current medication, but the guidance recommends that anticoagulant drugs which prevent clots forming should be prescribed instead.
Several of the medications have only recently been recommended for NHS use, and medical advisers said thousands of lives could be saved if patients were switched to them. The advice recommends so-called “novel oral anticoagulants” including dabigatran etexilate and rivaroxaban as the best medication for those suffering from atrial fibrillation.
The condition becomes more common in later life, with one in 10 pensioners diagnosed with the disorder. It occurs when electrical impulses in the heart become jumbled, so that blood is pumped less effectively, increasing the chance of clots, which can cause strokes.
However, experts said aspirin remained the best drug for thousands of other patients, such as 1.5 million heart attack survivors, who are usually prescribed it alongside other medications, and for heart disease sufferers assessed with a high risk of stroke.
Prof Mark Baker, Nice’s director of clinical practice, called for significant changes in prescribing to save thousands of lives.
He said: “We know that around 7,000 strokes and 2,000 premature deaths could be avoided every year through effective detection and protection with anticoagulant drugs that prevent blood clots forming. Unfortunately only half of those who should be getting these drugs are.
“This needs to change if we are to reduce the numbers of people with AF who die needlessly or suffer life-changing disability as a result of avoidable strokes.”
Dr Campbell Cowan, chairman of Nice’s guideline development group, said: “Aspirin has been a bit of a smokescreen to anticoagulation. We now know it is not safer and it’s questionable whether it has any effect at all.” Nice said atrial fibrillation led to an estimated 12,500 strokes each year.
“Any stroke occurring in a patient with atrial fibrillation is a tragedy because it was preventable,” Dr Cowan said.
He said that patients with the heart problem should not take themselves off aspirin, but should make an appointment with their GP to find out which treatment is best for them.
The Nice guidelines, updated for the first time since 2006, suggest some patients with atrial fibrillation could still be given Warfarin, an earlier anti-coagulant. However, it suggests many patients will benefit from the new drugs, which need less monitoring and many of which have been introduced in this country since 2012.
Amy Thompson, senior cardiac nurse at the British Heart Foundation, said: “The new Nice guidelines reflect the growing body of evidence that warfarin and the newer anticoagulants are much more effective at preventing stroke than aspirin.
“But this does not mean aspirin is not an effective means of preventing heart attacks and strokes in other circumstances.”
The charity stressed that the advice from Nice relates specifically to the impact of aspirin on patients with atrial fibrillation, who have a high risk of clots within the heart, where anticoagulant drugs have been found to be more effective. Aspirin is still effective in reducing the risk of strokes from other causes, they stressed.
The drug is recommended by GPs for heart disease sufferers at high risk of stroke. However it is not usually advised for those assessed as low risk, because it can cause ulcers and bleeding.
The causes of atrial fibrillation are not fully understood.
The condition affects more men than women, becoming more common with age, and in those with other heart conditions such as high blood pressure or clogged arteries.
Most sufferers will have some symptoms ranging from palpitations to dizziness but as many as a third have no obvious signs of the condition, research for the new guidelines showed.

Thursday, 8 May 2014

These “Heart Pills” Can Increase Heart Disease Risk by 80%

April 20, 2014  

Colorful pills
They’re a fast and dirty “solution” to your inflammation problems. And you can find them just about anywhere—even gas stations. But there’s a problem. Besides the dangers we already know about.
New research shows they can raise atrial fibrillation (AF) risk by 80% in seniors.1 And talk about scary…
AF is the most common form of irregular heartbeat. It causes fast, chaotic electrical signals to shoot through the upper-chambers of your heart. AF leads to blood pooling in your atria. This means it isn’t reaching the lower chambers. The result is a heart divided: The upper part doesn’t know what the lower part is doing.
If you’re lucky, you may experience some chest pain. But it can also cause heart failure and stroke. To make matters worse, you may not ever notice the symptoms. You could even be stuck with AF for life if your heartbeat doesn’t respond to intervention.2
Unfortunately, this isn’t the first time we’ve told you how dangerous these drugs are to your heart. If you have a history of heart problems, these may raise your risk of death by 55%. But now Dutch researchers have discovered that even if you haven’t had a heart event in the past, you’re still at risk.
Not only that, but you don’t need to even be currently taking one of these drugs to be in danger. Within 30 days of use, your chances of developing AF could be 84% higher than someone who never takes one. Researchers found that it doesn’t matter what your blood pressure or cholesterol charts say. It doesn’t even matter if you smoke or not.
You might be relying on them every day…like 30 million other Americans. Or maybe you only use them once in a while. Whatever the case, one thing is certain: These pills can put your heart—and your life—in serious danger.
Of course, we’re talking about NSAIDs. And if you’re a Health Watch reader, it shouldn’t surprise you.
Most people with arthritis become slaves to these anti-inflammatory drugs. Yet few people realize the damage NSAIDs are doing to their body in the process. They just want the pain relief. And who can blame them?
But NSAIDs come with deadly side effects…and they’re not even one of the best ways to prevent arthritis pain.
Don’t rely on NSAIDs to protect your heart…or for pain relief. They can do way more harm than good. The right foods can help cut heart disease risk by up to 60%. Some can start defending your heart in just 30 days. You can also turn to natural anti-inflammatories like ginger and krill oil in place of toxic NSAIDs.
References:
1http://bmjopen.bmj.com/content/4/4/e004059.full
2https://www.nhlbi.nih.gov/health/health-topics/topics/af/
http://institutefornaturalhealing.com/2014/04/these-heart-pills-can-increase-heart-disease-risk-by-80/

Saturday, 9 November 2013

Life after stroke

29 October 2013

By Kasmiah Mustapha | kasmiah@nst.com.my                  

In conjunction with World Stroke Day today, two survivors tell Kasmiah Mustapha how they are coping




THEIR lives were turned upside down. From being independent and leading successful lives, two stroke survivors had to relearn everything from scratch.

It was a long and difficult journey for Alvin Tay, 52, and Shahrizan Jamaluddin, 57. Stroke had rendered half of their bodies paralysed and robbed them of the ability to speak coherently.

As a manager for an insurance agency, Tay’s hectic working life lead to a sedentary lifestyle. A diabetic for 20 years, he also has high blood pressure and borderline cholesterol. At the time of the attack, in June this year, he weighed 90kg.

When he experienced numbness on the right side of his body, his family members rushed him to a medical centre where he was diagnosed with multiple acute stroke, better known as influx. From his scan report, it was found that Tay had five clots in his left side of his brain. He couldn’t speak properly and was paralysed on the right side of his body, from head to toe.

Ten days after the attack, Tay was brought to the National Stroke Association Of Malaysia (Nasam) centre in a wheelchair. At that time, he could not even lift his head, which was tilted to the right. He was in tremendous pain. He had to use all his energy just to move his right arm.

“I was depressed when the doctor told me there was nothing that could be done. I thought my life was over and that I would be a burden to my family. But my wife, my strongest supporter, told me not to give up hope. She told me that I could get better,” says Tay.

“When I joined other stroke survivors at Nasam, I realised I needed to help myself so that I could get my life back because I was not alone. It helped to know that there were others who were in the same condition or even worse but they were not letting their disability hold them back.”

Tay became more diligent in his rehabilitation and even continued the exercises at home. He spent 70 per cent of his time on rehabilitation every day.

Through determination, he is now able to walk, albeit slowly. Although the right side of his body has not fully recovered, he has decided to work two to three hours a day just to keep in touch with-his business.

“As stroke survivors, I believe we can heal and get better one step at a time. It was difficult and tough at first. I couldn’t even lift my head and it was a Herculean task to lift my right hand. But with therapy and support from everyone, I was able to do it,” he says.

FOCUS ON REHABILITATION

An assistant manager in the marketing department of Universiti Kuala Lumpur, Shahrizan, was required to travel nationwide to promote the university. She was dealing with several health issues including diabetes, hypertension, high cholesterol and the narrowing of blood vessels.

In 2007, she suffered her first stroke. She had felt a twitching sensation on her left cheek and felt extremely tired . She knew something was wrong and asked a neighbour to send her to hospital. She was suffering from influx on the right side of her brain. After a few months of treatment, she was able to return to work but her movements were slow.

She had another stroke in 2009 due to her inconsistency in rehabilitation. That year, she had to quit her job. To make matters worse, she suffered a third stroke in July this year. Fortunately for her, the three strokes did not leave a major impact. Although her speech is a bit slow, she is still able to walk with the help of a cane.

Now, her focus is on continuing her rehabilitation at Nasam as she wants to be independent again. It is not easy as she can no longer drive and has to take the bus from her house in Telok Panglima Garang in Banting to Petaling Jaya. She also has to get someone to deliver food since, for safety reasons, she is not allowed to cook.

Recognise symptoms

President of the Malaysian Society for Neurosciences, Professor Dr Hamidon Basri, says it is important for people to recognise stroke symptoms as it is vital to seek immediate treatment. When stroke happens, the person has 10-15 per cent risk of dying. If they survive the attack, they will be living with permanent disability.

He says stroke is known as brain attack and it happens when the flow of blood to the brain is interrupted, either due to blockage by a clot or when a blood vessel bursts or ruptures. When a person suffers from stroke, time is of the essence because the longer you wait, more brain cells will die and the more severe the stroke will be.

“Stroke can happen suddenly. One minute you are talking, walking and doing your work. The next second, you may be stricken. You will suffer neurological symptoms such as face drooping, numbness in your arms and slurring of speech. These are the warning signs and you need to get admitted immediately.

“Stroke treatment is time sensitive. At 90 minutes the stroke is small, but grows bigger if nothing is being done after three hours and in 24 hours, almost half the brain is affected.”

MODIFIABLE FACTORS

Dr Hamidon says if the symptoms last less than 24 hours it is known as Transient Ischemic Attack (TIA) or a mini stroke. They need to seek medical attention immediately because after the mini stroke, they are at risk of a major attack.

He says there are four major risk factors for stroke that can be modified through healthy lifestyle — diabetes, hypertension, high cholesterol and smoking.

Hypertension is one of the
risk factors for stroke.
      
Controlling hypertension will lower the risk of stroke by 30 per cent, better managing cholesterol will reduce the risk by 28 per cent and with lower blood sugar level, 21 per cent. When people stop smoking, the risk is reduced by 50 per cent.

Dr Hamidon says there are about 15,000 to 20,000 new stroke cases a year in the country. There is a decreasing trend in stroke cases in developed countries because of better prevention, treatment and aftercare management. But in developing countries such as Malaysia, the trend is increasing and it is estimated that within the next 10 to 20 years, the number of new cases and survivors will increase significantly.
Physical activity reduces
 the risk of stroke. 

“The worry is stroke will become epidemic due to lack of awareness and prevention steps. If you have all the risks factors, you need to lead a healthy lifestyle with plenty of physical activity. Thirty minutes of daily physical activity will reduce the risk of stroke by 27 per cent,” he says, adding that a study done in Kuala Terengganu found that one reason why stroke patients delay seeking medical aid is the belief that the symptoms are minor and will go away.

Other reasons include seeking help from traditional healers as well as staying alone and waiting for someone to send them to hospital. In some areas, the hospitals are also not prepared to treat stroke patients.

STROKE AND AF

STROKE can happen when a blood clot in the heart travels to the brain and blocks the blood flow. The blood clot occurs in people with atrial fibrillation (AF), a condition that causes the heart to beat too fast, too slow or with an irregular rhythm.

National Heart Institute (IJN) consultant cardiologist and electrophysiologist Datuk Dr Razali Omar says the impact of a stroke will be more devastating for patients with AF. Once those with AF have a stroke, there is a 40 per cent chance they will get another stroke within a year.

He says: “AF can cause a massive stroke. And 91 per cent of stroke in AF is caused by blood clots that form in the left atrial appendage. The fibrillation causes blood to stagnate in the left atrial appendage of the heart. The stagnant blood becomes an ideal environment for a thrombus or blood clot to form. The blood clot, or a portion of it, dislodges from the left atrial appendage and travels through the arterial system to lodge itself in the blood vessels of the brain, restricting blood flow and causing a stroke.”

Dr Razali says people with AF are five times more at risk of stroke and they have a 70 per cent chance of death or permanent disability. AF patients have poorer survival rates and more recurrences of stroke during the first year of follow-up.

“However, three out of four AF-related strokes can be prevented with the appropriate use of anticoagulation therapy. With increased awareness as well as early diagnosis of AF, we hope to be able to minimise and even prevent AF-related strokes in the future,” he adds.

A four-week study of 1,435 acute medical admissions at Hospital Kuala Lumpur found that 40 patients had AF. Of these, two had stroke, one had a heart attack and 16 were diagnosed with heart failure.

AF risks increase with age and it is estimated that one in four people aged 40 and older will develop the condition. It is estimated that up to 15 per cent of all strokes are caused by AF.

SURVIVORS’ STRUGGLE

TO raise awareness on stroke and the struggle faced by the survivors, the National Stroke Association of Malaysia (Nasam) and Boehringer Ingelheim will screen a movie titled Against The Wind.

It’s about how stroke survivors struggle to overcome their disabilities.

In addition to living with permanent disability, they also have to deal with emotional and financial issues. Some of the survivors were abandoned by their spouses and had no one to take care of them.

Directed by Taiwanese director Wayne Peng, the movie was shot over three years and features eight stroke survivors and their families.

Nasam founder and director Janet Yeo says the movie shares the inspiring stories of the survivors and their agonising daily struggles as many are unaware of the issues that stroke survivors face.

“After a stroke, your whole life changes — emotionally, mentally and physically. When we look at a stroke survivor, we only look at the disabilities. Nobody knows how they feel and what happens at home.

When I had a stroke 25 years ago, I had to deal with numerous issues such as financial and marital. In the last 16 years since I started Nasam, I had met many survivors who had been abandoned by their spouses or children,” says Yeo.

“For a stroke survivor to recover and deal with their disabilities, they need family support. Otherwise, they will not be motivated to go for rehabilitation. Some of them will get depressed and this will affects their rehabilitation. Hopefully the movie will raise awareness about stroke and that prevention is the best strategy.”

Yeo says Nasam will host the screening to the public nationwide as well as in Singapore and Taiwan.

Tuesday, 3 September 2013

Yoga Helps Atrial Fibrillation


Blood Thinners for Atrial Fibrillation Patients?



September 2, 2013

A New Tool Shows Who Benefits...and Who Doesn’t

4180.jpgThere’s a common heart condition that can quadruple or even quintuple your risk of having an ischemic stroke, the type caused by a blood clot or other blockage. Called atrial fibrillation (AF), it’s a disorder that affects the heart’s rhythm. Blood can be left behind in the upper chambers of the heart during abnormal contractions…and that blood is prone to form a clot that might travel to the brain. To prevent strokes in AF patients, doctors often prescribe anticoagulant medication (blood thinners).

Anticoagulants are very effective at preventing blood clots, but they bring dangers of their own—namely, a greatly increased risk for major bleeding. For instance, users may develop gastrointestinal bleeding…or may experience a cerebral hemorrhage. That’s why blood-thinning drugs should be used only when their benefits clearly outweigh their risks.

Problem: It’s not easy to tell which AF patients are likely to have a stroke and thus do need anticoagulants…and which are unlikely to have a stroke and therefore should stay off the blood thinners.


Various sets of guidelines have been developed to help doctors and AF patients make the important yes-or-no decision about blood thinners—but these guidelines do only a mediocre job. As a result, many patients are misclassified as low risk, don’t get the blood thinners and wind up having strokes…while others are misclassified as high risk, take the blood thinners and end up with serious side effects from the drugs.

Good news: Researchers from Harvard, Kaiser Permanente Research in California and elsewhere have devised a new scoring system that more accurately predicts which AF patients should be on blood thinners—and which should not.

SETTLING ON A SCORE


An advantage the researchers had in devising the new risk assessment tool was their access to the database of one of the nation’s largest health-care plans, Kaiser Permanente. They found more than 13,500 patients with known AF, then tracked their medical records to look for use of the common anticoagulant warfarin (Coumadin)…and also for ischemic stroke or other thromboembolic events (conditions caused by blood clots), such as blockages to arteries in the legs.

The patients were followed for up to seven years or until they had a stroke or other thromboembolic event, left the health plan or died. Only their time off warfarin was considered, because this analysis wanted to determine the risk for stroke, which would potentially be avoided by the warfarin.

The researchers looked at conditions that affect stroke risk, then determined the individual amount of risk that each factor contributed. Based on the real-life data—meaning what really happened to actual patients who had the various risk factors—the researchers devised a scoring system called the ATRIAstroke score that doctors can use with their AF patients to gauge blood thinners’ benefits versus risks.

Scoring system: Risk factors that contribute one point each to the ATRIA score include having diabetes…high blood pressure…congestive heart failure…protein in the urine…poor kidney function…or being female (since female AF patients are at higher risk). In addition, up to nine more points are added based on the interplay between age and previous history of stroke. The points for different age groups ranged from zero to six for people without a previous stroke…and from seven to nine for people who have had a stroke. The math gets a little tricky, but here are two examples: A male younger than 65 with no other risk factors would get the minimum score of zero…a female of 85 who had suffered a previous stroke and had all the other risk factors would get the maximum ATRIA score of 15.

USING THE SYSTEM


Here’s how the scores are categorized in terms of risk for stroke or other thromboembolic event…

  • Zero to five—low risk of 0.9% or less per year. AF patients in this category are unlikely to benefit from taking blood thinners.
  • Six—moderate risk of 1% to 1.9% per year. Even though this category comprises just a single score, a goodly number of study participants did fall into this category. For AF patients with a score of six, the researchers tended to favor the use of blood thinners, though the benefits were less clear than for patients at higher risk. Here, patients’ preferences regarding the risk for stroke versus the risk and inconvenience of taking blood thinners need to be carefully weighed, the researchers noted.
  • Seven to 15—high risk of 2% or more per year. Anticoagulation therapy appears to provide a clear net benefit for AF patients in this category. Now, a 2% risk may not seem that much higher than the 0.9% or less risk that is deemed low—but since the risk is cumulative over time, that difference becomes more and more significant as the years pass. For instance, the five-year cumulative risk would be around 10% or more for people in this category.

Validating the results: After developing the ATRIA scoring system, the researchers tested its validity against another large database of AF patients (again from Kaiser Permanente, but this time drawing on data from different years and different regions). Then they compared the predictive powers of the ATRIA system against the older predictive systems—and found that the ATRIA scores did indeed more accurately reflect the odds that any given patient would experience a stroke when not taking a blood thinner.

If you have AF: Whether or not you are currently taking a blood thinner and whether or not you have ever had a stroke, ask your doctor to assess your stroke risk based on the ATRIA scoring system. If your score is low but your doctor still wants you to take a blood thinner—or if your score is high but your doctor has not prescribed a blood thinner—ask for an explanation. If you are not satisfied with that explanation, consider seeking a second opinion on whether anticoagulation therapy is a sensible choice for you. The scoring system is not meant to lock anyone into a decision, the researchers said, but rather to provide an informed way for AF patients and doctors to discuss the risks and benefits of anticoagulation therapy. Important: You and your doctor should review your decision periodically—because as you get older or as your medical condition changes, your ATRIA score changes, too.

Source: Daniel Singer, MD, professor of medicine, Harvard Medical School, and professor, Harvard School of Public Health, Boston. His study was published in Journal of the American Heart Association.

http://www.bottomlinepublications.com/content/article/health-a-healing/blood-thinners-for-atrial-fibrillation-patients-a-new-tool-shows-who-benefit-and-who-doesn-t?

Friday, 9 November 2012

Natural Treatments for Cardiac Arrhythmia

Daily Health News
 
September 18, 2008
 
Live a Long Life, Even with Cardiac Arrhythmia

Natural Treatments Can Help Control This Common Cardiac Condition

63.jpgDoes your heart occasionally flutter or skip a beat? Does it pound unusually fast or unusually slow? If so, you may have a cardiac arrhythmia, an irregular or abnormal heartbeat that indicates a malfunction in the heart’s electrical system. An arrhythmia may be no big deal—causing no symptoms, sometimes, and presenting no underlying damage or disease—or it could be a very big deal indeed, possibly leading to stroke or sudden cardiac death.
 
This, in fact, is what happened to political commentator Tim Russert in June. His death is believed to be the result of an arrhythmia caused by the rupture of plaque in his arteries. Especially in this election year, Russert was such a familiar face in American homes that many felt his loss personally—and also worried that they, too, might be vulnerable to such a fate. So it seemed a good time to share with you a bit more about heart arrhythmias, including an exploration of natural options for controlling this common problem. I spoke with two experts—cardiologist Jennifer E. Cummings, MD, director of electrophysiology research at the Cleveland Clinic and Michael Traub, ND, a naturopathic physician in Hawaii and former president of the American Association of Naturopathic Physicians. Both emphasized that anyone who experiences a cardiac arrhythmia should call their doctor and schedule an evaluation.
 

AT THE HEART OF THE MATTER

 
The causes for arrhythmia can range from important to insignificant. Cardiac arrhythmia may be triggered by serious, underlying heart disease…more controllable factors such as stress…medications…caffeine…or it may simply be a normal variant that will cause no symptoms or health problems and requires no treatment or lifestyle adjustment. The only way to find out is to work with your cardiologist and undergo medical tests.
 
Diagnostic tests for heart arrhythmia include a Holter monitor (where your heartbeat is measured over the course of the day as you go about your normal activities), an electrocardiogram (EKG), echocardiogram (heart ultrasound), stress test (a test that measures arrhythmias that are brought on by exercise or stress) or cardiac catheterization (threading a tube into the heart to visualize vessels).
 
There are several distinct kinds of arrhythmia—all potentially dangerous:
  • Atrial fibrillaton, a fast and irregular heartbeat that is associated with stroke and heart failure. This is the most common arrhythmia in people over 60.
  • Bradycardia, an abnormally slow rhythm that can cause fainting spells and, though only rarely, death.
  • Tachycardia, an abnormally fast heart rate that can also cause sudden death.

 

MAINSTREAM MEDICAL TREATMENTS

 
Mainstream medical treatments for arrhythmia include drugs, pacemakers and other interventions, surgical or non-surgical. According to Dr. Cummings, the treatment recommendation takes into consideration both the type of arrhythmia and the overall health of the patient. An electrophysiologist (a cardiologist who specializes in treating arrhythmia) can be helpful in exploring the pros and cons of the various treatment alternatives.
 
Here are some of the most common treatment options…
 
Antiarrhythmic drugs. Pharmaceutical drugs may be prescribed to block electrical impulses causing the arrhythmia. These work well but the dosage must be carefully monitored and controlled, since paradoxically this class of drugs has also shown an association with an increased risk for a different type of arrhythmia.
 
Anticoagulant or anti-platelet therapy. Blood-thinning drugs—primarily warfarin or aspirin—may be prescribed to prevent blood clots in people with atrial fibrillation or those at risk for stroke. But, notes Dr. Cummings, aspirin is not for everyone and these treatments are not interchangeable.
 
Calcium channel blockers and beta blockers. These drugs are prescribed to treat certain abnormal heart rhythms.
 
Pacemaker and implantable cardioverter-defibrillator (ICD) devices.If non-invasive treatment alternatives aren’t effective or appropriate, your doctor may advise implantation of a pacemaker (to regulate the heart beat) and/or an ICD (to deliver a shock when the rhythm is disrupted, in the hope this will reset the heart to beat more regularly). Typically, slow heart rhythms are treated with pacemakers, while rapid, high-risk ventricular heart rhythms are treated with ICDs.
 
Radio frequency ablation. A thin, flexible tube called an ablation catheter is threaded into the heart. Pulses of energy get sent through the catheter to the heart, locating and destroying small areas of tissue that are causing the arrhythmias. A similar treatment called cardiac catheter cryoablation accomplishes the same goal, using cold temperatures rather than heat.
 

THE NATURAL PATH TO CONTROLLING ARRHYTHMIA

 
Many people may be unaware of simpler tools like lifestyle change, dietary adjustments and natural supplements that may be effective for the treatment of arrhythmias. Dr. Traub told me that in his experience, naturopathic medicine can often be practiced in tandem with conventional medicine to bring an abnormal heartbeat under control.
 
The first thing to consider is whether making lifestyle changes or successfully controlling underlying conditions can make a difference. For example…
  • If you smoke, stop…but (especially if you are a long-timer) seek medical oversight, as your nicotine may need to be tapered.
  • Stimulants. If caffeine triggers symptoms, cut back on or eliminate products such as coffee, caffeinated soft drinks, tea, chocolate and anything that contains caffeine. You may need to ease back rather than stop suddenly.
  • Over-the-counter cough medicines with pseudo-epinephrine should be avoided, as this is a stimulant that can trigger arrhythmias.
  • Limit alcohol intake.
  • If you notice that abnormal heart rhythms are associated with specific activities (such as certain stressful family gatherings or particularly demanding exercises), avoid them…at least until you have figured out a way to tolerate such events without having an intense physiological reaction to them. Discuss this with your doctor.
  • If a medication appears to bring on symptoms, ask your physician if it is possible to prescribe an alternate drug.
  • Take steps to effectively manage stress. There are hundreds of ways to do this—yoga, meditation, exercise, getting a pet, changing jobs. Examine what is contributing stress to your life, and see what can help you better manage or even change it.

 

NATURAL SUPPLEMENTS FOR TREATING ARRHYTHMIA

 
Of course, lifestyle changes alone are not always sufficient to control arrhythmias. In more serious cases, Dr. Traub prescribes…
  • Fish oil. This rich source of omega-3 fatty acids is step one of Dr. Traub’s treatment protocol. Fish oil is a natural anticoagulant that reduces the risk of blood clots, which can be associated with arrhythmias. Caution: Fish oil should be taken with caution—and only under your physician’s careful supervision—particularly if you take blood-thinning drugs such as warfarin (Coumadin) or aspirin.
  • Nattokinase. This extract of the Japanese fermented soybean product natto inhibits development of blood clots. Use with caution—and under a doctor's supervision—if you take other blood thinners.
  • Magnesium and potassium. Magnesium and potassium deficiencies may lead to a higher risk of arrhythmias. If blood tests confirm a deficiency, your doctor may prescribe supplements to help restore normal blood levels and reduce arrhythmia risk or occurrence.
  • Other supplements. Additional supplements that have shown promise but require further research include Allium cepa and Allium sativum (onion and garlic), Atropa belladonna, Cinnamomum camphora, Cordyceps sinensis and Crataegus oxyacantha. Dr. Traub also points out that acetyl-L-carnitine is used in Europe to treat cardiac arrhythmias.

Cardiac arrhythmia is common—but that doesn’t mean it is safe to ignore it. If you experience even one episode of arrhythmia, call your doctor. You may find that it is nothing at all…or you may learn what you need to do to save your life.

Jennifer E. Cummings, MD, director of electrophysiology research and staff cardiologist, department of cardiovascular medicine, Section of Electrophysiology and Pacing, Cleveland Clinic, Cleveland, Ohio.

Source: Michael Traub, ND, director of the integrated health care center Ho‘o Lokahi in Kailua Kona, Hawaii. Dr. Traub has a part-time practice in Marin County, California and is currently an adjunct faculty member at National College of Natural Medicine, Southwest College of Naturopathic Medicine, University of Bridgeport and the University of Minnesota. He is the former president of the American Association of Naturopathic Physicians.
 
 

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Publication                                Daily Health News
Original publication date          September 18, 2008