Is Atrial Fibrillation Dangerous? Symptoms, Prevention, & Barry Manilow’s Heart





Barry Manilow has written many songs about young lovers, star-crossed or not, with butterflies in their stomachs and hearts a-flutter. When they first meet, they swoon, and their hearts skip a beat. Listening to these songs and remembering your own loves, so does yours.

But when the famous pop music singer-songwriter’s own heart skipped a beat in 1996, it wasn’t a laughing matter.

After all, although Manilow, then 54, still showed no signs of slowing down and continued to sell millions of albums and perform in hundreds of concerts every year, he was beyond the prime of his life. He was at the age when most people begin to feel the aches and pains of diseases that are bound to develop from the wear and tear of daily life.

“I was driving home and I felt my heart skip a beat. Well, your heart skipping a beat doesn’t sound like it’s anything serious, so I didn’t pay much attention to it. And then it went blump-bla-bla-blump,” Manilow told CBSNews in October 2011. “And it got crazier and crazier, I felt like there was a fish flopping around in my chest.”

“I called my doctor and said ‘What is this?’ He said ‘Come on in,’ and he knew exactly what it was. It was atrial fibrillation,” Manilow says, he added. “I think it did scare me half to death because, you know, ‘Really my heart, there’s something wrong with my heart?’ But he said not to worry about (it), ‘It’s really good that you called us because that’s what you’ve got to do.’”

What is atrial fibrillation?
Atrial Fibrillation (AF) or A-fib occurs when the heart’s upper chambers faster than the lower chambers, causing an irregular, racing heartbeat.


Mostly an ailment of people over 50 years old, AF affects about 2.2 million people in the United States and 4.5 million in the European Union, and the number is rising in developed countries — but mainly because a higher quality of life is helping people live longer and the proportion of elderly is growing.

While it’s a manageable condition, A-fib can be dangerous because it can cause blood to pool in the heart’s upper chamber, the atria, and when this happens, a blood clot can form, break off and travel to the brain, causing a stroke. Strokes from AF account for almost one fourth of all ischemic strokes, heart doctors say.

AF also makes the heart work harder, with the ventricles beating very fast but unable to completely fill with blood. When the heart can’t pump enough blood to meet the body’s needs, heart failure occurs.

“Stroke and heart failure are the two major complications of AF,” says Dr. Holly Phillips, Prevention magazine Contributing Editor, in an interview on CBS News’ Early Show about the heart condition Manilow and so many others have.

People who have AF may not feel symptoms. But when A-fib isn’t noticed, it can increase the risk of stroke, and in some people, AF can cause heart failure when the heart rhythm is very rapid.

“This is why early diagnosis is key,” says Dr. Phillips.

If you are over 50 and have some major risk factors such as congenital heart defects, rheumatic heart disease, coronary heart disease (CHD) and other heart ailments, lung disease or hyperthyroidism and are obese or diabetic or have metabolic syndrome, it’s best to monitor yourself for the symptoms of A-fib:

  • Palpitations (feelings that your heart is skipping a beat, fluttering, or beating too hard or fast)
  • Shortness of breath
  • Weakness or problems exercising
  • Chest pain
  • Dizziness or fainting
  • Fatigue (tiredness)
  • Confusion

Fatigue and shortness of breath are common symptoms of heart failure, caused by a buildup of fluid in the lungs. Edema or fluid building up in the feet, ankles and legs can also be a sign of heart failure.

Monitor yourself particularly if you are a man, as men are more likely than women to have AF. In the U.S., AF is more common among whites than African-Americans or Hispanic Americans.

The risk of AF also increases as you age. Inflammation also is thought to play a role in causing AF. Sometimes, the cause of AF is unknown.

If you suffer from the above symptoms, it’s best to see a doctor who will put you through a series of diagnostic tests:

  • EKG or electrocardiogram
  • ECG or achocardiography
  • Stress test
  • Transesophageal Echocardiography
  • Chest X-ray
  • Blood tests

The heart’s rhythms
Because it supplies blood and oxygen to all body parts, the heart is the most important organ, next to the brain. An electrical system controls the heartbeat’s rate and rhythm, which in turn cause the heart to contract and pump blood.


With each heartbeat, an electrical signal spreads from the top of the heart to the bottom, beginning in a group of cells called the sinus node or sinoatrial (SA) node. In healthy people at rest, the heart’s SA node sends an electrical signal to begin a new heartbeat 60 to 100 times a minute.

From the SA node, electrical signal travels through the right and left atria, causing these to contract and pump blood into the ventricles, the heart’s large chambers.

The electrical signal then travels down to the atrioventricular (AV) node, the group of cells found between the atria and the ventricles. Here, the signal slows down slightly, allowing the ventricles time to finish filling with blood.

The electrical signal then leaves the AV node and travels to the ventricles, causing these to contract and pump blood to the lungs and the rest of the body. The ventricles then relax, and the heartbeat process starts all over again in the SA node.

Atrial Fibrillation
“Damage to the heart’s electrical system causes atrial fibrillation,” Dr. Phillips explains. Often, the damage stems from other conditions that affect the heart, such as high blood pressure and coronary heart disease.

In A-fib, the heart’s electrical signals don’t begin in the SA node but in another part of the atria or in the nearby pulmonary veins. Signals don’t travel normally and may spread throughout the atria in a rapid, disorganized way, causing the atria to “fibrillate” or contract rapidly and irregularly.

Faulty signals also flood the AV node with electrical impulses, causing the ventricles to beat very fast. But even though the ventricles are beating faster than normal, the AV node can’t send the signals to the ventricles as fast as they arrive so they aren’t beating as fast as the atria.

At this point, the atria and ventricles no longer beat in a coordinated way—creating a fast and irregular heart rhythm. In AF, the ventricles may beat 100 to 175 times a minute, in contrast to the normal rate of 60 to 100 beats a minute.

“When this happens, blood isn’t pumped into the ventricles as well as it should be,” says Dr. Phillips. “The amount of blood pumped out of the ventricles to the body is also irregular, based on the random atrial beats—and the body may get rapid, small amounts of blood and then larger amounts of blood,” says Dr. Phillips.

Treatment
According to the U.S. National Heart Lung and Blood Institute (NHLBI), AF may happen rarely or every now and then, or it may become an ongoing or long-term heart problem that lasts for years.

AF may be brief, with symptoms that come and go and end on their own. Or, the condition may be ongoing and require treatment. Sometimes AF is permanent, and medicines or other treatments can’t restore a normal heart rhythm.

In general, people who have AF but don’t have symptoms or related heart problems may not need treatment.

For those who have A-fib for the first time, doctors may choose to use an electrical procedure or medicine to restore a normal heart rhythm, says Dr. Phillips. “This is the ‘paddles’ described by Manilow – an electrocardioversion defibrillator to shock the heart back to its normal rhythm,” she explains.

But repeat episodes of AF tends to cause changes to the heart’s electrical system, heart doctors say, leading to persistent or permanent AF. So most people who have persistent or permanent AF need treatment to control their heart rate and prevent complications.

According to doctors, this is why the goals of treating AF involve:

  • Clot prevention. Preventing blood clots from forming lowers the risk of stroke. This is done by giving AF patients blood thinners like warfarin (Coumadin), dabigatran, heparin and aspirin.
  • Rate control. Controlling how many times a minute the ventricles contract. This is important because it allows the ventricles enough time to fill with blood completely. When this approach is taken, the abnormal heart rhythm continues, but you feel better and have fewer symptoms. Medicines used to control the heart rate include beta-blockers (metoprolol and atenolol), calcium channel blockers (diltiazem and verapamil) and digitalis (digoxin), as well as several other drugs.
  • Rhythym control. Restoring a normal heart rhythm to allow the atria and ventricles to work together to pump blood to the body efficiently. Medicines used to control the heart rhythm include amiodarone, sotalol, flecainide, propafenone, dofetilide, and ibutilide. Sometimes older medicines—such as quinidine, procainamide, and disopyramide—are used.
  • Treating any underlying disorder that’s causing or raising the risk of AF like hyperthyroidism, high blood pressure or heart disease. Medications are prescribed to treat an overactive thyroid, lower high blood pressure, or manage high blood cholesterol.

Surgery is also an option, heart experts say.
According to the NHLBI, people who are already getting a surgery anyway for heart valve disease may want to consider what is called a maze surgery to treat AF. In this procedure, the surgeon makes small cuts or burns in the atria. These cuts or burns prevent the spread of disorganized electrical signals.

A catheter ablation may also be done by an electrophysiologist to restore a normal heart rhythm if medicines or electrocardioversion don’t work, the NHLBI says.

A wire is inserted through a vein in the leg or arm and threaded to the heart, and radio wave energy is sent through the wire to destroy abnormal tissue that may be disrupting the normal flow of electrical signals. This procedure, however, is still on clinical trial, the NHLBI cautions.

Can Atrial fibrillation be prevented?
Like many diseases, A-fib can be prevented. If you want to lower your chances of developing the deadly irregular heartbeat, you can:

  • Follow a heart healthy diet that’s low in saturated fat, trans fat, and cholesterol. A healthy diet includes a variety of whole grains, fruits, and vegetables daily.
  • Stop smoking or don’t smoke.
  • Be physically active.
  • Maintain a healthy weight.
  • Treat underlying causes by taking medications to address an overactive thyroid, lower high blood pressure, or manage high blood cholesterol.

AF is more common in people who have:

  • High blood pressure
  • Coronary heart disease (CHD)
  • Heart failure
  • Rheumatic heart disease
  • Structural heart defects, such as mitral valve prolapse
  • Pericarditis, a condition in which the membrane, or sac, around your heart is inflamed
  • Congenital heart defects
  • Sick sinus syndrome, a condition in which the heart’s electrical signals don’t fire properly and the heart rate slows down or switch back and forth between a slow rate and a fast rate

AF also is more common in people who are having heart attacks or who have just had surgery.

If you already have heart disease or other AF risk factors, work with your doctor to manage your condition. In addition to adopting the healthy habits above, which can help control heart disease, your doctor may advise you to:

  • Follow the DASH eating plan to help lower your blood pressure.
  • Keep your cholesterol and triglycerides at healthy levels with dietary changes and medicines (if prescribed).
  • Limit or avoid alcohol, caffeine and other stimulants
  • Control your blood sugar level if you have diabetes.
  • Get ongoing medical care and take your medicines as prescribed.

 

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