Tachycardia is a condition that makes your heart beat more than 100 times per minute. There are three types of it:
Supraventricular. This happens when the electrical signals in the organ's upper chambers misfire and cause the heart rate to speed up. It beats so fast that it can’t fill with blood before it contracts. That reduces blood flow to the rest of your body.
This is a rapid heart rate that starts in your ticker's lower chambers. It happens when...
You may also need medication to treat the irregular heartbeat of AFib, by controlling the rate or the rhythm (or both) of your heart.
"If your heart rhythm is off but the rate isn't too fast, that isn't as much of a problem," says William Whang, MD, assistant professor of clinical medicine in cardiology at Columbia University Medical Center.
"But when the heart rate is over 100 beats per minute for very long, the bottom pumping chamber -- the ventricle -- can become weak," he says. This leads to a condition called cardiomyopathy, which puts you at greater risk for heart failure.
The two types of medication most commonly used to slow a racing heart are:
If you aren't bothered by symptoms, your doctor may decide that correcting your heart's rhythm may not be worth the side effects.
But some people with AFib do struggle daily with fatigue, shortness of breath, and dizziness. If you do, your doctor may recommend an anti-arrhythmic medication to steady your heartbeat and help ease those symptoms.
Some drugs slow down how fast electrical signals can travel in the heart muscle. These sodium channel blockers include flecainide (Tambocor) and propafenone (Rythmol). But people with coronary disease or any kind of heart failure can't use them, cautions John Wylie, MD, director of electrophysiology services for Massachusetts-based Caritas Christi Health Care.
And while it may help fix the rhythm in the top part of your heart, dofetilide might also cause life-threatening abnormal heartbeats in the bottom part of your heart, too. You'll start taking it in the hospital. That way, doctors and nurses can watch you carefully during the first few days, when most of these complications happen.
Most of the common anti-arrhythmic drugs work between 45% and 55% of the time, Wylie says.