An arrhythmia is an irregular heart rhythm. An arrhythmia can occur with a normal heart rate or with fast or slow heart rates. Causes may include coronary artery disease, heart attack, heart surgery, blood imbalances, and more. There are many types of arrhythmias including atrial fibrillation and atrial flutter. Treatments include medications and lifestyle changes, cardioversion, pacemakers, ICDs, and surgery. Follow the links below to find WebMD's comprehensive coverage about how arrhythmia is caused, what it looks like, how to treat it, and much more.
Antiarrhythmics Drugs to Treat Heart Disease
WebMD explains how antiarrhythmic drugs can be used to help treat abnormal heart rhythms.
Fast Heart Rate-Topic Overview
A normal heart rate for a healthy adult is between 60 and 100 beats per minute. Heart rates of more than 100 beats per minute (tachycardia) can be caused by: Exercise or stress. This fast heart rate usually returns to normal range (60 to 100 beats per minute) with rest and relaxation. Illnesses that cause fever. When the cause of the fever goes away,the heart rate usually returns to normal. ...
Heart Rhythm Problems: Diary of Symptoms-Topic Overview
If your doctor thinks you might have a heart rhythm problem,he or she may ask you to keep a diary of symptoms. This information can help your doctor find out what type of rhythm problem you have. And if you have a rhythm problem,a symptom diary can help you keep track of your condition. You can then discuss your symptoms with your doctor at your next appointment. In your diary,include the ...
Types of Supraventricular Tachycardia-Topic Overview
Supraventricular tachycardia (SVT) is a fast heart rate that begins in the upper chambers of the heart (atria). With SVT,abnormal electrical connections in the heart cause it to beat too fast. There are many types of SVT. Each type causes the abnormal fast heart rate in a slightly different way. Treatment depends on the type of SVT and what is causing it,if known. Treatment might include ...
5 Heart Rate Myths Debunked
Myths and facts about heart rates, including what an erratic heart rate means and the link between your pulse and stress.
Atrial Fibrillation (AFib) Myths and Facts
Did you know? If you have AFib, you can drive, have sex, and even eat ice cream. Find out if what you think is true.
Medication to Control Your Heart's Rate and Rhythm
Different kinds of medication can treat the irregular heartbeat of AFib, by controlling the rate or the rhythm.
Slideshows & Images
Slideshow: Why Am I Having Heart Palpitations?
Why does your heart race or skip a beat? Learn what causes heart palpitations and when to see your doctor.
A Holter monitor is a type of ambulatory electrocardiogram (EKG or ECG). Ambulatory means that you are able to walk. This device can record the electrical activity of your heart while you move around to do your usual activities. You might wear it for 24 to 72 hours. The monitor is a lightweight, battery-operated tape recorder. You can wear it on a strap over your shoulder. Or you can wear it around your waist. The monitor is connected by wires to small metal discs (electrodes) taped to your chest.
Implantable cardioverter-defibrillator (ICD)
Image of an implantable cardioverter defibrillator (ICD); A doctor places an implantable cardioverter-defibrillator (also called an ICD) in the chest. The ICD has one or two wires called leads that connect to the heart through a vein. The ICD checks the heartbeat for an abnormal rhythm. If the ICD senses an abnormal heart rhythm,it sends out either electrical pulses or a shock to fix it. ...
Slideshow: A Visual Guide to Atrial Fibrillation
See inside a heart during atrial fibrillation. Pictures show the causes, tests, and treatments for this common heart rhythm problem through illustrations and photos.