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.
Abnormal Heart Rhythms (Arrhythmias)
WebMD explains arrythmias, or abnormal heart rhythms, including causes, symptoms, treatment, and more.
What Are Heart Rhythm Disorders (Arrhythmias)?
Learn the causes, symptoms, and types of arrhythmias, which are changes in your heart rhythm that can be brought on by things like stress, disease, or certain medications.
Flutter, thump, bump: facts about tachycardia
Tachycardia is a common, treatable condition that causes rapid heartbeat. Learn what causes your heart to beat too fast and how doctors diagnose and treat it.
Cardioversion for Atrial Fibrillation
Cardioversion is a medical procedure used to treat atrial fibrillation (AFib) and other types of irregular heartbeat, or arrhythmia. Learn about the difference between chemical and electrical cardioversion, how electrical cardioversion differs from defibrillation, possible risks, and recovery time.
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.
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
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.
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.
Slideshow: A Visual Guide to Heart Disease
WebMD provides a visual overview of heart disease, including symptoms to watch for, diagnostic tests, treatments, and prevention strategies.
Slideshow: 20 Foods That Can Save Your Heart
The top foods for heart health go beyond cholesterol busters to edamame, nuts, salmon, even coffee. Cooking tips and pictures show how to work new foods into your diet.