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An arrhythmia is a problem with the rate or rhythm of your heartbeat. It means that your heart beats too quickly, too slowly, or with an irregular pattern. When the heart beats faster than normal, it is called tachycardia. When the heart beats too slowly, it is called bradycardia. The most common type of arrhythmia is atrial fibrillation, which causes an irregular and fast heart beat.

Many factors can affect your heart's rhythm, such as having had a heart attack, smoking, congenital heart defects, and stress. Some substances or medicines may also cause arrhythmias.

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Illustration of the heart
Results 1 - 10 of 1,208 for irregular heartbeat
  1. Arrhythmia (National Library of Medicine)  
    An arrhythmia is a problem with the rate or rhythm of your heartbeat. It means that your heart beats ... is called bradycardia. The most common type of arrhythmia is atrial fibrillation, which causes an irregular and ...
  2. ... JavaScript. Even Moderate Drinking Might Raise Odds for Irregular Heartbeat But the finding held true for wine and ... their odds for a potentially dangerous form of irregular heartbeat, a new study suggests. The study did not ...
  3. ... page, please enable JavaScript. More Americans Hospitalized for Irregular Heartbeat, Study Finds Most patients had several health problems, ... million hospitalizations for atrial fibrillation, which is an irregular heartbeat that can lead to stroke and other heart- ...
  4. ... and Simple Snoring VIDEO: If I Had - An Irregular Heartbeat and Was Diagnosed With Long QT Syndrome- Dr. ... to Home Page VIDEO: If I Had - An Irregular Heartbeat and Was Diagnosed With Long QT Syndrome- Dr. ...
  5. Heartbeat sensations; Irregular heartbeat; Palpitations; Heart pounding or racing ... not the sensations represent an abnormal heart rhythm ( arrhythmia ). The following conditions make you more likely to ...
  6. Propafenone is used to treat arrhythmia (irregular heartbeat) and to maintain a normal heart rate. Propafenone is in a class of medications called antiarrhythmics. It works by acting on the ...
  7. ... used to prevent certain types of life-threatening irregular heartbeats. Flecainide is in a class of medications called ... is surgically placed under the skin to control irregular heartbeats) and if you have or have ever had ...
  8. Common Tests for Arrhythmia (American Heart Association)  
    Common Tests for Arrhythmia Updated:Dec 7,2012 Several tests can help your doctor diagnose an arrhythmia ( View an animation of arrhythmia ). Identifying, ... the heart and its rhythm. Common Tests for Arrhythmia Electrocardiography (ECG or EKG) An arrhythmia is considered ...
  9. Children and Arrhythmia (American Heart Association)  
    ... beat faster. During sleep it slows down. An irregular heartbeat is an arrhythmia . The most common irregularity occurs ... to ask questions about specific medicines or activities. Arrhythmia • Home • About Arrhythmia • Why Arrhythmia Matters • Understand Your ...
  10. Devices for Arrhythmia (American Heart Association)  
    ... Blood Pressure Tools & Resources Stroke More Devices for Arrhythmia Updated:Jan 23,2013 In a medical emergency, ... Devices that may interfere with a pacemaker Printable Arrhythmia Information Sheets What is Arrhythmia? (PDF) What is ...
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