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  2. Atrial flutter - Wikipedia

    en.wikipedia.org/wiki/Atrial_flutter

    However, atrial flutter is more resistant to correction with such medications than atrial fibrillation. [1] For example, although the class III antiarrhythmic agent ibutilide is an effective treatment for atrial flutter, rates of recurrence after treatment are quite high (70–90%). [1]

  3. Catheter ablation - Wikipedia

    en.wikipedia.org/wiki/Catheter_ablation

    After 12 months, participants receiving catheter ablation were more likely to be free of atrial fibrillation, and less likely to need cardioversion. However, the evidence quality ranged from moderate to very low [ 4 ] A 2006 study, including both paroxysmal and non-paroxysmal atrial fibrillation, found that the success rates are 28% for single ...

  4. First-degree atrioventricular block - Wikipedia

    en.wikipedia.org/wiki/First-degree_atrio...

    It was originally thought of as having a benign prognosis. In the Framingham Heart Study, however, the presence of a prolonged PR interval or first degree AV block doubled the risk of developing atrial fibrillation, tripled the risk of requiring an artificial pacemaker, and was associated with a small increase in mortality. This risk was ...

  5. Effective refractory period - Wikipedia

    en.wikipedia.org/wiki/Effective_refractory_period

    Effective refractory period in green. In electrocardiography, during a cardiac cycle, once an action potential is initiated, there is a period of time that a new action potential cannot be initiated. This is termed the effective refractory period (ERP) of the tissue.

  6. Cardioversion - Wikipedia

    en.wikipedia.org/wiki/Cardioversion

    Synchronized electrical cardioversion is used to treat hemodynamically unstable supraventricular (or narrow complex) tachycardias, including atrial fibrillation and atrial flutter. It is also used in the emergent treatment of wide complex tachycardias, including ventricular tachycardia, when a pulse is present.

  7. Atrial fibrillation - Wikipedia

    en.wikipedia.org/wiki/Atrial_fibrillation

    Atrial fibrillation (AF, AFib or A-fib) is an abnormal heart rhythm (arrhythmia) characterized by rapid and irregular beating of the atrial chambers of the heart. [ 11 ] [ 12 ] It often begins as short periods of abnormal beating , which become longer or continuous over time. [ 4 ]

  8. Supraventricular tachycardia - Wikipedia

    en.wikipedia.org/wiki/Supraventricular_tachycardia

    Atrial fibrillation: Irregular impulses reaching AV node, only some being transmitted. The following types of supraventricular tachycardias are more precisely classified by their specific site of origin. While each belongs to the broad classification of SVT, the specific term/diagnosis is preferred when possible: Sinoatrial origin: [23]

  9. Electrophysiology study - Wikipedia

    en.wikipedia.org/wiki/Electrophysiology_study

    An EP study is typically performed in an EP lab (a specialized cath lab). These are specially equipped operating rooms that usually contain: [3] an x-ray machine capable of acquiring live X-ray video images (a fluoroscope) equipment to record electrical signals from the heart; a stimulator to electrically excite the heart and control the heart rate