For a variety of reasons, something - such as a structural heart defect - causes the heart to beat out of control. This abnormal heart rhythm is known as ventricular fibrillation.

在这多种原因中，一些会导致心跳失常，比如结构性心脏缺陷，这种异常的心律被称作。

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Most cases of ventricular fibrillation are linked to some form of heart disease. Ventricular fibrillation is frequently triggered by a heart attack.

室颤通常是由心脏疾病引起的，比如心梗。

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In several studies, this test alerted doctors to over 90 percent of people with atrial fibrillation, as confirmed by heart monitoring.

在几项研究中，经心脏监测证实，这个测试让医生注意到，超过90%的人患有房颤。

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Fish oil capsules failed to prevent flare-ups of atrial fibrillation, a common heart rhythm problem, in a large study in 2010.

NPR: Study: Fish Oil Doesn't Help Prevent Heart Attacks

The results of the current trial, presented by Halperin at the annual scientific sessions of the American Heart Association, focused on patients with atrial fibrillation, a condition that increases the risk of stroke fivefold and afflicts 2 million Americans.

FORBES: Replacing Coumadin

Xarelto is already FDA-approved to reduce the risk of DVTs and PEs from occurring after knee or hip replacement surgery (July 2011), and to reduce the risk of stroke in people who have a type of abnormal heart rhythm called non-valvular atrial fibrillation (November 2011).

FORBES: Rivaroxaban Gains FDA Indications For The Treatment And Prevention Of DVT And PE