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Heart anatomy
 
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Atrial fibrillation and flutter

Alternative names:

auricular fibrillation

Symptoms:

Note: Symptoms may begin and/or stop suddenly.

Signs and tests:

Listening with a stethoscope (auscultation) of the heart shows a rapid or irregular rhythm. The pulse may feel rapid or irregular. The normal heart rate is 60 to 100, but in atrial fibrillation/flutter the heart rate may be 100 to 175. Blood pressure may be normal or low.

An ECG shows atrial fibrillation or atrial flutter. Continuous ambulatory cardiac monitoring--Holter monitor (24 hour test)-- may be necessary because the condition is often sporadic (sudden beginning and ending of episodes of the arrhythmia).

Tests to determine the cause may include:


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