Cardiomyopathy electrocardiogram

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Electrocardiogram

• An EKG is a simple test that records the heart's electrical activity. The test shows how fast the heart is beating and its rhythm (steady or irregular).
• An EKG also records the strength and timing of electrical signals as they pass through each part of the heart.
• This test is used to detect and study many heart problems, such as heart attacks, arrhythmias (irregular heartbeats), and heart failure.
• EKG results also can suggest other disorders that affect heart function.
• The two most common types of portable EKGs are Holter and event monitors.

Holter monitoring

• A Holter monitor records the heart's electrical activity for a full 24 - 48 hour period.
• An event monitor records heart's electrical activity only at certain times while you're wearing it.