Cardiomyopathy electrocardiogram

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Overview

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.

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.