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Cardiovascular System

The Heart

How can electrical activity of the heart be monitored?

The electrical activity of the heart can be monitored by an electrocardiogram. Electrodes are placed at different locations on the chest and each time the heart beats, there is a wave of electrical activity through the heart muscle. This test can detect very slight changes in the heart’s electrical activity through deflections on a monitor. An electrocardiogram can be used to detect and diagnose cardiac arrhythmias, which are abnormalities in the heart’s conduction system.



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