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Therapy of Cardiac Arrhythmia.

Melvin Scheinman

The heart is made up of muscle tissue and functions as a pump. The heart, like any muscle, requires energy and oxygen to function. The electrical conduction system that governs the contraction of the heart's different chambers regulates the heart's pumping motion. A cardiac arrhythmia is a heart rhythm that is abnormal. Abnormal electrical signals sent via the heart muscle can cause the heart to beat too rapidly (tachycardia), too slowly (bradycardia), or irregularly in an arrhythmia.