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Institute of Human Anatomy
How the Heart Contracts: Understanding the Electrical Activity and Heart Arrhythmias
In this video, the teacher explains how the heart is able to contract dependably through its natural pacemaker, the SA node, and other specialized cells. The electrocardiogram (ECG) is also discussed as a highly effective method of...
Khan Academy
Khan Academy: Ventricular Tachycardia (Vtach)
Learn about the heart condition ventricular tachycardia. [7:43]