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Electrical impulses control the intracellular movement of calcium ions that regulate contraction and relaxation of cardiac myocytes. Organization of these impulses therefore determines the pattern and timing of contraction and relaxation, which is important to optimize cardiac output. Coordinated electrical activity is vital for this and is achieved by the cardiac conduction system. This section considers the Cardiac conduction system; Normal heart rhythms; Bradyarrhythmias; Sinus tachycardia; Supraventricular arrhythmias; Ventricular arrhythmias; Cardiac arrest rhythms; Intraventricular conduction defects; and Electrical alternans.
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Arrhythmias, Page 1 of 1
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