Ventricular Fibrillation

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Abstract
THE normal contraction of the ventricles is excited by the propagation throughout the myocardial cells of an action potential that arises in the sinoatrial node, travels through atrial fibers to the atrioventricular node, conducts slowly through the atrioventricular node, and reaches the ventricular myocardium via the bundle of His and the Purkinje fibers of the ventricular conducting system. This sequence leads to the co-ordinated contraction that is responsible for the ejection of blood from the ventricles into the pulmonary artery and aorta.If portions of the ventricle contract while other parts are relaxed, the relaxed parts stretch or distend so . . .