Principles of Anatomy and Physiology 14e with Atlas of the Skeleton Set (14th Edition)

Published by Wiley
ISBN 10: 1-11877-456-6
ISBN 13: 978-1-11877-456-4

Chapter 20 - The Cardiovascular System: The Heart - Figure 20.24 - Page 725: 1

Answer

In ventricular fibrillation the the ventricular pump stops working because of the asynchronous contraction of the cardiac muscle fibers. The result is that blood ejection ceases. Circulatory failure and death results from this condition unless, immediate medical treatment is available.

Work Step by Step

Ventricular fibrillation is a deadly arrhythmia. It can be caused by a myocardial infarction, by coronary artery disease, by cardiovascular shock, by electric shock, or low serum potassium. Ventricular arrhythmia causes unconsciousness in seconds ; this progresses to irreversible brain damage and seizures in about 5 minutes. Death follows shortly.
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