Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Lauralee Sherwood
Chapter9: Cardiac Physiology
Section: Chapter Questions
Problem 3SQE
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Question
Know the three factors that alter ejection fraction (preload, afterload, and contractility)
Expert Solution
Step 1
The percentage of blood ejected from the left ventricle in a single contraction event is known as the ejection fraction. An ejection fraction of 70% indicates that 70% of the blood in the left ventricle was ejected during a single heartbeat. Its normal value ranges from 50-70%.
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