Answered: What is cardiac output? How do you…

What is cardiac output? How do you anticipate increased heart rate to impact stroke volume? Briefly explain your answer by outlining the impact of heart rate on the phases of the cardiac cycle.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter9: Cardiac Physiology

Section9.2: Electrical Activity Of The Heart

Problem 2CYU

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What is cardiac output? How do you anticipate increased heart rate to impact stroke volume? Briefly explain your answer by outlining the impact of heart rate on the phases of the cardiac cycle.

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There are three major factors that affect stroke volume and therefore affect cardiac output: afterload, preload, and contractility. Select two of these factors and explain how and why each affects cardiac output.
The end systolic volume from an individual’s heart was found to be 50 ml, the end diastolic volume was found to be 110 ml and the heart rate was 90 bpm. What is this individual’s stroke volume, ejection fraction and cardiac output (C.O)? Group of answer choices SV = 60 ml Ejection Fraction = 50% C.O = 3.4 l/min SV = 110 ml Ejection Fraction = 52% C.O = 4.4 l/min SV = 60 ml Ejection Fraction = 55% C.O = 5.4 l/min SV = 160 ml Ejection Fraction = 70 % C.O = 6.4 l/min
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