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Steve is a runner with a target heart rate of 135 bpm. His resting pulse is...

Steve is a runner with a target heart rate of 135 bpm. His resting pulse is 70 bpm. His blood volume is approximately 6.8 liters. At rest, his cardiac output is 6.3 liters/min. A. What must his stroke volume be? B. What is his EDV if his ESV is 50 mL? C. During his workout, his heart rate increases to 135 bpm and his cardiac output to 13,500 mL/min. Did his SV change with exercise? If his EDV is 160 during his workout, what is his ESV? D. Why is afterload important to cardiac function?

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