Asked by princess marian escalera on Jul 20, 2024
Verified
Assume that the left ventricle of a child's heart has an EDV=90mL, and ESV=60mL, and a cardiac output of 2,400 mL/min. His SV is ________ mL/beat, and his HR is ________ bpm.
A) 30; 80
B) 40; 60
C) 80; 30
D) 150; 16
E) 16; 150
EDV
End-Diastolic Volume, the amount of blood in the ventricles of the heart immediately before it contracts.
ESV
End-Systolic Volume, the volume of blood in the ventricle at the end of contraction, just before ventricular relaxation.
HR
An acronym for Heart Rate, which is the number of times the heart beats per minute, an important indicator of cardiovascular health.
- Gain understanding of the adult heart's physical traits and measurements.
- Appreciate the role of preload and afterload in determining the heart's effectiveness in pumping.
Verified Answer
AP
Amarjot PunniJul 23, 2024
Final Answer :
A
Explanation :
Stroke Volume (SV) is calculated as the difference between End Diastolic Volume (EDV) and End Systolic Volume (ESV), which is 90mL - 60mL = 30mL. Heart Rate (HR) is calculated by dividing the Cardiac Output (CO) by the Stroke Volume (SV), which is 2400 mL/min / 30 mL/beat = 80 beats per minute (bpm).
Learning Objectives
- Gain understanding of the adult heart's physical traits and measurements.
- Appreciate the role of preload and afterload in determining the heart's effectiveness in pumping.