Question

By performing relevant research, provide the precise definition for each of the following items/variables. Physiology of...

By performing relevant research, provide the precise definition for each of the following items/variables. Physiology of sport and exercise.

  • Stroke volume
  • Cardiac output
  • Ejection fraction
  • Mean arterial pressure

Homework Answers

Answer #1
  • STROKE VOLUME - The amount of blood pumped out of left ventricle of the heart during each systolic contraction or each beat of heart. Normal value - 70 mL
  • CARDIAC OUTPUT - The amount of blood pumped out of the ventricle per minute. Cardiac output = Stroke volume × number of heart beats per minute.
  • EJECTION FRACTION - The percentage of blood pumped out of ventricle during each heart beat. In left ventricle, where ejection fraction is usually measured :-Normal - 55 % to 70%. Reduced - less than 50%. Borderline - 50% to 55%
  • MEAN ARTERIAL PRESSURE - Average pressure in arteries during one cardiac cycle, both systole and diastole. Normal value - 70 to 100 mmHg
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