When exercise is prolonged or performed in a hot environment an increase in heart rate may be seen with a concomitant decrease in stroke volume. This phenomenon is known as:
A) law of LaPlace
B) Bohr Effect
C) Cardiac Drift
D) Valsalva Effect

Question

Quizplus · Accepted Answer

The phenomenon of an increase in heart rate and a concomitant decrease in stroke volume during prolonged exercise or in a hot environment is known as cardiac drift. This occurs as a result of an increase in core body temperature and dehydration which causes a decrease in blood volume and an increase in heart rate to maintain cardiac output.

When Exercise Is Prolonged or Performed in a Hot Environment