Which of the following mechanisms is responsible for increasing cardiac output after SV has reached its maximum value?

Question

Quizplus · Accepted Answer

The stroke volume (SV) increases to its maximum value within the first half of the tolerable work rate range (at approximately 45% of the maximal oxygen consumption). From that point on, SV remains fairly constant; the only way the heart can then further increase its output is to increase its rate of contraction.

Which of the Following Mechanisms Is Responsible for Increasing Cardiac