Researchers do an experiment to find out how exercise affects hemodynamics. Invasive parameter monitoring is done to create a left ventricular pressure-volume loop. Which of the following changes is most likely to occur after moderate to intense activity in comparison to at rest? (solid line: at rest; dashed line: during exercise)

Question

Quizplus · Accepted Answer

Eductional Objective: Enhanced preload and increased contractility, both of which help to increase stroke volume, are two alterations to the left ventricular pressure-volume loop that occur during moderate to intense exercise. Despite the fact that decreased systemic vascular resistance reduces afterload, elevated preload and contractility overwhelm the reduction in systolic pressure, leading to an overall rise in afterload.

Researchers Do an Experiment to Find Out How Exercise Affects