Moderate rises in pleural pressure during positive-pressure ventilation have a minimal effect on cardiac output in normal subjects. What are some reasons for this lack of effect?
I.compensatory dilation of the large arteries
II.compensatory increase in venomotor tone
III.compensatory increase in the cardiac rate

Question

Quizplus · Accepted Answer

Compensatory increase in venomotor tone and cardiac rate help maintain cardiac output despite changes in pleural pressure.

Moderate Rises in Pleural Pressure During Positive-Pressure Ventilation Have a Minimal