Match the pressure relationships, labelled a. through e., with the times in question. (Options may be used more than once or not at all.)
-during isovolumetric ventricular contraction
A)aortic pressure ventricular pressure atrial pressure
B)ventricular pressure aortic pressure atrial pressure
C)aortic pressure atrial pressure ventricular pressure
D)ventricular pressure atrial pressure aortic pressure
E)atrial pressure ventricular pressure aortic pressure

Question

Match the pressure relationships, labelled a. through e., with the times in question. (Options may be used more than once or not at all.)
-during isovolumetric ventricular contraction
A)aortic pressure > ventricular pressure > atrial pressure
B)ventricular pressure > aortic pressure > atrial pressure
C)aortic pressure > atrial pressure > ventricular pressure
D)ventricular pressure > atrial pressure > aortic pressure
E)atrial pressure > ventricular pressure > aortic pressure

Quizplus · Accepted Answer

During isovolumetric ventricular contraction, the ventricles are contracting but the volume does not change because the valves are closed. The aortic pressure remains higher than the ventricular pressure to prevent backflow of blood into the ventricle, and the ventricular pressure is higher than the atrial pressure because the ventricles are contracting and the atrioventricular valves are closed, preventing backflow into the atria.

Match the Pressure Relationships, Labelled A