Which of the following is the most likely consequence of a very rapid heart rate?
A) decreased ventricular filling (with blood)
B) failure of the AV valves to open
C) failure of the SA node to fire
D) failure of the cardiac impulse to enter the His-Purkinje system

Question

Which of the following is the most likely consequence of a very rapid heart rate? 
A) decreased ventricular filling (with blood)
B) failure of the AV valves to open
C) failure of the SA node to fire
D) failure of the cardiac impulse to enter the His-Purkinje system

Quizplus · Accepted Answer

A very rapid heart rate decreases the time that the heart spends in diastole (relaxation).This results in less time for the ventricles to fill with blood,thereby decreasing cardiac output.

Which of the Following Is the Most Likely Consequence of a Very