Cardiac cycle

Question 1

When changing the cardiac cycle, what is affected more - diastole or systole?

Answer 1

Diastole (greater magnitude of change)

Question 2

What does the T wave correspond to on the ventricular pressure curve?

Answer 2

End of reduced ejection when aortic valve closes

Question 3

What creates the dicrotic notch (incisura) in the aortic pressure curve?

Answer 3

Backward pressure wave returning from periphery

Question 4

What is the equation for stroke volume?

Answer 4

LVEDV - LVESV

Question 5

When does physiological splitting of S2 occur?

Answer 5

1. During inspiration 2. Delayed closure of pulmonic valve 3. Early closure of aortic valve

Question 6

What causes a 4th heart sound?

Answer 6

Increase in ventricular pressure at end of atrial systole

Question 7

When is a diastolic murmur heard?

Answer 7

After S2 and before S1

Question 8

When is a systolic murmur heard?

Answer 8

After S1 and before S2 - throughout systole