The cardiac cycle Flashcards
1
Q
What causes the lub sound
A
S1 - closure of AV valves when ventricular pressure exceeds atrial pressure
2
Q
What causes the dub sound
A
S2 - closure of aortic and pulmonary valves (semilunar) when pressure in aorta exceeds ventricular pressure
3
Q
When is ventricular systole heard?
A
Between S1 and S2
4
Q
When is atrial systole heard
A
