Murmurs Flashcards
1
Q
What makes the first heart sound (S1)?
A
The closing of the atrioventricular valves (tricuspid and mitral valves) at the start of the systolic contraction of the ventricles
2
Q
What makes the second heart sound (S2)?
A
The closing of the semilunar valves (aortic and pulmonary valves) at the end of systole
