LEARN Flashcards
1
Q
what is s1
A
The 1st heart sound, S1 (lub), marks the beginning of systole (end of systole).
Related to the closure of the mitral and tricuspid valves.
Loudest at the apex.
2
Q
what is s2
A
The 2nd hear sound, S2 (dub), marks the end of systole (beginning of diastole).
Related to the closure of the aortic and pulmonic valves.
Loudest at the base.
