HEART SOUNDS Flashcards
1
Q
mitral valve closure, why is this heart sound unique?
A
S1
mitral sound (M1) louder tricuspid sound (T1)
2
Q
aortic valve closure
A
S2
3
Q
Rapid ventricular filling
A
S3
4
Q
Atrial Contraction
A
S4
5
Q
what is unique about the S2 sounds?
A
closure of aortic (A2) and pulmonic valves (P2)
6
Q
what is the effect of the S2 heart sound on inspiration?
A
▪ Right side filling time is increased → increases right ventricle stroke volume
▪ Delays closure of pulmonic valve splitting S2 into 2 audible components (during inhale)
7
Q
what is the effect of the S2 heart sound on expiration?
A
▪ These two sounds fuse into single sound
▪ Walls of veins contain less smooth muscle
8
Q
of the 2 sounds produced by the S2, which on is louder?
A
A2 is normally louder and first → aortic pressure is higher
P2 is relatively soft → lower pressure in pulmonary arteries
