Heart Sound by Valve Closure Sequence Mnemonic

Many Things Are Possible

Mitral valve closure = 1st part of 1st heart sound = A1 
Tricuspid valve closure = 2nd part of 1st heart sound = A2 
Aortic valve closure = 1st part of 2nd heart sound = P2 
Pulmonic valve closure = 2nd part of 2nd heart sound = P2