What does S1-S4 stand for?

S1-S4 stands for "First To Fourth Heart Sounds"

How to abbreviate "First To Fourth Heart Sounds"?

"First To Fourth Heart Sounds" can be abbreviated as S1-S4

What is the meaning of S1-S4 abbreviation?

The meaning of S1-S4 abbreviation is "First To Fourth Heart Sounds"

What does S1-S4 mean?

S1-S4 as abbreviation means "First To Fourth Heart Sounds"