Lub Dub Heart Sounds Info

: It is primarily produced by the simultaneous closure of the mitral and tricuspid (atrioventricular) valves .

The classic "lub-dub" isn't actually the sound of your heart muscle squeezing; it’s the sound of your , much like a door slamming. These sounds, known medically as S1 (lub) and S2 (dub), mark the major mechanical transitions in your cardiac cycle. The "Lub-Dub" Breakdown Medical Term What it Signals Lub S1 Closure of Mitral and Tricuspid valves lub dub heart sounds

During inspiration, the gap between A2 and P2 widens, allowing the clinician to hear two distinct "dub" sounds (split S2). During expiration, the sounds merge back into one. : It is primarily produced by the simultaneous