Heartbeat Lub Dub: Patched

The "lub-dub" is not merely a poetic expression but a precise physiological report. "Lub" is the sound of AV valves sealing for contraction, while "dub" is the sound of semilunar valves sealing for relaxation. Listening to this sequence provides a non-invasive window into the heart’s structural integrity and timing.

Under normal conditions, the "dub" may not be a single, pure sound. During inspiration (breathing in), increased venous return to the right heart delays the closure of the pulmonic valve. This causes the two components of S2 (aortic and pulmonic valves) to separate slightly, producing a physiological "splitting" of the dub—heard as "lub-du- dup " in young, healthy individuals. heartbeat lub dub

It is produced by the closure of the atrioventricular (AV) valves—the mitral and tricuspid valves —which separate the upper atria from the lower ventricles. The "lub-dub" is not merely a poetic expression

That steady rhythm. The one that sounds like home. ❤️ There is nothing quite like resting your head on someone’s chest and hearing that comforting lub-dub . It’s the soundtrack of safety, love, and being exactly where you’re meant to be. Turn up the volume on the love today. #heartbeat #couplegoals #love #lubdub #relationshipquotes Under normal conditions, the "dub" may not be