Heart Sound Lub Dub [best] Jun 2026

sounds like “clos-ing” (mitral/tricuspid close) “Dub” sounds like “ex-it” (aortic/pulmonic close)

Lub is like a door slamming shut on the upper chambers; dub is the exit doors closing after blood leaves the heart. heart sound lub dub

While the "lub-dub" sound is a normal and reassuring indicator of heart health, abnormal heart sounds can indicate underlying conditions, such as: heart sound lub dub