First Heart Sound (Minimally Split)
First Heart Sound (Minimally Split)On occasion the first heart sound can be made up of two separate sounds separated by a very small interval (20-30 milliseconds). The Mitral component (caused by closure of the Mitral valve) comes first and is louder than the Tricuspid component (caused by closure of the Tricuspid valve). A minimally split first heart sound is a normal variation of the first heart sound.
Patient Recording - Half Speed Playback
The patient's position should be supine.
Listening TipsS1:Minimal splitting
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