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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.

Auscultation Audio

auscultation sound from lesson
waveform

Patient Sounds

patient heart or lung sound
First Heart Sound (Minimally Split)

Half Speed Patient Sounds

patient heart or lung sound
First Heart Sound (Minimally Split)

Technique

Patient position
The patient's position should be supine.

Auscultation Tips

S1:Minimal splitting

Sound Wave



Observe Cardiac Animation

Authors and Sources

Authors and Reviewers


Sources

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First Heart Sound (Minimally Split) | #39
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