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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 Sounds

auscultation sound from lesson
waveform

Patient Recording of First Heart Sound (Minimally Split)

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

Patient Recording - Half Speed

patient auscultation point for First Heart Sound (Minimally Split)
First Heart Sound (Minimally Split)

Position

Patient position for auscultation
The patient's position should be supine.

Listening Tips for First Heart Sound (Minimally Split)

S1:Minimal splitting

Waveform (Phonocardiogram)



Observe Cardiac Animation for First Heart Sound (Minimally Split)

Authors and Sources

Authors and Reviewers


Sources

Return to Reference Guide Index Page
First Heart Sound (Minimally Split) | #39




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