Opening Snap and Second Heart Sound | #52

An opening snap occurring early in diastole along with a single second heart sound can mimic a split second heart sound. An opening snap is caused by thickened valve leaflets. When they open, it produces a snapping sound. The more severe the thickening the earlier in diastole the opening snap occurs. In this example you are hearing an opening snap, which occurs 75 milliseconds after the start of the second heart sound.

Auscultation Audio

auscultation sound from lesson
waveform

Patient Sounds

patient heart or lung sound
Opening Snap and Second Heart Sound

Half Speed Patient Sounds

patient heart or lung sound
Opening Snap and Second Heart Sound

Technique

Patient position
The patient's position should be supine.

Auscultation Tips

Diastole:Snap early in diastole, higher-pitch than S2

Sound Wave



Observe Cardiac Animation

An opening snap is caused by thickened valve leaflets. When they open it, produces a snapping sound. The more severe the thickening the earlier in diastole the opening snap occurs. In this example you are hearing an opening snap which occurs 75 milliseconds after the start of the second heart sound.
Authors and Sources

Authors and Reviewers


Sources

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Opening Snap and Second Heart Sound | #52

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