First and Second Heart Sounds - Normal and Unsplit Auscultation Lesson with Recordings

Virtual Auscultation

patient torso with stethoscope chestpiece

patient position during auscultation
The patient's position is supine.

Lesson

This is a normal first and second heart sound at 60 beats per minute. You are auscultating at the Mitral valve area (Apex). The first heart sound has slightly greater intensity than the second heart sound.
  • The first heart sound is produced by the closing of the mitral and tricuspid valve leaflets.
  • The second heart sound is produced by the closing of the aortic and pulmonic valve leaflets.
  • The second heart sound is unsplit when the subject is holding his or her breath at peak expiration.
1

Waveform




Heart Sounds Video

The first heart sound is produced by the closing of the mitral and tricuspid valve leaflets. The second heart sound is produced by the closing of the aortic and pulmonic valve leaflets.


Authors and Sources

Authors and Reviewers

Sources

? v:5 | onAr:0 | onPs:2 | tLb:5 | tLbJs:0
isPageNeedsInvoke:False | isTc: False | em: | np:
isHome:False | uStat: False | db:0 | pu:False | jsNext:False | pv:1 | now: 7/24/2024 2:06:13 AM



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