First and Second Heart Sounds - Normal and Unsplit | #32

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.

Auscultation Audio

auscultation sound from lesson
waveform

Patient Sounds

patient heart or lung sound
First and Second Heart Sounds - Normal and Unsplit

Half Speed Patient Sounds

patient heart or lung sound
First and Second Heart Sounds - Normal and Unsplit

Technique

Patient position
The patient's position should be supine.

Auscultation Tips

Sound Wave



Observe Cardiac Animation

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

Return to Reference Guide Index Page
First and Second Heart Sounds - Normal and Unsplit | #32




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