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Physiologically Split Second Heart Sound Lesson

Virtual Auscultation

patient torso with stethoscope chestpiece

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


Timing between the aortic and pulmonic components of the second heart sound varies during normal respiration. This causes splitting of the second heart sound.

Maximum splitting occurs at peak inspiration. In this recording, the S2 split is 60 milliseconds at peak inspiration with no splitting at peak expiration.


Heart Sounds Video

Authors and Sources

Authors and Reviewers


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