Second Heart Sound - Physiologic Split Auscultation Reference

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heart lung sounds waveform patient normal speed
heart lung sounds waveform patient half speed
heart lung sounds waveform synthetic

Lesson

For heart sounds listen to the synthetic sound while reviewing this lesson.

During normal breathing, the timing between the aortic and pulmonic components of the second heart sound varies. This causes the second heart sound to be split.

Maximum splitting occurs at peak inspiration. In the example you are hearing the splitting of the second heart sound is 60 milliseconds at peak inspiration and zero splitting at peak expiration.

As you listen to this sound, observe the waveform. This is a graph of sound amplitude (loudness) on the vertical axis vs time on the horizontal axis.


Additional Listening Tips

S2: Splitting widest at peak inspiration.

Auscultation Method

maneuver
The recommended patient position is supine
torso
For this sound, use stethoscope's bell The recommended auscultation position for the stethoscope is pulmonic



Relevant Courses

If you wish to review a complete mobile concerning Second Heart Sound - Physiologic Split Auscultation Reference and related heart sounds, the modules(s) listed below may be useful. Each lesson includes text that explains the auscultatory sound and its clinical significance. The lesson also includes an audio track for playback. A waveform provides a great way to visualize the sounds. Finally, we also include an animation video. For heart sounds, the video illustrates heart muscle and valve movements along with blood flow. For lung sounds, the primary source of the sounds can be seen. Each module also includes a quiz.

Second Heart Sound - Physiologic Split Auscultation Reference