First Heart Sound (Markedly Split) Auscultation Reference

Unlock quizzes, lessons and more.

Sign Up
heart lung sounds waveform synthetic

Lesson

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

If the splitting of the first heart sound is large (about 50 milliseconds) it is an indication of an abnormal condition called Right Bundle Branch Block. The splitting is most clearly heard at the tricuspid area.

In the mitral valve area, the mitral component is louder.

At 50 milliseconds, the splitting of the first heart sound is clearly audible.

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

S1: Splitting..
Auscultate this sound over tricuspid and mitral areas.

Auscultation Method

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



Relevant Courses

If you wish to review a complete mobile concerning First Heart Sound (Markedly 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.

First Heart Sound (Markedly Split) Auscultation Reference