Third and Fourth Heart Sound Gallop 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.

Both the third and fourth heart sounds (S3 and S4) are low frequency. S4 is lower than S3.

This is a pattern that occurs with improvement of heart failure. That is, an S3 pattern gives way to an S3 S4 pattern as the patient improves.

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

Diastole: S3 and S4 present; galloping sound.

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 mitral



Relevant Courses

If you wish to review a complete mobile concerning Third and Fourth Heart Sound Gallop 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.

Third and Fourth Heart Sound Gallop Auscultation Reference