Innocent Murmur Auscultation Reference

heart lung sounds waveform synthetic

Lesson

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

This is an example of an innocent murmur.

This type of murmur is seen with non-cardiac conditions such as pregnancy, hyperthyroidism, exercise and anemia. When these are treated appropriately the systolic murmur disappears.

The murmur is heard in early systole, is of short duration and has a frequency range of 120 hz to 250 hz. It is best auscultated in the pulmonic area and increases in intensity with inspiration. It can be heard with either the bell or diaphragm.

In this example S1 and S2 are normal. Diastole is silent.

The short duration and mid-range frequency characterize an innocent murmur.

The waveform(s) seen above are a chart of sound amplitude (loudness) on the vertical axis against time on the horizontal axis.


Listening Tips

A summary of the key aspects of this heart or lung sound.
Systole: Early, short duration murmur, increases with inspiration.

Auscultation Method

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



Relevant Courses

If you wish to review a complete mobile concerning Innocent Murmur 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.

Innocent Murmur Auscultation Reference







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