Innocent Murmur Lesson #657

patient thorax when auscultating by stethoscope

patient position during auscultation
The patient was supine during auscultation.

Description

An innocent murmur is seen in children and in adults with pregnancy, hyperthyroidism, exercise, and anemia conditions.

The murmur is heard in early systole. An innocent murmur is of short duration and has a frequency range of 120Hz to 250Hz. 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 recording S1 and S2 are normal. Diastole is silent. The short duration and mid-range frequency characterize an innocent murmur.

Phonocardiogram

Anatomy

Innocent Murmur


Authors and Sources

Authors and Reviewers

Sources


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