Auscultation Training by Repetition

Innocent Murmur - C401, #36

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Listen for 2-3 minutes

Supine

Bell/Diaphragm

Listening Tips

Systole: Early, short duration murmur, increases with inspiration.

Repetition Training - Basic Heart Sounds

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Lesson Text

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.

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soundID	14
maneuver	Supine
Title	Innocent Murmur
Position	Pulmonic
realSoundID
caseID	36
S1
Systole	Early, short duration murmur, increases with inspiration
S2
Diastole
features
lung sounds	False
chestpiece	Bell/Diaphragm

c401

CaseID	36
CourseID	22
CourseCaseOrder	5
ID	21