What Causes Still Murmur

The cause of Still’s murmur is not well understood. It is thought to be due to the resonance of blood ejected into the aorta, or to the vibration of the chordae tendineae.

How common is stills murmur?

Epidemiology. Still’s murmurs may occur in as many as a third of all children. This type of murmur occurs most often in children two to seven years of age, but can occur in younger or older children.

Is still murmur an innocent murmur?

Still’s murmur (a.k.a. “innocent murmur” or “functional murmur”) refers to a benign flow murmur across the aortic valve from high cardiac output and/or increased contractility (inotropy). Frequently seen in the pediatric population, Still’s murmur can disappear as the person moves into adolescence.