A S3 can be a normal finding in children, pregnant females, and well trained athletes, however a S4 heart sound is almost always abnormal. A S3 can be an important sign of systolic heart failure ...

S1 and S2 are normal heart sounds. Other heart sounds, such as S3 and S4, are abnormal. The heart has four chambers and valves: Heart sounds are broken down into two categories: systolic (related ...

Therefore, any condition that creates a noncompliant LV will produce a S4, whereas any condition that creates an overly compliant LV will produce a S3 heart sound. A S4 heart sound can be an ...