A murmur is either systolic, diastolic or continuous throughout systole and diastole. Remember: Systole occurs between the S1 and S2 heart sounds, while diastole occurs between S2 and S1.

A murmur is due to turbulence of blood flow and can, at times, encompass all of systole or diastole. The main normal heart sounds are the S1 and the S2 heart sound. The S3 can be normal ...