Systolic Murmur
Overview
A systolic murmur is an abnormal sound that is present in systole, between the first heart sound (S1) and the second heart sound (S2).
Note whether the murmur is present in early, middle or late systole, or is pansystolic.
Causes of Systolic Murmur
- Aortic stenosis
- Mitral regurgitation
- Tricuspid regurgitation
- Ventricular septal defect
- Hypertrophic obstructive cardiomyopathy
- Pulmonary stenosis
Soft systolic murmur - likely innocent murmur due to physiological bloodflow
Early systolic murmur - ventricular septal defect, mitral regurgitation, tricuspid regurgitation
Ejection (Mid)Systolic Murmur - aortic or pulmonary stenosis
Late systolic murmur - mitral valve prolapse
Pansystolic murmur - tricuspid or mitral regurgitation
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