Midsystolic murmurs — also known as systolic ejection murmurs, or SEM — include the murmurs of aortic stenosis, pulmonic stenosis, hypertrophic obstructive cardiomyopathy and atrial septal ...
Systolic murmurs can be classified as either midsystolic (systolic ejection murmurs, or SEM), holosystolic (pansystolic) or late systolic. A midsystolic murmur begins just after the S1 heart sound ...