S1 and S2 are the normal heart sounds you hear when the heart valves close. Heart murmurs are extra sounds that can be heard during systole, diastole, or as a continuous sound. S3 and S4 are abnormal ...

Heart auscultation by primary care providers detected heart murmurs in nearly 1 in 4 individuals in a Norwegian population. While murmurs were particularly useful for detecting aortic stenosis, their ...