Here is everything you need to know about the genesis, characteristics, and clinical significance of S1. Contrary to popular belief, the heart sound is not the blood rushing through the chambers, nor is it the muscle contracting. S1 is a valvular event. Specifically, it is the sound generated by the sudden closure of the atrioventricular (AV) valves —the mitral (M1) and tricuspid (T1) valves.
So the next time you place your stethoscope on a patient’s chest, listen carefully to the first syllable. It might just tell you everything you need to know before the second one arrives. s1 heart sound
By [Author Name]