![]() The first heart sound may be loud if individuals have mitral stenosis or exaggerated contractions of the heart, such as in tachycardia. It may occur in people with stiffened left ventricles, indicating that they may have hypertension or aortic stenosis, among other health problems.Ī person may experience a loud or soft S1 sound, indicating they may have an underlying health problem. Doctors may refer to it as atrial gallop and presystolic gallop. S4: The fourth heart sound is low-pitched and quiet.S3 occurrence is normal in young people and athletes, but can also indicate heart failure. It occurs after S2, and medical professionals may refer to it as ventricular gallop. S3 : The third heart sound has low-frequency components and produces a short vibrating sound.S2: This occurs when the aortic and pulmonic valves close when the heart muscles relax. ![]() It usually sounds like a single noise because both valves’ closure occurs almost simultaneously.
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