S3 Heart Sound

Abnormal Heart Sounds Normally, the heart produces two sounds — S1 and S2, known as lub-dub, caused by valve closure. When the heart is abnormal, extra or altered sounds may be heard. 🔹 Heart Murmur A murmur is a whooshing sound caused by turbulent blood flow, often due to valve stenosis, valve regurgitation, or congenital heart defects. 🔹 S3 Gallop This low-pitched sound occurs after S2 and indicates increased ventricular filling, commonly seen in heart failure or volume overload. 🔹 S4 Gallo