Heart Sound S1 ~upd~ Jun 2026

🔊 It marks the beginning of systole (ventricular contraction).

S1 is primarily generated by vibrations within the cardio-hemic system caused by the abrupt halt of blood flow and the tensing of the chordae tendineae and valve leaflets. Under resting conditions, S1 typically lasts between , with a dominant frequency range of 30 to 150 Hz . Physiologically, S1 coincides with: heart sound s1

S1 occurs due to the following events:

Abnormalities in S1 can indicate various cardiac conditions, such as: 🔊 It marks the beginning of systole (ventricular

If you want to learn more about heart sounds and cardiac physiology, I can suggest some additional resources. S1 typically lasts between