S1 is typically longer, lower-pitched, and duller than S2.
Disclaimer: This article is for educational purposes and does not constitute medical advice. Heart sound interpretation should be performed by qualified healthcare professionals in a clinical context. s1 and s1 heart sounds
If the asynchrony widens to greater than 30-40 ms, S1 becomes —heard as "L-ub" or "T-rub." A normal, physiologic split of S1 can sometimes be heard in young, thin individuals, particularly during expiration. However, a persistently wide split warrants investigation. S1 is typically longer, lower-pitched, and duller than S2
Because S1 depends on the position and function of the AV valves at the onset of systole, changes in its intensity or character point to specific cardiac abnormalities. S1 is typically longer