Our first lesson presents a normal first and second heart sound. This recording was taken over the Apex (Mitral valve area. The the closing of the mitral and tricuspid valve leaflets produce the first heart sound. When the aortic and pulmonic valve leaflets close, the second heart sound is created. The first heart sound has a slightly greater intensity than the second heart sound. The first heart sound is also called S1 and the second heart sound, S2.






About

Content on this site is for medical professional reference purposes. It is not a substitute for care from a licensed health-care professional. You should not rely solely on this content, and the website owners assume no liability for inaccuracies.

2018 © Clinical Skills Education LLC. All Rights Reserved.