The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning of SYSTOLE and is heard as a lubb sound; the second is produced by the closing of the AORTIC VALVE and PULMONARY VALVE and is heard as a dupp sound; the third is produced by vibrations of the ventricular walls when suddenly distended by the rush of blood from the HEART ATRIA; and the fourth is produced by atrial contraction and ventricular filling.

Annotation

note category: do not confuse with HEART MURMURS, a disease concept

DUI

D006347 MeSH Browser

CUI

M0009970

History note

91(75); was see under HEART AUSCULTATION 1963-90; was in Cat E 1963-90

Online note

search HEART AUSCULTATION 1966-74

Public note

91; was see under HEART AUSCULTATION 1963-90; was in Cat E 1963-90