The Cardiologist uses the stethoscope for cardiac auscultation; listening carefully to detect irregular rhythms, an S3 or S4 often noted in CHF and heart murmurs heard with stenotic valve lesions.

• 心脏科医生使用听诊器进行心脏听诊，仔细倾听来发现心律失常、力衰竭时常出现的第三心音(3)第四心音(4)及狭窄性瓣膜病变时产生的心脏杂音。