Prakash R
J Am Geriatr Soc. 1978 Aug;26(8):372-4. doi: 10.1111/j.1532-5415.1978.tb03687.x.
In 20 cardiac patients, a study was made of the relationship between the second heart sound (S2) recorded by phonocardiography and the motion of the aortic valve recorded by simultaneous echocardiography. Since the first component of S2 coincided with closure of the aortic valve in all 20 patients, it is concluded that the origin of the first component of S2 may be related to aortic valve closure.
在20名心脏病患者中,对心音图记录的第二心音(S2)与同步超声心动图记录的主动脉瓣运动之间的关系进行了研究。由于在所有20名患者中S2的第一成分与主动脉瓣关闭同时发生,因此得出结论,S2第一成分的起源可能与主动脉瓣关闭有关。