…For example, if a patient with high blood pressure has an increased second or third heart sound, it can be determined that high blood pressure is putting a strain on the heart. In addition to the first, second, and third heart sounds, there are also short-duration abnormal heart sounds such as the fourth heart sound and the mitral valve opening sound. The fourth heart sound is an atrial sound, but it is not heard in a normal heart and occurs when the ventricles are under stress, such as in heart failure. … *Some of the terms that refer to "abnormal heart sounds" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…たとえば高血圧の患者でII音やIII音の増大があれば,高血圧によって心臓に負担がかかっていると判断できる。I,II,III音のほか,持続の短い異常心音としてIV音や僧帽弁開放音などがある。IV音は心房音であるが正常の心臓ではみられず,心室に負荷が加わっているときに,たとえば心不全のときなどに発生する。… ※「異常心音」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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