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英文誌(2004-)

Journal of Medical Ultrasonics

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1985 - Vol.12

Vol.12 No.02

Original Article(原著)

(0098 - 0104)

Ebstein奇形におけるsail soundの成因および三尖弁逆流の特異性について

Phono-, Echo- and Pulsed Doppler Echocardiographic Studies on the Genesis of "Sail Sound" and on the Characteristics of Tricuspid Regurgitation in Ebstein's Anomaly

福田 信夫, 富永 俊彦, 苛原 恵子, 三河 哲也, 山本 光昭, 日下 芳子, 浅井 幹夫, 大木 崇, 仁木 敏晴, 森 博愛

Nobuo FUKUDA, Toshihiko TOMINAGA, Keiko IRAHARA, Tetsuya MIKAWA, Mitsuaki YAMAMOTO, Yoshiko KUSAKA, Mikio ASAI, Takashi OKI, Toshiharu NIKI, Hiroyoshi MORI

徳島大学医学部第二内科

The Second Department of Internal Medicine, Faculty of Medicine, University of Tokushima

キーワード : Ebstein's anomaly, Sail sound, Tricuspid regurgitation, Tricuspid valve motion

 To clarify the genesis of a "sail sound" and to determine the beginning of tricuspid regurgitation (TR), four patients of Ebstein's anomaly were studied by phono- (PCG), echo- and pulsed Doppler echocardiographic (PDE) techniques. All patients had two tricuspid components (T1 and T2) of the first heart sound. A loud and clicky T2 was considered to be so called "sail sound". Temporary or incomplete closure of the tricuspid valve (TV) occurred simultaneously with T1 and finally complete coaptation of the TV coincided in time with T2. In two patients, the right ventricular pressure pulse showed two notches in the upstroke portion corresponding to T1 and T2, respectively. The onset of TR occurred at the time of T1 in either PCG or PDE.
 These results suggested that the genesis of "sail sound" was probably the tension of closing TV produced by the sudden halting of the closure in early systole rather than the coaptation itself of the TV, and that the appearance of TR prior to a "sail sound" was a characteristic finding of Ebstein's anomaly.