Atrial tachycardia caused by a superior vena cava fibrillation with conduction block

AbstractAT caused by SVC fibrillationHere, we report a case of a 62-year-old man with a history of incessant atrial tachycardia (AT) for several years. An electrophysiological study revealed rapid and irregular activity in the superior vena cava (SVC), but the surface 12-lead electrocardiogram (ECG) exhibited a relatively regular AT (atrial cycle length=240ms). CARTO mapping of the right atrium (RA) demonstrated that the earliest atrial activation occurred at the posterior septum of the upper RA (the SVC–RA junction). Intravenous administration of 20mg adenosine triphosphate (ATP) led to an acceleration of the SVC–RA conduction up to 1:1 conduction, and the atrial cycle length decreased, consequently converting the AT to transient atrial fibrillation (AF). Application of single radiofrequency energy at the earliest atrial activation site during tachycardia terminated the AT and achieved isolation of the SVC from the RA, despite the continued presence of fibrillation in the SVC. We speculated that SVC fibrillation with spontaneous conduction block at the SVC–RA junction was the cause of this AT

チョーサー作『カンタベリー物語』Hg, El写本の言語の計量的比較

研究期間:平成14-15年度 ; 研究種目:基盤研究C2 ; 課題番号:1451052

チョーサー作『カンタベリー物語』Hg, El写本及び刊本の言語の計量的比較

研究期間:平成16-17年度 ; 研究種目:基盤研究C2 ; 課題番号:1652015

コンピュータによるチョーサーの夢物語詩諸刊本の計量的比較

研究期間:平成11-12年度 ; 研究種目: 基盤研究C2 ; 課題番号:1161049

『カンタベリー物語』Hg, El写本及び刊本の言語的比較

研究期間:平成18-19年度 ; 研究種目:基盤研究C ; 課題番号: 1852020

Positions of Ornamental Letters within a Word in the Hengwrt and Ellesmere Manuscripts of Geoffrey Chaucer's The Canterbury Tales

松尾雅嗣教授退職記念論文集 平和学を拓