Akita H, Matsuoka S, Taguchi Y, Kubo M, Hayabuchi Y, Kuroda Y
Department of Pediatrics, University of Tokushima, School of Medicine.
Kokyu To Junkan. 1992 Oct;40(10):993-7.
Abnormalities in the signal-averaged electrocardiogram (SAECG) of patients with Ebstein's anomaly were studied. A SAECG was obtained in 4 patients with Ebstein's anomaly, aged 3 to 25 years. The control groups included 8 patients with atrial septal defect (ASD group), 10 with right bundle branch block (RBBB group), 8 with Wolff-Parkinson-White (WPW) syndrome (WPW group), and 40 normal subjects (Normal group). The SAECG was calculated by the vector-magnitude method using the VCM-3000. The root-mean-square during the initial 20 msec of the filtered QRS (i-RMS) was very small in 2 older patients with Ebstein's anomaly compared to the ASD group, the RBBB group and the Normal group, and was as small as that in the WPW group. This probably was affected by the delta wave associated with Ebstein's anomaly or concealed accessory pathway. The root-mean-square during the terminal 40 msec of the filtered QRS (t-RMS) was small in the patients with Ebstein's anomaly and the RBBB group. Two patients with Ebstein's anomaly had a smaller t-RMS than the RBBB group, suggesting pathological changes of an atrialized right ventricle. In conclusion, SAECG is useful for evaluating patients with Ebstein's anomaly, especially older patients.
研究了埃布斯坦畸形患者信号平均心电图（SAECG）的异常情况。对4例年龄在3至25岁的埃布斯坦畸形患者进行了SAECG检查。对照组包括8例房间隔缺损患者（ASD组）、10例右束支传导阻滞患者（RBBB组）、8例预激综合征患者（WPW组）和40例正常受试者（正常组）。使用VCM - 3000通过矢量幅度法计算SAECG。与ASD组、RBBB组和正常组相比，2例年龄较大的埃布斯坦畸形患者在滤波后QRS波初始20毫秒期间的均方根（i - RMS）非常小，且与WPW组一样小。这可能受与埃布斯坦畸形相关的δ波或隐匿性附加通路影响。在埃布斯坦畸形患者和RBBB组中，滤波后QRS波终末40毫秒期间的均方根（t - RMS）较小。2例埃布斯坦畸形患者的t - RMS比RBBB组小，提示右房化右心室存在病理改变。总之，SAECG对评估埃布斯坦畸形患者，尤其是老年患者很有用。
