Kawano Akiko, Oshima Ayumi, Masutani Satoshi, Ishiguro Akio, Iwamoto Yoichi, Ishido Hirotaka, Taketazu Mio, Senzaki Hideaki
Division of Neonatology, Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan.
Department of Pediatrics and Pediatric Cardiology, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan.
Clin Med Insights Cardiol. 2018 Apr 18;12:1179546818771700. doi: 10.1177/1179546818771700. eCollection 2018.
M-mode echocardiography has been playing an important role in the diagnosis of fetal tachyarrhythmia. We recently encountered a neonatal case of atrial flutter with 2:1 atrioventricular conduction. However, M-mode erroneously indicated 1:1 atrioventricular movement. While the movement of the atrial wall far from the atrioventricular valve was much faster than that of the ventricular wall, the atrial wall adjacent to the atrioventricular valve fully synchronized to that of the ventricular wall. Thus, to avoid this novel pitfall, it would be important to add an additional assessment focusing on the movement of the atrial wall far from the ventricle.
M型超声心动图在胎儿快速心律失常的诊断中一直发挥着重要作用。我们最近遇到一例新生儿房扑伴2:1房室传导的病例。然而，M型超声错误地显示为1:1房室运动。远离房室瓣的心房壁运动比心室壁运动快得多，而与房室瓣相邻的心房壁与心室壁完全同步。因此，为避免这一新型陷阱，增加一项侧重于远离心室的心房壁运动的额外评估很重要。
