Rückel A, Kasper W, Treese N, Henkel B, Pop T, Meinertz T
Am J Cardiol. 1984 Sep 1;54(6):561-3. doi: 10.1016/0002-9149(84)90248-0.
Twenty-two patients were studied by suprasternal M-mode echocardiography during ventricular tachycardia (VT). Adequate echocardiograms were obtained from 19 patients. Thirteen patients showed atrioventricular (AV) dissociation and 6 patients a ventriculoatrial contraction pattern according to the left atrial (LA) contraction obtained from the suprasternal notch. In 1 of these 6 patients, a 2:1 block retrograde was found by echocardiography. In another patient, an intermittent block occurred in the retrograde direction. In 4 patients, a constant relation between the QRS complex and LA contraction soon after the beginning of the QRS complex was seen, demonstrating a 1:1 ventriculoatrial conduction. According to the LA contraction obtained from the suprasternal echocardiogram, 13 patients showed AV dissociation and 6 patients a retrograde conduction to the LA. From the analysis of the 12-lead standard electrocardiogram obtained simultaneously during VT, AV dissociation could be recognized in only 3 patients. Thus, AV dissociation during VT is more easily diagnosed with suprasternal M-mode echocardiography than with the standard electrocardiogram.
在室性心动过速（VT）期间，通过胸骨上M型超声心动图对22例患者进行了研究。从19例患者获得了足够的超声心动图。根据从胸骨上切迹获得的左心房（LA）收缩情况，13例患者表现为房室（AV）分离，6例患者表现为心室心房收缩模式。在这6例患者中的1例，超声心动图发现2:1逆行阻滞。在另一例患者中，出现了间歇性逆行阻滞。在4例患者中，在QRS波群开始后不久，可见QRS波群与LA收缩之间存在恒定关系，表明存在1:1心室心房传导。根据从胸骨上超声心动图获得的LA收缩情况，13例患者表现为AV分离，6例患者存在向LA的逆行传导。从VT期间同时获得的12导联标准心电图分析来看，仅3例患者可识别出AV分离。因此，与标准心电图相比，胸骨上M型超声心动图更容易诊断VT期间的AV分离。
