Drinkovic N
Am J Cardiol. 1982 Nov;50(5):1104-8. doi: 10.1016/0002-9149(82)90426-x.
The M-mode echocardiogram of the right atrial (RA) wall can be easily recorded in each person from the subcostal location. In a normal RA wall motion pattern, atrial contraction is represented by a markedly prominent posterior motion. The presence or absence of atrial contractions in the subcostal RA wall echocardiogram, their amplitude, and their timing may help in the diagnosis of cardiac arrhythmias with the simultaneously recorded non-diagnostic electrocardiogram. Flat and hidden P waves can be accurately identified throughout the cardiac cycle. It is possible to distinguish between atrial, ventricular, and nodal premature beats and to recognize atrial fibrillation, atrial flutter, paroxysmal atrial tachycardia, paroxysmal atrial tachycardia with block, atrioventricular (AV) nodal tachycardia, and supraventricular tachycardias with aberrant ventricular conduction. The diagnosis of wandering pacemaker, AV dissociation, sinoatrial block, and AV block is facilitated. On the basis of study of 60 patients with various rhythm disturbances, it was concluded that analysis of the subcostal RA wall echocardiogram is a new, helpful noninvasive approach in the diagnosis of cardiac arrhythmias.
右心房（RA）壁的M型超声心动图可在每个人的肋下位置轻松记录。在正常的右心房壁运动模式中，心房收缩表现为明显突出的向后运动。肋下右心房壁超声心动图中心房收缩的有无、幅度及其时间，可能有助于在同时记录的非诊断性心电图情况下诊断心律失常。在整个心动周期中可以准确识别平坦和隐匿的P波。可以区分房性、室性和结性早搏，并识别心房颤动、心房扑动、阵发性房性心动过速、伴有阻滞的阵发性房性心动过速、房室（AV）结性心动过速以及伴有心室传导异常的室上性心动过速。有助于诊断游走起搏点、房室分离、窦房阻滞和房室阻滞。基于对60例各种节律紊乱患者的研究，得出结论：肋下右心房壁超声心动图分析是诊断心律失常的一种新的、有用的非侵入性方法。
