Talwar K K, Blomström P, Edvardsson N, William-Olsson G, Olsson S B
Pacing Clin Electrophysiol. 1984 Nov;7(6 Pt 1):979-84. doi: 10.1111/j.1540-8159.1984.tb05648.x.
The spatial vectorcardiograms (VCG) of 13 patients with WPW syndrome due to single accessory pathways were analyzed and correlated with the excitation analysis obtained on epicardial mapping. The azimuth angle of the initial 10 ms cardiac vector was greater than + 90 degrees (directed right and anteriorly) in patients with a left ventricular free wall; it ranged between 0 degree to 90 degrees (left and anteriorly) in those with a left or right paraseptal free wall and was -30 degrees (left and posteriorly) in one patient with a right ventricular free wall location. The elevation angle of the initial 10 and 20 ms cardiac vector was either zero or positive (inferiorly directed) in those with right and left ventricular free wall pathway. Among six patients with a paraseptal location, the elevation angle was negative (superiorly directed) in four and positive in two. Both the patients with a clockwise inscription of a QRS loop in the horizontal plane (HP) had pathways located to the left ventricle. Among the paraseptal group, at surgery, the accessory pathway could not be excised in two in spite of dissection very close to the IV (interventricular) septum. The elevation angle in both these patients was markedly negative (-45 degrees and -62 degrees) in contrast to the other in whom surgical excision was successful.+
对13例由单一旁路引起的预激综合征患者的空间向量心电图（VCG）进行了分析，并与心外膜标测获得的激动分析结果进行了相关性研究。左心室游离壁患者初始10毫秒心脏向量的方位角大于+90度（指向右前方）；左或右间隔旁游离壁患者的方位角在0度至90度之间（指向左前方），1例右心室游离壁患者的方位角为-30度（指向左后方）。右心室和左心室游离壁旁路患者初始10毫秒和20毫秒心脏向量的仰角为零或正值（指向下）。在6例间隔旁位置的患者中，4例仰角为负值（指向上），2例为正值。水平面上QRS环呈顺时针方向记录的患者，其旁路均位于左心室。在间隔旁组中，手术时，尽管在非常靠近室间隔（IV）处进行了分离，但仍有2例无法切除旁路。与手术切除成功的其他患者相比，这2例患者的仰角明显为负值（-45度和-62度）。
