Liu Tu-Ying, Tai Ching-Tai, Lee Pi-Chang, Hsieh Ming-Hsiung, Higa Satoshi, Ding Yu-An, Chen Shih-Ann
Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Taipei Veterans General Hospital, Taiwan, Republic of China.
J Cardiovasc Electrophysiol. 2003 May;14(5):533-9. doi: 10.1046/j.1540-8167.2003.02473.x.
Information about the activation patterns inside the superior vena cava (SVC) and entry and exit sites at the SVC-right atrial (RA) junction during SVC tachyarrhythmia is limited.
A detailed characterization of electrophysiologic mechanisms and ablation strategies was performed using a noncontact three-dimensional mapping system in two cases of SVC tachycardia. The first case demonstrated SVC tachycardia originating from an ectopic focus inside the SVC, with sustained depolarization and conduction to the atrium. Entry and exit sites across the SVC-RA junction were located very close to each other. The second case demonstrated two different reentrant circuits, one inside the SVC and the other into and out of the SVC-RA junction. The entry and exit sites were located far away from each other.
Noncontact mapping may help to reveal the mechanism of SVC tachyarrhythmias and to locate entry and exit sites at the SVC-RA junction as a guide for catheter ablation.
关于上腔静脉（SVC）内的激活模式以及上腔静脉-右心房（RA）交界处的进出部位在SVC快速性心律失常期间的信息有限。
使用非接触式三维标测系统对2例SVC心动过速患者的电生理机制和消融策略进行了详细的特征描述。第一例显示SVC心动过速起源于SVC内的一个异位灶，伴有持续的去极化并传导至心房。横跨SVC-RA交界处的进出部位彼此非常靠近。第二例显示了两个不同的折返环，一个在SVC内，另一个进出SVC-RA交界处。进出部位彼此相距较远。
非接触式标测可能有助于揭示SVC快速性心律失常的机制，并定位SVC-RA交界处的进出部位，作为导管消融的指导。
