Landzberg J S, Franklin J O, Langberg J J, Herre J M, Scheinman M M, Schiller N B
Department of Medicine, University of California, San Francisco.
J Am Coll Cardiol. 1988 Sep;12(3):753-6. doi: 10.1016/0735-1097(88)90317-8.
The ability to localize catheters within the heart has gained importance with the use of percutaneous catheter ablation and the transseptal approach for valvuloplasty. A prototype interactive transponder catheter system, specifically designed to mark the catheter tip for echocardiographic visualization, was used to place catheters at the tricuspid anulus and the fossa ovalis in anesthetized dogs. Catheter tip location was marked by lesions produced by radiofrequency energy delivered at the distal catheter electrode. At autopsy, the center of the radiofrequency-induced lesion was located 2.8 +/- 0.7 mm from the edge of the lateral tricuspid anulus and 3.5 +/- 3.1 mm from the center of the fossa ovalis. The transponder catheter system offers the ability to precisely position catheters in the right atrium under echocardiographic guidance.
随着经皮导管消融术和经间隔瓣膜成形术的应用，将导管定位在心脏内的能力变得愈发重要。一种专门设计用于标记导管尖端以便超声心动图可视化的交互式应答器导管系统原型，被用于在麻醉犬的三尖瓣环和卵圆窝处放置导管。通过在导管远端电极施加射频能量产生的损伤来标记导管尖端位置。尸检时，射频诱导损伤的中心距离三尖瓣环外侧边缘2.8±0.7毫米，距离卵圆窝中心3.5±3.1毫米。应答器导管系统能够在超声心动图引导下将导管精确地放置在右心房内。
