Transseptal left heart catheterization using newly devised low-invasive catheter systems.

为了更安全地进行经间隔左心导管术，防止严重的并发症，如心脏填塞，我们设计了几种更薄的导管系统。它们分别是3法尺导管系统，4法尺导管系统，5法尺导管系统和6法尺导管系统。除3个french -size系统外，其余系统均由各尺寸的间隔导管、新型0.032 inch的间隔针和新型0.018 inch的间隔导丝组成。3法径导管可方便、安全地进行经间隔左房置管，但3法径导管不能经二尖瓣进入左心室。由Mallincklodt高流量导管制成的新设计的4法国大小的跨隔膜系统，可以安全地通过房隔和二尖瓣进入左心室。但它的导管尖端摩擦了心室壁导致了室性早搏的发生。这个法国大小的气球末端系统不能通过二尖瓣进入左心室。新设计的6法国大小的系统，在导管尖端有气球，可以通过二尖瓣进入左心室。球囊的形成使导管系统更容易进入左心室，并使室性早搏的频率降低。我们认为，使用我们新设计的6法国大小的球囊导管经间隔导管置入比传统的经间隔入路更安全、更有用。

In order to perform the transseptal left heart catheterization more safely preventing severe complications such as cardiac tamponade, we have devised several thinner catheter systems for the procedure. They were the transseptal catheter system of 3 French-size, the system of 4 French-size, the system of 5 French-size and the system of 6 French-size. All of them except the 3 French-sized system consisted of the each sized transseptal catheter, the new transseptal needle of 0.032 inch size and the new transseptal guide-wire of 0.018 inch size. Transseptal left atrial catheterizasion could be done with the 3 French-sized system easily and safely, but the 3 French-sized catheter could not be introduced into the left ventricle through the mitral vulve. The newly devised 4 French-sized transseptal system, made from Mallincklodt high flow catheter, could be introduced into the left ventricle through the atrial-septum and the mitral vulve safely. But it's catheteral tip rubbed the ventricular wall and caused the occurrence of the PVCs. The balloon-tipped 5 French-sized system could not be passed into the left ventricle throgh the mitral valve. The newly designed 6 French-sized system, had the balloon at their catheteral tips, could be introduced into the left ventricle transseptlly through the mitral vulve. The balloon formation made the introduction of the catheter system into the left ventricle easier, and made the frequency of the PVCs lower. We believe that the transseptal catheterization using our newly devised 6 French-sized system, made of a balloon catheter, is safer and more useful than the conventional transseptal approach.