| Popis: |
A widespread use of P-synchronous pacing became possible in the mid to late 1970s, although that system was available from the early 1960s as VAT mode [1]; at that time, in fact, this mode of pacing required two leads, one to sense atrial depolarization and the other to pace the ventricle, but the insertion of two leads through a single vein was very difficult because of the limited lead technology. The development of a system able to assure a reliable AV synchrony via a single AV lead would have been the ideal solution to the problems of implant, simplifying the venous approach and representing a suitable treatment for patients with complete AV block (CHB) and normal sinoatrial function (SAF) who do not require atrial pacing. |
