Abstract
Since 1965, 285 patients have been operated on artificial pacemaker implantation, and 134 patients with a endocardial pacemaker lead were subjected to this comparative study dividing into 3 groups; with the flange tipped, the non-flange tipped and the ring tipped tined.
At initial implantation, stimulating voltage threshold of the ring tipped tined lead, 8mm2 in electrode surface area, averaged 0.61±0.17V. This value was significantly low in comparison with that of an old type of the falnge tipped lead. The sensing threshold of the former was superior, also. On venous insertion, little technical difficulty has been encountered with tines being folded, 3.0 to 3.3mm in lead diameter. The incidences of postoperative lead dislocation of the flange tipped, the non-flange tipped, and the ring tipped tined leads were 11.70, 9.1% and 4.5%, respectively.
From these results, the ring tipped tined lead is our choice of an endocardial pacemaker lead at present. However, removal of the lead may not be enabled, and some measures in such cases as pacemaker infection, would be devised.
