The small-tined pacemaker lead--absence of dislodgement.
H Mond, G Sloman
Pacing Clin Electrophysiol | Published : 1980
The Medtronic 6961 unipolar transvenous ventricular lead has four symmetrically placed, small tines that protrude backward just proximal to the tip, and are designed to become entrapped beneath or between right ventricular trabeculae. One hundred leads were implanted. Initially, the leads were more difficult to position at the right ventricular apex as the tines tended to anchor on intracardiac structures. This was overcome by rotating the lead. The time of negotiating the lead from right atrium to right ventricular apex averaged 3.1 minutes for all leads. The first 20 procedures averaged 4.2 minutes and the last 20 averaged 2.1 minutes. In this latter group, 11 of the 20 passages took 60 se..View full abstract