Abstract
New composite cardiac pacing leads, combining the new polyurethane insulator with high flex life multifilar conductor coil made by DBS wires was examined. Clinical evaluations including electrophysiologic ones such as voltage, current and energy thresholds and R wave sensitivity were underwent during acute period after the implantation. Several important andvantages to the pacing system were evidenced,
1. Safe, reliable, smaller diameter was established with stiffer and tougher material of insulator and increased flexual fatigue resistance was remarkable.
2. low dislodgement rate.
3, improved clinical energy efficiency as measured by energy deliverey to the heart tissues.
These advantages act as positive factors to improve lead longevity.
Catheter techniques to lodge it into the right ventricle, on the other hand, becomes more difficult than that previous silicon leads.
