title: Long term performance of silicone insulated and polyurethane insulated cardiac pacing leads.
abstract: The long term performance of various pacing leads in use for at least one year is reported from one centre. Between January 1975 and December 1990, 1056 cardiac pacing leads were implanted in 881 patients (mean age 57 +/- 13 years). Eight hundred and three leads were silicone insulated (SI) and 253 leads were polyurethane insulated (PUI). Leads from different manufacturers were used (Medtronic, CPI, Telectronics). The average duration of follow up was 56.6 +/- 77 months (range 12-221 months) for SI and 47.1 +/- 24 months (range 12-99 months) for PUI leads. Overall lead failure occurred more often in the PUI group (n = 46, 18.2%) compared to SI group (n = 93, 11.3%, p < 0.025). Majority of lead failures occurred in the first 36 months after implantation. In particular, Medtronic models 6971, 6972 (urethane) and 6901 (silicone) showed higher rate of complications (25.5%, 26.3% and 44.5% respectively).
authors.affiliation: Department of Cardiology, G B Pant Hospital, New Delhi.
authors.forename: K K
authors.initials: KK
authors.lastname: Sethi
authors.forename: N
authors.initials: N
authors.lastname: Pandit
authors.forename: M
authors.initials: M
authors.lastname: Bhargava
authors.forename: J C
authors.initials: JC
authors.lastname: Mohan
authors.forename: R
authors.initials: R
authors.lastname: Arora
authors.forename: M
authors.initials: M
authors.lastname: Khalilullah
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D004567:Electrodes, Implanted; D004868:Equipment Failure; D005260:Female; D005500:Follow-Up Studies; D006327:Heart Block / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D011140:Polyurethanes; D012804:Sick Sinus Syndrome / Q000628:therapy*; D012828:Silicones
chemical_list: D011140:Polyurethanes; D012828:Silicones