title: VDD pacing with a previously implanted single lead system.
abstract: Three patients who had undergone implantation of a rate modulated, atrial sensitive RS4 pacemaker, with a single orthogonal lead underwent replacement of a depleted unit with a DDD pulse generator, reusing the original lead with an adapter that allowed conversion of the bipolar atrial electrode into unipolar configuration. The mean atrial electrogram amplitude was 1.8 mV and no significant atrial sensing defects were found during Holter monitoring. As the RS4 pulse generator is no longer available, continued VDD pacing is possible by replacing it with a DDD pulse generator using the previously implanted single lead system.
authors.affiliation: Department of Cardiology, Juntendo University, School of Medicine, Tokyo, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Nakata
authors.forename: S
authors.initials: S
authors.lastname: Ogura
authors.forename: T
authors.initials: T
authors.lastname: Tokano
authors.forename: M
authors.initials: M
authors.lastname: Yasuda
authors.forename: Y
authors.initials: Y
authors.lastname: Ohno
authors.forename: T
authors.initials: T
authors.lastname: Hisaoka
authors.forename: M
authors.initials: M
authors.lastname: Sumiyoshi
authors.forename: Y
authors.initials: Y
authors.lastname: Nakazato
authors.forename: H
authors.initials: H
authors.lastname: Yamaguchi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D015716:Electrocardiography, Ambulatory; D004567:Electrodes, Implanted; D005260:Female; D005500:Follow-Up Studies; D006327:Heart Block / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D013997:Time Factors