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Atrioventricular Sequential Pacing and Pacemakers

1973; Elsevier BV; Volume: 63; Issue: 5 Linguagem: Inglês

10.1378/chest.63.5.783

1931-3543

Seymour Furman, Henrietta Reicher-Reiss, Doris J.W. Escher,

Neurological disorders and treatments

Marked symptomatic sinus bradycardia was treated by permanent pervenous Bifocal (sequential atrioventricular) demand pacemaker (BFD) implantation in four patients. The specific mode of operation and the complications encountered are analyzed. In the group of implants, six different BFD pulse generators were used; two of these generators underwent premature battery failure, one developed runaway and a fourth, premature circuit instability. Improper position or later displacement of the J-shaped atrial electrode prompted a special problem—ventricular stimulator inhibition. This self-inhibition is unique to this variety of generator and requires repositioning of the atrial electrode. The longterm high drain of energy and the electrical instability of the pulse generator are problems remaining to be solved before this mode of pacing can reach its full potential use. Marked symptomatic sinus bradycardia was treated by permanent pervenous Bifocal (sequential atrioventricular) demand pacemaker (BFD) implantation in four patients. The specific mode of operation and the complications encountered are analyzed. In the group of implants, six different BFD pulse generators were used; two of these generators underwent premature battery failure, one developed runaway and a fourth, premature circuit instability. Improper position or later displacement of the J-shaped atrial electrode prompted a special problem—ventricular stimulator inhibition. This self-inhibition is unique to this variety of generator and requires repositioning of the atrial electrode. The longterm high drain of energy and the electrical instability of the pulse generator are problems remaining to be solved before this mode of pacing can reach its full potential use.