Key result
Replacing a depleted RS4 pacemaker with a DDD pulse generator using the previously implanted single lead system allowed continued VDD pacing with a mean atrial electrogram amplitude of 1.8 mV.
Why the study?
Does replacing a depleted RS4 pulse generator with a DDD pulse generator using the original single lead system and an adapter allow for continued VDD pacing?
Case Report (n=3)
Does replacing a depleted RS4 pulse generator with a DDD pulse generator using the original single lead system and an adapter allow for continued VDD pacing?
Continued VDD pacing is feasible by replacing an obsolete RS4 pulse generator with a DDD pulse generator using the previously implanted single lead system and an adapter.
Answers are grounded in this paper and cite their sources.
May enable continued VDD pacing without new leads in select RS4 cases; leaves open reliability and generalizability.
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.
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Nakata et al. (1992) conducted a case report in Depleted RS4 pacemaker unit (n=3). Replacement with a DDD pulse generator reusing the original lead with an adapter was evaluated on Mean atrial electrogram amplitude and atrial sensing defects during Holter monitoring. Replacing a depleted RS4 pacemaker with a DDD pulse generator using the previously implanted single lead system allowed continued VDD pacing with a mean atrial electrogram amplitude of 1.8 mV.
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