Key result
Intact ventriculo-atrial conduction linked to ~75% rate of inducible pacemaker-mediated tachycardias during ventricular extrastimulation.
Why the study?
Factors influencing initiation and perpetuation of pacemaker-mediated tachycardias (PMTs) in patients with AV universal (DDD) pulse generators were not fully understood.
Does programmed single ventricular extrastimulation initiate pacemaker-mediated tachycardias in patients with symptomatic conduction disorders and a DDD pulse generator?
Observational (n=22)
Does programmed single ventricular extrastimulation initiate pacemaker-mediated tachycardias in patients with symptomatic conduction disorders and a DDD pulse generator?
Absolute Event Rate: 75% vs 0%
Initiation of pacemaker-mediated tachycardias in DDD pacemakers depends on retrograde VA conduction and programmable parameters, highlighting the need for device refinement.
No takes yet. Share an insight, caveat, or question.
VA conduction may facilitate PMT initiation by ventricular extrastimuli; leaves open whether VA testing should guide device programming.
Mechelen et al. (1984) conducted an observational in Symptomatic conduction disorders (n=22). Presence of ventriculo-atrial (VA) conduction vs. Absence of ventriculo-atrial (VA) conduction was evaluated on Initiation of pacemaker-mediated tachycardias (PMTs). Pacemaker-mediated tachycardias were initiated by programmed ventricular extrastimuli in 75% (6/8) of patients with ventriculo-atrial conduction versus 0% (0/14) of those without it.
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