August 1, 1991Pacing and Clinical Electrophysiology
Pacemaker Syndrome in a Patient with DDD Pacemaker for Long QT Syndrome
Key result
Shortening AV delay resolves pacemaker syndrome by restoring synchrony in an LQTS patient.
- n=1
Why the study?
Does reprogramming AV delay resolve pacemaker syndrome in a patient with long QT syndrome and a DDD pacemaker?
Population
1 patient with long QT syndrome treated with beta blockers and a permanent DDD pacemaker
Comparison
Reprogramming the AV delay to 200 msec vs Initial AV delay programming of 250 msec
Design
Case_report
Follow-up
six months
Authors
Discussion
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Implication
AV delay optimization may prevent pacemaker syndrome from VA conduction in DDD-paced long QT syndrome; single case leaves open generalizability.
Study Design
Type
Case Report (n=1)
Structured PICO
Does reprogramming AV delay resolve pacemaker syndrome in a patient with long QT syndrome and a DDD pacemaker?
P
Population
1 patient with long QT syndrome treated with beta blockers and a permanent DDD pacemaker who developed pacemaker syndrome.
I
Intervention
Reprogramming the AV delay to 200 msec
C
Comparator
Initial AV delay programming of 250 msec
O
Outcome
Resolution of pacemaker syndrome symptoms and restoration of AV synchronypatient reported
In patients with long QT syndrome and a DDD pacemaker, careful programming of the AV delay is necessary to prevent pacemaker syndrome caused by retrograde VA conduction.
Cite This Study
Chien et al. (1991) conducted a case report in Long QT syndrome and pacemaker syndrome (n=1). Reprogramming AV delay to 200 msec vs. AV delay of 250 msec was evaluated on Resolution of pacemaker syndrome symptoms. Reprogramming the AV delay from 250 msec to 200 msec restored AV synchrony and resolved pacemaker syndrome symptoms in a patient with long QT syndrome during 6 months of follow-up.