Key result
Atrial pacing-induced infrahisal AV block in patients with chronic BBB and syncope predicted a higher rate of spontaneous second- or third-degree AV block (78% vs 9%, P<0.001).
Why the study?
Does atrial pacing induced nonfunctional infrahisal second-degree AV block predict the development of spontaneous second- or third-degree AV block in patients with chronic bundle branch block and syncope?
Population
192 patients with chronic bundle branch block (BBB) and syncope
Comparison
Atrial pacing induced nonfunctional infrahisal… vs Normal response to atrial pacing (Group I, n=174)
Design
Cohort
Follow-up
mean 65 +/- 34 months for group I, and 68 +/- 35 months…
Authors
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May flag high-risk syncope patients with BBB for monitoring; leaves open pacing decisions pending prospective validation.
Cohort (n=192)
Does atrial pacing induced nonfunctional infrahisal second-degree AV block predict the development of spontaneous second- or third-degree AV block in patients with chronic bundle branch block and syncope?
Absolute Event Rate: 78% vs 9%
p-value: p=<0.001
In patients with chronic bundle branch block and syncope, pacing-induced infrahisal AV block identifies a high-risk group for spontaneous AV block, indicating a need for permanent pacing.
Petrač et al. (1996) conducted a cohort in Chronic bundle branch block (BBB) and syncope (n=192). Atrial pacing induced nonfunctional infrahisal second-degree AV block vs. Normal response to atrial pacing was evaluated on Development of spontaneous second- or third-degree AV block (p=<0.001). Atrial pacing-induced infrahisal AV block in patients with chronic BBB and syncope predicted a higher rate of spontaneous second- or third-degree AV block (78% vs 9%, P<0.001).
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