Key result
Ventriculoatrial conduction was demonstrated in 31% of patients with sick sinus syndrome compared to 11% of patients with atrioventricular block.
Why the study?
Does the frequency and clinical significance of ventriculoatrial conduction differ between patients with sick sinus syndrome and atrioventricular block?
Observational (n=152)
No
Does the frequency and clinical significance of ventriculoatrial conduction differ between patients with sick sinus syndrome and atrioventricular block?
Absolute Event Rate: 31% vs 11%
Ventriculoatrial conduction is more frequent in sick sinus syndrome than in AV block and may contribute to the development of atrial fibrillation and pacemaker-mediated tachycardia, highlighting the need to evaluate VAC before selecting pacing modes.
May inform pacing decisions in sick sinus syndrome; leaves open causal arrhythmia links without prospective confirmation.
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Yuji Nakazato (1986) conducted an observational in Sick Sinus Syndrome and Atrioventricular Block (n=152). Sick sinus syndrome vs. Atrioventricular block was evaluated on Presence of ventriculoatrial conduction (VAC). Ventriculoatrial conduction was demonstrated in 31% of patients with sick sinus syndrome compared to 11% of patients with atrioventricular block.
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