Journal of the American College of Cardiology
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J. Am. Coll. Cardiol. · Sep 2007
Permanent pacemaker for atrioventricular conduction block after operative repair of perimembranous ventricular septal defect.
This study sought to discover the incidence of permanent pacemaker (PPM) placement for atrioventricular conduction block (AV block) after operative repair of perimembranous ventricular septal defect (PMVSD) in a large multi-institutional database and in the subgroup of patients comparable to those considered for transcatheter device closure of PMVSD. ⋯ Operative AV block and PPM placement occurred in 1.1% of patients in the total group and in 0.8% of patients comparable to those considered for device closure of PMVSD. A PPM placement is more likely in patients with Down syndrome. These data should be considered as devices are developed and in the future when counseling families about options for PMVSD closure.
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J. Am. Coll. Cardiol. · Sep 2007
The role of left atrial muscular bundles in catheter ablation of atrial fibrillation.
We sought to investigate the imaging of the left atrial (LA) muscular bundle and the relationship between the bundle and inducibility of tachyarrhythmia after pulmonary vein isolation (PVI). ⋯ Left atrial muscular bundles may provide a conduction block line and barrier, which is important for the formation of LA flutter/AF after PVI. The noninducibility of LA flutter/AF achieved after additional linear ablation may contribute to a better outcome in RF ablation of paroxysmal atrial fibrillation.