Circulation. Arrhythmia and electrophysiology
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Circ Arrhythm Electrophysiol · Jun 2013
Comparative StudyOutcome of ventricular tachycardia ablation in patients with nonischemic cardiomyopathy: the impact of noninducibility.
Ablation failure and recurrence rates after ventricular tachycardia (VT) ablation in nonischemic cardiomyopathy are high and the optimal procedural end point is not well defined. This study assessed the outcome after ablation, the impact of noninducibility, and other potential predictors of VT recurrence. ⋯ Although 53% of patients had VT during follow-up, the 6-month VT burden was decreased by ≥75% in 79%. Recurrence rates are low after complete procedural success, but high after both partial success and failure. Non-complete procedural success was the strongest predictor of VT recurrence.
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Circ Arrhythm Electrophysiol · Jun 2013
Comparative StudyNonpharmacologic control of postoperative supraventricular arrhythmias using AV nodal fat pad stimulation in a young animal open heart surgical model.
Supraventricular arrhythmias (junctional ectopic tachycardia [JET] and atrial tachyarrhythmias) frequently complicate recovery from open heart surgery in children and can be difficult to manage. Medical treatment of JET can result in significant morbidity. Our goal was to develop a nonpharmacological approach using autonomic stimulation of selective fat pad (FP) regions of the heart in a young canine model of open heart surgery to control 2 common postoperative supraventricular arrhythmias. ⋯ Right inferior FP stimulation had a selective effect on the AV node, and slowed the ventricular rate during postoperative JET and atrial tachyarrhythmias in our young canine open heart surgery model. FP stimulation may be a useful new technique for managing children with JET and atrial tachyarrhythmias.
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Circ Arrhythm Electrophysiol · Apr 2013
Randomized Controlled Trial Multicenter Study Comparative StudyPulmonary antrum radial-linear ablation for paroxysmal atrial fibrillation: interim analysis of a multicenter trial.
Substrate abnormality in pulmonary vein (PV) antrum plays a critical role in mechanism of atrial fibrillation (AF). The present study compares the strategy of PV antrum radial-linear (PAR) ablation to encircling PV isolation for paroxysmal AF. ⋯ URL: http://www.chictr.org; Unique identifier: ChiCTR-TRC-11001191.
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Circ Arrhythm Electrophysiol · Apr 2013
Comparative StudyEffects of obstructive sleep apnea and its treatment on signal-averaged P-wave duration in men.
Prolonged P-wave duration, indicating atrial conduction delay, is a potent precursor of atrial fibrillation. Obstructive sleep apnea (OSA) is a risk factor for atrial fibrillation development. We investigated the association of P-wave duration with OSA and its treatment. ⋯ OSA severity was significantly associated with prolonged SAPWD. CPAP therapy significantly shortened SAPWD in patients with moderate-to-severe OSA. Thus, OSA may cause atrial conduction disturbances, leading to an increased risk of atrial fibrillation development, which may be modifiable by alleviating OSA with CPAP therapy.