Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology
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We report the case of a 67-year-old woman suffering from Ebstein's disease, who underwent three cardiac operations for bypass, tricuspid prosthesis and pacemaker implantation, and who needed an implantable cardioverter defibrillator for recurrent syncopes related to ventricular tachycardia. Because of the tricuspid prosthesis we chose to implant the defibrillation lead in the inferior vena cava. We collected satisfactory pacing and sensing data and performed a successful defibrillation test during the procedure. This configuration appears to be a safe alternative to conventional implantation in the coronary sinus, as already described in the literature for a few cases.
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Complex fractionated atrial electrogram (CFAE) has been reported to relate to maintain atrial fibrillation (AF). The aims of this study were to investigate the relationship between CFAE and background conditions during sinus rhythm (SR). ⋯ Our results suggest that in paroxysmal and persistent AF with minimally damaged LA, the CFAE sites in patients with AF termination by PVAI alone represent healthy atrial tissue with rapid electrical activity in response to an AF driver located in the pulmonary vein. However, in patients without AF termination, they represent more damaged tissue responsible for maintaining AF.
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This study sought to examine the action potential duration restitution (APDR) property and conduction delay in Brugada syndrome (BrS) patients. A steeply sloped APDR curve and conduction delay are known to be important determinants for the occurrence of ventricular fibrillation (VF). ⋯ Abnormal APDR properties and conduction delay were observed in BrS patients. Both repolarization and depolarization abnormalities are thought to be related to the development of VF in BrS patients.