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BACKGROUND Catheter ablation of atrial fibrillation (AF) is complicated by cerebral emboli resulting in acute ischemia. Recently, cerebral ischemic microlesions have been identified with diffusion-weighted magnet resonance imaging (MRI). OBJECTIVE The clinical course and longer-term characteristics of these lesions are not known and were investigated in(More)
BACKGROUND Pulmonary vein isolation (PVI) as a cornerstone for catheter ablation of atrial fibrillation (AF) remains a complex and time-consuming procedure. OBJECTIVE To assess feasibility, safety, and acute efficacy of a novel irrigated multielectrode ablation catheter guided by an electroanatomic mapping system for PVI in patients with paroxysmal AF. (More)
BACKGROUND nMARQ is a multipolar catheter designed to simultaneously ablate at multiple sites around the pulmonary vein (PV) circumference with a single radiofrequency application. We sought to define the safety and efficacy of atrial fibrillation (AF) ablation with the nMARQ catheter. METHODS In a multicenter study, patients with drug-refractory AF were(More)
Electrical storm (ES) is defined as the occurrence of ≥ three distinct episodes of ventricular arrhythmia (VA) in patients with implanted defibrillators within 24 h. Whereas conventional strategies for acute rhythm stabilization may be effective in some patients the occurrence of ES impairs survival and predicts recurrent VA. Catheter ablation in the(More)
OBJECTIVES We compared the safety of different devices by screening for subclinical intracranial embolic events after pulmonary vein isolation with either conventional irrigated radiofrequency (RF) or cryoballoon or multielectrode phased RF pulmonary vein ablation catheter (PVAC). BACKGROUND New devices specifically designed to facilitate pulmonary vein(More)
BACKGROUND The approval of an entirely subcutaneous implantable-cardioverter defibrillator (ICD) system (S-ICD) has raised attention about this promising technology. It was developed to overcome lead failure and infection problems of conventional transvenous ICD systems. Nevertheless, lead migration of the initial design and inappropriate shock rates have(More)
BACKGROUND Neurofilament light chain (NF-L) is the major intermediate filament specifically expressed in neurons and their axons. No data are available concerning serum levels of NF-L after global cerebral ischemia due to cardiac arrest. To find a specific neuronal marker of long-term neurological outcome, we examined serum levels of NF-L in patients after(More)
Insertable cardiac monitor (ICM) increases the detection rate of occult atrial fibrillation (AF) after cryptogenic stroke. The aim of this study was to evaluate the prognostic significance of total atrial conduction time (TACT) assessed by tissue Doppler imaging (PA-TDI interval) to predict AF presence in patients with cryptogenic stroke. Ninety patients(More)
AIMS To assess the relation between left atrial appendage (LAA) morphology and echocardiographic flow pattern of the LAA by means of two- and three-dimensional transoesophageal echocardiography (3D-TEE). METHODS AND RESULTS In a total of 131 patients with atrial fibrillation, LAA morphology was analyzed by 3D-TEE and classified into four types (Chicken(More)
An electrical storm (ES) is defined as multiple ventricular arrhythmia episodes leading to implantable cardioverter defibrillator interventions. Although conventional rhythm stabilization might be of help acutely, ES involves high mortality and morbidity. We evaluated the effect of catheter ablation strategies in the setting of an interhospital(More)