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BACKGROUND Atrial tachycardia (AT) that develops after ablation of atrial fibrillation often poses a more difficult clinical situation than the index arrhythmia. This study details the use of an impedance-based electroanatomic mapping system (Ensite NavX) in concert with a specialized multielectrode mapping catheter for rapid, high-density atrial mapping.(More)
STUDY OBJECTIVES The single-breath diffusing capacity of the lung (DLCO) is a commonly performed pulmonary function test. The current American Thoracic Society (ATS) recommendations for reproducibility of DLCO measurements suggest that two measurements for the DLCO agree within 10% or 3 mL/min/mm Hg of the average value. The European Respiratory Society(More)
Metastatic spread to subcarinal lymph nodes in patients with bronchogenic carcinoma generally indicates unresectability. Transcarinal needle aspiration of the main carina (TCNA) has been used to obviate the need for more invasive procedures, particularly thoracic surgery. Of 510 transbronchial needle aspirations performed at our institution from 1983 to(More)
Patients with methadone-induced long-QT syndrome may experience Torsades de Pointes (TDP) or aborted sudden death requiring the placement of implantable cardioverter-defibrillators (ICDs). Outcomes after ICD implantation in these patients are unknown. Eight patients presenting with methadone-induced long-QT syndrome and episodes of symptomatic TDP were(More)
BACKGROUND Although the subcutaneous ICD (S-ICD®) is an attractive alternative in patients with end-stage renal disease (ESRD), data on S-ICD outcomes in dialysis patients are lacking. METHODS Patients with cardiomyopathy undergoing S-ICD implantation in our center were stratified by need for chronic dialysis at the time of implant. The primary endpoint(More)
We report the case of a double-chambered right ventricle in a 59-year-old man with previously undiagnosed Noonan syndrome. The patient presented with dyspnea on exertion and his transthoracic echocardiogram suggested a right ventricular outflow tract obstruction. Cardiac catheterization, cardiac magnetic resonance imaging, and transesophageal(More)
BACKGROUND Atrial fibrillation (AF) prevalence increases significantly with age. Little is known about the effect of AF ablation on quality of life and healthcare utilization in the elderly. The objective of this study was to quantify the healthcare utilization and quality of life benefits of catheter ablation for AF, for patients ≥65 years compared to(More)
INTRODUCTION This report presents safety data on the use of a new open-irrigation radiofrequency ablation (RFA) catheter with a 56-hole porous tip in 742 patients enrolled in 2 US prospective, multicenter observational registry studies representing real-world use of the catheter. METHODS This analysis is comprised of patients who underwent RFA of(More)
OBJECTIVES This study compared risks associated with magnetic resonance imaging (MRI) in patients with non-MRI conditional and MRI conditional pacing and defibrillator systems with particular attention to clinically actionable outcomes. BACKGROUND While recipients of new MRI conditional pacemaker and defibrillator systems may undergo MRI scanning with(More)
INTRODUCTION Magnetic resonance (MR) imaging of the left atrium (LA) can be integrated with electroanatomic mapping systems to guide catheter ablation of atrial fibrillation (AF). The usefulness of this technique is dependent on the accuracy of image integration. OBJECTIVE The aim of this study is to determine the effect of heart rhythm at the time of(More)