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Upper Pulmonary Vein (upper + pulmonary_vein)
Selected AbstractsDistinguishing Far-Field Appendage from Local Pulmonary Vein Signal in the Left Upper Pulmonary Vein During Atrial TachycardiaJOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, Issue 4 2010EDWARD DUNCAN Ph.D. First page of article [source] Temperature-Sensitive Focal Atrial Tachycardia in the Left AtriumJOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, Issue 3 2000G. ANDRÉ NG M.B.CH.B., Ph.D. Temperature-Sensitive Focal Atrial Tachycardia. Temperature sensitivity has not been reported in focal atrial tachycardia. We describe a patient with a left atrial tachycardia whose tachycardia rate was affected by hot and cold drinks. The elTects were still evident after autonomic blockade. The arrhythmia focus was located at the entrance of the left upper pulmonary vein. Radiofrequency ablation was carried out, which proved to be difficult, but it was successful after several applications of energy, suggesting an epicardial location of the arrhytbmia focus. Sensitivity of atrial tachycardia rate to the temperature of food or drink ingested suggests a left atrial focus with a posterior and possibly epicardial location. [source] Esophageal Acid Levels after Pulmonary Vein Isolation for Atrial FibrillationPACING AND CLINICAL ELECTROPHYSIOLOGY, Issue 2009GEORG NÖLKER M.D. Background: Pulmonary vein antrum isolation (PVAI) is a potentially curative, nonpharmacologic treatment of atrial fibrillation (AF). Several procedural complications have been described, including esophageal wall lesions ranging from erythema and esophagitis, necrosis and ulcer, to atrio-esophageal fistula. We prospectively studied changes in esophageal acid levels before and after PVAI. Methods: We performed 24-hour pH-metry before and 1.3 ± 1.6 days after PVAI, in 25 patients (mean age = 62 ± 12 years, 17 men) with symptomatic AF. A 2-mm transnasal probe was inserted into the inferior part of the esophagus and into the stomach to measure pH levels at fixed intervals. DeMeester scores, indicating acidic gastro-esophageal reflux, were calculated. Results: The mean number of reflux episodes increased from 89 ± 80 before to 107 ± 94 after PVAI. The mean percentage of time with esophageal pH < 4 was shorter after (108 ± 193 minutes) than before PVAI (159 ± 245 minutes). The mean DeMeester score decreased from 49 ± 68 before to 31 ± 41 after PVAI (P < 0.05). We observed erythema or esophagitis in five patients, necrosis or ulcer in seven, and atrio-esophageal fistula in no patient. Conclusions: Our hypothesis of increased acid levels caused by stimulation of the right vagal nerve during isolation of the right upper pulmonary vein was not verified. [source] Termination of Persistent Atrial Fibrillation Resistant to Cardioversion by a Single Radiofrequency ApplicationPACING AND CLINICAL ELECTROPHYSIOLOGY, Issue 6 2003BENGT HERWEG This report describes the termination of persistent AF refractory to multiple cardioversions and antiarrhythmic therapy in a patient without structural heart disease, with a single radiofrequency application delivered in the left upper pulmonary vein. The observations and failure of repeated internal and external cardioversion suggest a rapidly firing arrhythmia focus sustaining atrial fibrillation amenable to curative pulmonary vein ablation. (PACE 2003; 26:1420,1423) [source] | ||||||||||