Tomonori Watanabe

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BACKGROUND Radiofrequency applications around pulmonary vein (PV) ostia often induce vagal reflexes. OBJECTIVE This study aimed to evaluate the impact of the order of the targeted PV on the vagal response during second-generation cryoballoon ablation. METHODS Eighty-one consecutive paroxysmal atrial fibrillation (AF) patients undergoing cryoballoon(More)
Unilateral choanal atresia is a congenital problem initially observed by the otolaryngologist as unilateral nasal obstruction. Elective surgical correction can be done using the transnasal, transpalatal, transantral, or transseptal techniques. Two patients underwent this procedure with the transseptal technique. We believe this is a safe, uncomplicated, and(More)
BACKGROUND Monitoring luminal esophageal temperatures (LETs) helps predict esophageal thermal lesions (ETLs) after catheter ablation. This study aimed to evaluate esophagus-related complications after second-generation cryoballoon ablation under simultaneous LETs monitoring from 2 esophageal probes. METHODS Forty consecutive paroxysmal atrial fibrillation(More)
BACKGROUND Achieve catheters are cryoballoon guidewires that enable pulmonary vein (PV) potential mapping. The single catheter approach in conjunction with the Achieve catheter is currently standard practice in second-generation cryoballoon ablation, yet circumferential mapping catheters are the gold standard for evaluating PV isolation (PVI). The study(More)
BACKGROUND Few data are available on gastric hypomotility (GH) after cryoballoon pulmonary vein isolation. Also, the use of esophageal temperature monitoring for the prevention of endoscopically detected esophageal lesions (EDELs) is not well established. OBJECTIVE The purpose of this study was to investigate GH and the impact of an esophageal probe on(More)
The feasibility of cryoballoon ablation for treating paroxysmal atrial fibrillation (AF) has been reported. On the other hand, several complications specific to ablation using a cryoballoon may be expected. The prior reports of coronary spasms during procedures describe some mechanisms of coronary spasms; however, those mechanisms remain unknown. We(More)
BACKGROUND Circulatory dynamics change during pulmonary vein (PV) isolation using cryoballoons. This study sought to investigate the circulatory dynamics during cryoballoon-based PV isolation procedures and the contributing factors. METHODS AND RESULTS This study retrospectively included 35 atrial fibrillation patients who underwent PV isolation with(More)
BACKGROUND The intrinsic cardiac autonomic nervous system (ANS) plays a significant role in atrial fibrillation (AF) mechanisms. This study evaluated the incidence and impact of intraprocedural vagal reactions and ANS modulation by pulmonary vein isolation (PVI) using second-generation cryoballoons on outcomes. METHODS One hundred three paroxysmal AF(More)
A discrete prepotential with an isoelectric segment could be recorded at the successful ablation site in patients with outflow tract ventricular arrhythmias (OT-VAs). A prior report showed that the site of a discrete prepotential with an activation time of Z50 milliseconds in the coronary cusps may indicate a successful ablation site of an OT-VA. However,(More)
BACKGROUND Optimal freeze doses are unknown during cryothermal cavo-tricuspid isthmus (CTI) ablation. This study aimed to evaluate the feasibility of 2-minute freeze doses for CTI ablation. METHODS Forty-eight consecutive patients undergoing cryothermal CTI ablation following pulmonary vein isolation were enrolled. CTI ablation was performed with 2-minute(More)