Ryuta Watanabe

Irrigation-dependent acute ganglionated plexus modulation during variable-loop pulsed field ablation

Masanaru Sawada, Koichi Nagashima, Ryuta Watanabe, Yuji Saito et autres

CLINICAL TRIAL REGISTRATION: UMIN Clinical Trials Registry, UMIN000057894.

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Accurate Diagnosis of Atrioventricular Nodal Reentrant Tachycardia With Very Short His‐Atrial Interval and Earliest Activation in the Proximal Coronary Sinus

Yuji Wakamatsu, Shu Hirata, Koichi Nagashima, Hitoshi Mori et autres

INTRODUCTION: Differential diagnoses in atrioventricular nodal reentrant tachycardia (AVNRT) with His-atrial (HA) interval of < 70 ms and earliest atrial activation site (EAAS) in the proximal coronary sinus (pCS) include slow-fast AVNRT with inferior deviation of the fast pathway (FP) and slow-slow …

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Pseudo-Hypertrophy

Kenichi Inoue, Takumi Hatta, Ryuta Watanabe, Keisuke Kojima et autres

Figure 1.Multimodality imaging illustrating the pseudo-hypertrophy pitfall on admission.A, B: Transthoracic echocardiography (TTE) in the apical four-chamber and short-axis views demonstrates apparent massive thickening of the interventricular septum (white arrows).C, D: Coronary CT angiography shows a severely hypoperfused area in the corresponding …

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Catheter Impaction After Pericardial Drainage Due to Inadvertent Entry Into the Transverse Pericardial Sinus

Tetsuro Nagao, Riku Arai, Shu Hirata, Koichiro Hori et autres

BACKGROUND: Pericardial drainage is a lifesaving intervention for cardiac tamponade. Difficulty in catheter removal is rare and is typically attributed to thrombus formation or pericardial adhesions. CASE SUMMARY: A 66-year-old woman developed cardiac tamponade after cryoablation for atrioventricular nodal reentrant tachycardia. Subxiphoid …

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Clinical Significance of Patient Disease Awareness in Atrial Fibrillation: Risk Profiles and Post‐Ablation Outcomes

Masanaru Sawada, Naoto Otsuka, Koichi Nagashima, Ryuta Watanabe et autres

ABSTRACT Background The clinical relevance of patient disease awareness on risk factor control and clinical outcomes after atrial fibrillation (AF) ablation remains incompletely understood. Methods We conducted a prospective cohort study enrolling 133 patients undergoing an initial AF ablation. Disease awareness was …

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PO-FPI-295 MRI-DEFINED CHRONIC PFA LESIONS ARE DURABLE AND UNIFORM REGARDLESS OF CATHETER TYPE OR OPERATOR, WHEREAS RECURRENCE REFLECTS ATRIAL SUBSTRATE

Ryuta Watanabe, Koichi Nagashima, Masato Sakaki, A. Matsushima et autres

First multicenter Japanese registry on tissue proximity-guided pulsed field ablation: Procedural safety and mid-term outcomes

Masanaru Sawada, Hirotsugu Sato, Koichi Nagashima, Ryuta Watanabe et autres

Background Pulsed field ablation (PFA) is a novel therapy for atrial fibrillation (AF) with myocardial selectivity and safety. The VARIPULSE catheter (variable-loop circular catheter [VLCC]; Biosense Webster, Inc.) was recently introduced in Japan, but multicenter real-world data remain scarce. Objective This study …

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Catheter Ablation Outcomes and Life Expectancy in Very Elderly Atrial Fibrillation Patients

Shu Hirata, Yasuo Okumura, Koichi Nagashima, Ryuta Watanabe et autres

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Transmural Lesion Formation by the Fixed-Loop Pulsed Field Ablation Catheter

Tetsuma Kawaji, Ryuta Watanabe, Misaki Naka, Masashi Kato et autres

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An inadequate number of first-line chemotherapy cycles provides poor survival outcomes in patients with metastatic urothelial carcinoma receiving avelumab maintenance: results from the chu-shikoku Japan urological consortium

Satoshi Katayama, Takehiro Iwata, Shingo Nishimura, Kensuke Bekku et autres

PURPOSE: Despite 4-6 cycles of first-line chemotherapy being recommended before the initiation of avelumab maintenance treatment, a non-negligible number of patients received <4 cycles of first-line chemotherapy due to adverse events or pre-existing comorbidities. We assessed the prognostic impact of the number …

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Wall Thickness‐Guided vs. Voltage‐Guided Pulmonary Vein Isolation for Atrial Fibrillation

Moyuru Hirata, Ryuta Watanabe, Koichi Nagashima, Yuji Wakamatsu et autres

ABSTRACT Background The efficacy and safety of tailored pulmonary vein isolation (PVI) guided by either left atrial wall thickness (LAWT) or bipolar voltage remain unclear. Objective The aim of this prospective study was to evaluate the efficacy and safety of each ablation …

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Clinical impact of kidney function in patients with atrial fibrillation receiving oral anticoagulants

Yuki Matsuoka, Daisuke Sakamoto, Akihiro Sunaga, Katsuki Okada et autres

BACKGROUND: Renal function influences the pharmacokinetics of oral anticoagulants in atrial fibrillation (AF), potentially affecting both efficacy and bleeding risk. However, its differential impact across specific agents remains unclear. In this study, we aimed to evaluate the association between renal function and …

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