Junjiroh Koyama

Right atrial rupture due to cardiac angiosarcoma without haemodynamic collapse: a case report of successful multidisciplinary management.

Journal: European heart journal. Case reports

Published: December 08, 2025

Prospective Multicenter Registry to Investigate the Clinical Feasibility of Combination Workflow With 90 W/4 s and Ablation Index-Guided 50 W Ablation (PRECISE-COMBO 90 W/50 W Study).

Journal: Journal of arrhythmia

Published: July 21, 2025

Catheter Ablation Outcomes and Life Expectancy in Very Elderly Atrial Fibrillation Patients: The REHEALTH AF Study.

Journal: JACC. Clinical electrophysiology

Published: July 19, 2025

A case of left atrial thrombus detected by intra-left atrial echocardiography.

Journal: HeartRhythm case reports

Published: April 04, 2025

Global Results of Implantable Loop Recorder for Detection of Atrial Fibrillation After Stroke: Reveal LINQ Registry.

Journal: Journal of the American Heart Association

Published: October 25, 2024

Registry for Evaluating Healthy Life Expectancy and Long-Term Outcomes after Catheter Ablation of Atrial Fibrillation in the Very Elderly (REHEALTH AF) study: rationale and design of a prospective, multicentre, observational, comparative study.

Journal: BMJ open

Published: February 15, 2023

Effect of Catheter Ablation for Atrial Fibrillation in Heart Failure With Mid-Range or Preserved Ejection Fraction　- Pooled Analysis of the AF Frontier Ablation Registry and Hokuriku-Plus AF Registry.

Journal: Circulation journal : official journal of the Japanese Circulation Society

Published: December 04, 2022

Successful defibrillation by modifying from fixed-tilt to tuned-duration defibrillation waveform: When less is more?

Journal: HeartRhythm case reports

Published: October 31, 2022

Initial multicenter clinical experience with the first-generation endoscopic guided laser balloon in Japan.

Journal: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing

Published: August 17, 2022

Inappropriate mode switch and unwarranted right ventricular pacing during atrial fibrillation: Paradoxical atrial undersensing.

Journal: Journal of arrhythmia

Published: August 08, 2022

Defibrillation failure with an electrical short circuit caused by internal insulation breach.

Journal: HeartRhythm case reports

Published: July 26, 2021

Ablation Index-Guided High-Power Radiofrequency Application Shortens the Procedure Time With Similar Outcomes to Conventional Power Application in Atrial Fibrillation Ablation.

Journal: Circulation reports

Published: July 18, 2021

Right atrial rupture due to cardiac angiosarcoma without haemodynamic collapse: a case report of successful multidisciplinary management.

Right atrial rupture due to cardiac angiosarcoma without haemodynamic collapse: a case report of successful multidisciplinary management.

Prospective Multicenter Registry to Investigate the Clinical Feasibility of Combination Workflow With 90 W/4 s and Ablation Index-Guided 50 W Ablation (PRECISE-COMBO 90 W/50 W Study).

Prospective Multicenter Registry to Investigate the Clinical Feasibility of Combination Workflow With 90 W/4 s and Ablation Index-Guided 50 W Ablation (PRECISE-COMBO 90 W/50 W Study).

Catheter Ablation Outcomes and Life Expectancy in Very Elderly Atrial Fibrillation Patients: The REHEALTH AF Study.

Catheter Ablation Outcomes and Life Expectancy in Very Elderly Atrial Fibrillation Patients: The REHEALTH AF Study.

A case of left atrial thrombus detected by intra-left atrial echocardiography.

A case of left atrial thrombus detected by intra-left atrial echocardiography.

Global Results of Implantable Loop Recorder for Detection of Atrial Fibrillation After Stroke: Reveal LINQ Registry.

Global Results of Implantable Loop Recorder for Detection of Atrial Fibrillation After Stroke: Reveal LINQ Registry.

Registry for Evaluating Healthy Life Expectancy and Long-Term Outcomes after Catheter Ablation of Atrial Fibrillation in the Very Elderly (REHEALTH AF) study: rationale and design of a prospective, multicentre, observational, comparative study.

Registry for Evaluating Healthy Life Expectancy and Long-Term Outcomes after Catheter Ablation of Atrial Fibrillation in the Very Elderly (REHEALTH AF) study: rationale and design of a prospective, multicentre, observational, comparative study.

Effect of Catheter Ablation for Atrial Fibrillation in Heart Failure With Mid-Range or Preserved Ejection Fraction - Pooled Analysis of the AF Frontier Ablation Registry and Hokuriku-Plus AF Registry.

Effect of Catheter Ablation for Atrial Fibrillation in Heart Failure With Mid-Range or Preserved Ejection Fraction - Pooled Analysis of the AF Frontier Ablation Registry and Hokuriku-Plus AF Registry.

Successful defibrillation by modifying from fixed-tilt to tuned-duration defibrillation waveform: When less is more?

Successful defibrillation by modifying from fixed-tilt to tuned-duration defibrillation waveform: When less is more?

Initial multicenter clinical experience with the first-generation endoscopic guided laser balloon in Japan.

Initial multicenter clinical experience with the first-generation endoscopic guided laser balloon in Japan.

Inappropriate mode switch and unwarranted right ventricular pacing during atrial fibrillation: Paradoxical atrial undersensing.

Inappropriate mode switch and unwarranted right ventricular pacing during atrial fibrillation: Paradoxical atrial undersensing.

Defibrillation failure with an electrical short circuit caused by internal insulation breach.

Defibrillation failure with an electrical short circuit caused by internal insulation breach.

Ablation Index-Guided High-Power Radiofrequency Application Shortens the Procedure Time With Similar Outcomes to Conventional Power Application in Atrial Fibrillation Ablation.

Ablation Index-Guided High-Power Radiofrequency Application Shortens the Procedure Time With Similar Outcomes to Conventional Power Application in Atrial Fibrillation Ablation.

Effect of Catheter Ablation for Atrial Fibrillation in Heart Failure With Mid-Range or Preserved Ejection Fraction　- Pooled Analysis of the AF Frontier Ablation Registry and Hokuriku-Plus AF Registry.

Effect of Catheter Ablation for Atrial Fibrillation in Heart Failure With Mid-Range or Preserved Ejection Fraction　- Pooled Analysis of the AF Frontier Ablation Registry and Hokuriku-Plus AF Registry.