K
Koichi Nagashima
Researcher at Nihon University
Publications - 4
Citations - 421
Koichi Nagashima is an academic researcher from Nihon University. The author has contributed to research in topics: Catheter ablation & Ventricular tachycardia. The author has an hindex of 3, co-authored 4 publications receiving 320 citations. Previous affiliations of Koichi Nagashima include Dokkyo Medical University & Harvard University.
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Journal ArticleDOI
Freedom from recurrent ventricular tachycardia after catheter ablation is associated with improved survival in patients with structural heart disease: An International VT Ablation Center Collaborative Group study
Roderick Tung,Marmar Vaseghi,David S. Frankel,Pasquale Vergara,Luigi Di Biase,Koichi Nagashima,Ricky Yu,Sitaram Vangala,Chi-Hong Tseng,Eue Keun Choi,Shaan Khurshid,Mehul Patel,Nilesh Mathuria,Shiro Nakahara,Wendy S. Tzou,William H. Sauer,Kairav Vakil,Usha B. Tedrow,J. David Burkhardt,Venkatakrishna N. Tholakanahalli,Anastasios Saliaris,Timm Dickfeld,J. Peter Weiss,T. Jared Bunch,Madhu Reddy,Arun Kanmanthareddy,David J. Callans,Dhanunjaya Lakkireddy,Andrea Natale,Francis E. Marchlinski,William G. Stevenson,Paolo Della Bella,Kalyanam Shivkumar +32 more
TL;DR: Catheter ablation of VT in patients with structural heart disease results in 70% freedom from VT recurrence, with an overall transplant and/or mortality rate of 15% at 1 year, which is associated with improved transplant-free survival, independent of heart failure severity.
Journal ArticleDOI
Ventricular Tachycardia Ablation in Severe Heart Failure: An International Ventricular Tachycardia Ablation Center Collaboration Analysis.
Wendy S. Tzou,Roderick Tung,David S. Frankel,Marmar Vaseghi,T. Jared Bunch,Luigi Di Biase,Venkatakrishna N. Tholakanahalli,Dhanunjaya Lakkireddy,Timm Dickfeld,Anastasios Saliaris,J. Peter Weiss,Nilesh Mathuria,Usha B. Tedrow,Mohammed R. Afzal,Pasquale Vergara,Koichi Nagashima,Mehul Patel,Shiro Nakahara,Kairav Vakil,J. David Burkhardt,Chi-Hong Tseng,Andrea Natale,Kalyanam Shivkumar,David J. Callans,William G. Stevenson,Paolo Della Bella,Francis E. Marchlinski,William H. Sauer +27 more
TL;DR: Despite greater baseline comorbidities, VT radiofrequency ablation can be safely performed among New York Heart Association class IV (NYHA IV) heart failure patients, and early VT recurrence is significantly associated with subsequent mortality regardless of NYHA status.
Journal ArticleDOI
Ventricular Tachycardia Ablation in the Elderly: An International Ventricular Tachycardia Center Collaborative Group Analysis.
Kairav Vakil,Santiago Garcia,Roderick Tung,Marmar Vaseghi,Usha B. Tedrow,Paolo Della Bella,David S. Frankel,Pasquale Vergara,Luigi Di Biase,Koichi Nagashima,Shiro Nakahara,Wendy S. Tzou,J. David Burkhardt,Timm Dickfeld,J. Peter Weiss,Jared Bunch,David J. Callans,Dhanunjaya Lakkireddy,Andrea Natale,William H. Sauer,William G. Stevenson,Francis E. Marchlinski,Kalyanam Shivkumar,Venkatakrishna N. Tholakanahalli +23 more
TL;DR: VT ablation in the elderly is feasible and reasonably safe with a modestly higher in-hospital and 1-year mortality, with similar rates of VT recurrence at 1 year compared with younger patients.
Journal ArticleDOI
One electrogram-tracing tells all: What is the mechanism of this supraventricular tachycardia?
Moyuru Hirata,Yuji Wakamatsu,Koichi Nagashima,Sayaka Kurokawa,Naoto Otsuka,Seina Yagyu,Shu Hirata,Toshiko Nakai,Yasuo Okumura +8 more
TL;DR: One Electrogram-Tracing Tells All: what is the mechanism of supraventricular tachycardia? as mentioned in this paper showed that narrow QRS tachycaemia is caused by the accessary pathway.