Koichi Nagashima

Publication Activity (10 Years)

Years Active: 2017-2024
Publications (10 Years): 47

Top Topics

Atrial Fibrillation

Idiopathic Pulmonary Fibrosis

Patients Undergoing

Catheter Ablation

Top Venues

Journal of cardiovascular electrophysiology

Journal of arrhythmia

Pacing and clinical electrophysiology : PACE

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

This page only lists publications with an associated author ORCID identifier.

Publications

Koichi Nagashima, Gregory F Michaud, Reginald T Ho, Yasuo Okumura
SVT quest: The adventure diagnosing narrow QRS tachycardia. Journal of arrhythmia 40 (4) (2024)
Koichi Nagashima, Gregory F Michaud, Reginald T Ho, Yasuo Okumura
SVT quest: The adventure diagnosing narrow QRS tachycardia. Journal of arrhythmia 40 (4) (2024)
Koumei Onuki, Koichi Nagashima, Yasuharu Matsunaga-Lee, Masato Fukunaga, Kenichi Hiroshima, Kenji Ando, Melvin M Scheinman
Decremental properties of a concealed nodoventricular pathway. Journal of cardiovascular electrophysiology (2024)
Shu Hirata, Koichi Nagashima, Yoshiaki Kaneko, Shuntaro Tamura, Hitoshi Mori, Suguru Nishiuchi, Michifumi Tokuda, Tetsuma Kawaji, Tatsuya Hayashi, Takuro Nishimura, Masato Fukunaga, Jun Kishihara, Hidehira Fukaya, Jin Teranishi, Mitsuru Takami, Masato Okada, Naoko Miyazaki, Ryuta Watanabe, Yuji Wakamatsu, Yasuo Okumura
Recurrent episodes of atrioventricular nodal reentrant tachycardia: Sites of ablation success, ablation endpoint, and primary culprits for recurrence. Journal of arrhythmia 40 (3) (2024)
Yuji Saito, Koichi Nagashima, Yuji Wakamatsu, Shu Hirata, Ryuta Watanabe, Naoto Otsuka, Moyuru Hirata, Masanaru Sawada, Sayaka Kurokawa, Yasuo Okumura
What is the mechanism of this narrow QRS tachycardia in a patient with type-A Wolff-Parkinson-White (WPW) syndrome? Journal of cardiovascular electrophysiology (2024)
Moyuru Hirata, Koichi Nagashima, Ryuta Watanabe, Yuji Wakamatsu, Shu Hirata, Sayaka Kurokawa, Yasuo Okumura
Where is the gap after a 90 W/4 s very-high-power short-duration ablation of atrial fibrillation?: Association with the left atrial-pulmonary vein voltage and wall thickness. Journal of arrhythmia 40 (2) (2024)
Shu Hirata, Yuji Wakamatsu, Koichi Nagashima, Ryuta Watanabe, Moyuru Hirata, Sawada Masanaru, Yasuo Okumura
Regularly irregular tachycardia: What is the mechanism? Journal of cardiovascular electrophysiology (2024)
Yuji Wakamatsu, Koichi Nagashima, Satoshi Hayashida, Ryuta Watanabe, Shu Hirata, Moyuru Hirata, Masanaru Sawada, Sayaka Kurokawa, Yasuo Okumura
A validation study of the accuracy of the atrial pace map assessed with intracardiac pattern matching: Potential utility of non-pulmonary vein mapping. Pacing and clinical electrophysiology : PACE (2024)
Moyuru Hirata, Koichi Nagashima, Ryuta Watanabe, Yuji Wakamatsu, Shu Hirata, Sayaka Kurokawa, Yasuo Okumura
Where is the gap after a 90 W/4 s very-high-power short-duration ablation of atrial fibrillation?: Association with the left atrial-pulmonary vein voltage and wall thickness. Journal of arrhythmia 40 (2) (2024)
Shu Hirata, Koichi Nagashima, Yoshiaki Kaneko, Shuntaro Tamura, Hitoshi Mori, Suguru Nishiuchi, Michifumi Tokuda, Tetsuma Kawaji, Tatsuya Hayashi, Takuro Nishimura, Masato Fukunaga, Jun Kishihara, Hidehira Fukaya, Jin Teranishi, Mitsuru Takami, Masato Okada, Naoko Miyazaki, Ryuta Watanabe, Yuji Wakamatsu, Yasuo Okumura
Recurrent episodes of atrioventricular nodal reentrant tachycardia: Sites of ablation success, ablation endpoint, and primary culprits for recurrence. Journal of arrhythmia 40 (3) (2024)
Yuji Wakamatsu, Koichi Nagashima, Satoshi Hayashida, Ryuta Watanabe, Shu Hirata, Moyuru Hirata, Masanaru Sawada, Sayaka Kurokawa, Yasuo Okumura
A validation study of the accuracy of the atrial pace map assessed with intracardiac pattern matching: Potential utility of non-pulmonary vein mapping. Pacing and clinical electrophysiology : PACE 47 (8) (2024)
Taiga Honma, Shu Hirata, Koichi Nagashima, Yasuo Okumura
One electrogram tracing tells all: What is the mechanism of this tachycardia and where is the catheter positioned? Journal of cardiovascular electrophysiology (2023)
Koichi Nagashima, Mitsunori Maruyama, Yoshiaki Kaneko, Satoshi Sakai, Takayuki Sekihara, Tetsuma Kawaji, Hidehiro Iwakawa, Yasuyuki Egami, Chisato Ota, Satoshi Nagase, Tetsuo Yagi, Keisuke Suzuki, Hidehira Fukaya, Hironori Nakamura, Hitoshi Mori, Akiko Ueda, Kyoko Soejima, Ryuta Watanabe, Yuji Wakamatsu, Shu Hirata, Moyuru Hirata, Yasuo Okumura
Systematic observation-based diagnosis of atrioventricular nodal reentrant tachycardia with a bystander concealed nodoventricular pathway. Journal of arrhythmia 40 (1) (2023)
Shu Hirata, Koichi Nagashima, Ryuta Watanabe, Yuji Wakamatsu, Yasuo Okumura
Pseudo-slow-fast atrioventricular nodal reentrant tachycardia: Is the fast pathway a criminal or innocent bystander? Journal of arrhythmia 40 (1) (2023)
Yuji Wakamatsu, Koichi Nagashima, Yoshiaki Kaneko, Hitoshi Mori, Kenta Tsutsui, Masaharu Maegaki, Kazumasa Sonoda, Naoto Otsuka, Shu Hirata, Moyuru Hirata, Ritsushi Kato, Naokata Sumitomo, Yasuo Okumura
Novel Ablation Strategy Targeting the Slow Pathway Visualized by Ultrahigh-Resolution Mapping in Typical Slow-Fast Atrioventricular Nodal Reentrant Tachycardia. Circulation. Arrhythmia and electrophysiology (2023)
Masanaru Sawada, Naoto Otsuka, Koichi Nagashima, Ryuta Watanabe, Yuji Wakamatsu, Satoshi Hayashida, Shu Hirata, Moyuru Hirata, Sayaka Kurokawa, Yasuo Okumura
Clinical implication of the patient's disease awareness and adherence to medications in patients undergoing atrial fibrillation ablation. Journal of arrhythmia 40 (1) (2023)
Yuji Wakamatsu, Koichi Nagashima, Yoshiaki Kaneko, Hitoshi Mori, Kenta Tsutsui, Masaharu Maegaki, Kazumasa Sonoda, Naoto Otsuka, Shu Hirata, Moyuru Hirata, Ritsushi Kato, Naokata Sumitomo, Yasuo Okumura
Novel Ablation Strategy Targeting the Slow Pathway Visualized by Ultrahigh-Resolution Mapping in Typical Slow-Fast Atrioventricular Nodal Reentrant Tachycardia. Circulation. Arrhythmia and electrophysiology 16 (3) (2023)
Masanaru Sawada, Naoto Otsuka, Koichi Nagashima, Ryuta Watanabe, Yuji Wakamatsu, Satoshi Hayashida, Shu Hirata, Moyuru Hirata, Sayaka Kurokawa, Yasuo Okumura
Clinical implication of the patient's disease awareness and adherence to medications in patients undergoing atrial fibrillation ablation. Journal of arrhythmia 40 (1) (2023)
Yuji Wakamatsu, Koichi Nagashima, Yoshiaki Kaneko, Hitoshi Mori, Kenta Tsutsui, Masaharu Maegaki, Kazumasa Sonoda, Naoto Otsuka, Shu Hirata, Moyuru Hirata, Ritsushi Kato, Naokata Sumitomo, Yasuo Okumura
Novel Ablation Strategy Targeting the Slow Pathway Visualized by Ultrahigh-Resolution Mapping in Typical Slow-Fast Atrioventricular Nodal Reentrant Tachycardia. Circulation. Arrhythmia and electrophysiology 16 (3) (2023)
Koichi Nagashima, Mitsunori Maruyama, Yoshiaki Kaneko, Satoshi Sakai, Takayuki Sekihara, Tetsuma Kawaji, Hidehiro Iwakawa, Yasuyuki Egami, Chisato Ota, Satoshi Nagase, Tetsuo Yagi, Keisuke Suzuki, Hidehira Fukaya, Hironori Nakamura, Hitoshi Mori, Akiko Ueda, Kyoko Soejima, Ryuta Watanabe, Yuji Wakamatsu, Shu Hirata, Moyuru Hirata, Yasuo Okumura
Systematic observation-based diagnosis of atrioventricular nodal reentrant tachycardia with a bystander concealed nodoventricular pathway. Journal of arrhythmia 40 (1) (2023)
Shu Hirata, Koichi Nagashima, Ryuta Watanabe, Yuji Wakamatsu, Yasuo Okumura
Pseudo-slow-fast atrioventricular nodal reentrant tachycardia: Is the fast pathway a criminal or innocent bystander? Journal of arrhythmia 40 (1) (2023)
Naoto Otsuka, Yasuo Okumura, Sayaka Kuorkawa, Koichi Nagashima, Yuji Wakamatsu, Satoshi Hayashida, Kimie Ohkubo, Toshiko Nakai, Rie Takahashi, Yoshiki Taniguchi
Characteristics of tissue temperature during ablation with THERMOCOOL SMARTTOUCH SF versus TactiCath versus QDOT MICRO catheters (Qmode and Qmode+): An in vivo porcine study. Journal of cardiovascular electrophysiology (2023)
Kazuhisa Matsumoto, Hitoshi Mori, Koichi Nagashima, Yoshiaki Kaneko, Ritsushi Kato
Fast-slow atrioventricular nodal re-entrant tachycardia incorporating superior and inferolateral left atrial slow pathways. Journal of cardiovascular electrophysiology (2023)
Naoto Otsuka, Yasuo Okumura, Sayaka Kuorkawa, Koichi Nagashima, Yuji Wakamatsu, Satoshi Hayashida, Kimie Ohkubo, Toshiko Nakai, Hiroyuki Hao, Rie Takahashi, Yoshiki Taniguchi
In vivo tissue temperatures during 90W/4se c-very high power-short-duration (vHPSD) ablation versus ablation index-guided 50W-HPSD ablation: A porcine study. Journal of cardiovascular electrophysiology (2022)
Naoto Otsuka, Yasuo Okumura, Sayaka Kuorkawa, Koichi Nagashima, Yuji Wakamatsu, Satoshi Hayashida, Kimie Ohkubo, Toshiko Nakai, Hiroyuki Hao, Rie Takahashi, Yoshiki Taniguchi
In vivo tissue temperatures during 90 W/4 sec-very high power-short-duration (vHPSD) ablation versus ablation index-guided 50 W-HPSD ablation: A porcine study. Journal of cardiovascular electrophysiology 34 (2) (2022)
Naoto Otsuka, Yasuo Okumura, Sayaka Kuorkawa, Koichi Nagashima, Yuji Wakamatsu, Satoshi Hayashida, Kimie Ohkubo, Toshiko Nakai, Hiroyuki Hao, Rie Takahashi, Yoshiki Taniguchi
In vivo tissue temperature during lesion size index-guided 50W ablation versus 30W ablation: A porcine study. Journal of cardiovascular electrophysiology (2022)
Naoto Otsuka, Yasuo Okumura, Sayaka Kuorkawa, Koichi Nagashima, Yuji Wakamatsu, Satoshi Hayashida, Kimie Ohkubo, Toshiko Nakai, Hiroyuki Hao, Rie Takahashi, Yoshiki Taniguchi
In vivo tissue temperatures during 90 W/4 sec-very high power-short-duration (vHPSD) ablation versus ablation index-guided 50 W-HPSD ablation: A porcine study. Journal of cardiovascular electrophysiology 34 (2) (2022)
Naoto Otsuka, Yasuo Okumura, Sayaka Kuorkawa, Koichi Nagashima, Yuji Wakamatsu, Satoshi Hayashida, Kimie Ohkubo, Toshiko Nakai, Hiroyuki Hao, Rie Takahashi, Yoshiki Taniguchi
In vivo tissue temperatures during 90 W/4 sec-very high power-short-duration (vHPSD) ablation versus ablation index-guided 50 W-HPSD ablation: A porcine study. Journal of cardiovascular electrophysiology (2022)
Yoshiaki Kaneko, Tadashi Nakajima, Shuntaro Tamura, Koichi Nagashima, Takashi Kobari, Hiroshi Hasegawa, Hideki Ishii
Discrimination of atypical atrioventricular nodal reentrant tachycardia from atrial tachycardia by the V-A-A-V response. Pacing and clinical electrophysiology : PACE 45 (7) (2022)
Naoto Otsuka, Yasuo Okumura, Sayaka Kuorkawa, Koichi Nagashima, Yuji Wakamatsu, Satoshi Hayashida, Kimie Ohkubo, Toshiko Nakai, Hiroyuki Hao, Rie Takahashi, Yoshiki Taniguchi
Actual tissue temperature during ablation index-guided high-power short-duration ablation versus standard ablation: Implications in terms of the efficacy and safety of atrial fibrillation ablation. Journal of cardiovascular electrophysiology (2021)
Moyuru Hirata, Yuji Wakamatsu, Koichi Nagashima, Sayaka Kurokawa, Naoto Otsuka, Seina Yagyu, Shu Hirata, Toshiko Nakai, Yasuo Okumura
One electrogram-tracing tells all: What is the mechanism of this supraventricular tachycardia? Journal of cardiovascular electrophysiology 32 (4) (2021)
Seina Yagyu, Koichi Nagashima, Yuji Wakamatsu, Naoto Otsuka, Satoshi Hayashida, Sayaka Kurokawa, Shu Hirata, Yasuo Okumura
Three-dimensional visualization of bidirectional preferential pathway conduction of premature ventricular contractions originating from the outflow tract. Journal of cardiovascular electrophysiology 32 (6) (2021)
Shiro Nakahara, Yuji Wakamatsu, Reiko Fukuda, Yuichi Hori, Naoki Nishiyama, Hirotsugu Sato, Koichi Nagashima, Yukiko Mizutani, Tetsuya Ishikawa, Sayuki Kobayashi, Isao Taguchi, Yasuo Okumura
Utility of hot-balloon-based pulmonary vein isolation under balloon surface temperature monitoring: First clinical experience. Journal of cardiovascular electrophysiology 32 (10) (2021)
Shiro Nakahara, Yuji Wakamatsu, Hirotsugu Sato, Naoto Otsuka, Reiko Fukuda, Ryuta Watanabe, Sayaka Kurokawa, Tetsuya Ishikawa, Motoki Takaoka, Koichi Nagashima, Sayuki Kobayashi, Isao Taguchi, Yasuo Okumura
A porcine study of the area of heated tissue during hot-balloon ablation: Implications for the clinical efficacy and safety. Journal of cardiovascular electrophysiology 32 (2) (2021)
Yuji Wakamatsu, Koichi Nagashima, Sayaka Kurokawa, Naoto Otsuka, Satoshi Hayashida, Seina Yagyu, Shu Hirata, Kimie Ohkubo, Toshiko Nakai, Yasuo Okumura
Impact of the combined use of intracardiac ultrasound and a steerable sheath visualized by a 3D mapping system on pulmonary vein isolation. Pacing and clinical electrophysiology : PACE 44 (4) (2021)
Naoto Otsuka, Yuji Wakamatsu, Koichi Nagashima, Shu Hirata, Moyuru Hirata, Seina Yagyu, Sayaka Kurokawa, Toshiko Nakai, Yasuo Okumura
Old yet new form of permanent junctional reciprocating tachycardia: What is the mechanism? Journal of cardiovascular electrophysiology 32 (8) (2021)
Satoshi Hayashida, Koichi Nagashima, Sayaka Kurokawa, Masaru Arai, Ryuta Watanabe, Yuji Wakamatsu, Naoto Otsuka, Seina Yagyu, Kazuki Iso, Yasuo Okumura
Formation of low-voltage zones on the anterior left atrial wall due to mechanical compression by the ascending aorta. Journal of cardiovascular electrophysiology 32 (8) (2021)
Naoto Otsuka, Yasuo Okumura, Masaru Arai, Sayaka Kurokawa, Koichi Nagashima, Ryuta Watanabe, Yuji Wakamatsu, Seina Yagyu, Kimie Ohkubo, Toshiko Nakai, Hiroyuki Hao, Rie Takahashi, Yoshiki Taniguchi, Yxin Li
Effect of obesity and epicardial fat/fatty infiltration on electrical and structural remodeling associated with atrial fibrillation in a novel canine model of obesity and atrial fibrillation: A comparative study. Journal of cardiovascular electrophysiology 32 (4) (2021)
Yuji Wakamatsu, Koichi Nagashima, Kazuki Iso, Kazumasa Sonoda, Ryuta Watanabe, Masaru Arai, Naoto Otsuka, Satoshi Hayashida, Seina Yagyu, Syu Hirata, Sayaka Kurokawa, Ohkubo Kimie, Toshiko Nakai, Yasuo Okumura
Resetting of atrial tachycardia by a scanned extrastimulus at a downstream site on a multielectrode catheter: a simple diagnostic maneuver for locating the macroreentrant atrial tachycardia circuit. Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing (2021)
Sayaka Kurokawa, Koichi Nagashima, Ryuta Watanabe, Masaru Arai, Yuji Wakamatsu, Naoto Otsuka, Seina Yagyu, Toshiko Nakai, Yasuo Okumura
Optimal diameter of the pulmonary vein ostium for second-generation 28-mm cryoballoon ablation of atrial fibrillation. Pacing and clinical electrophysiology : PACE 43 (2) (2020)
Yuji Wakamatsu, Shiro Nakahara, Koichi Nagashima, Reiko Fukuda, Naoki Nishiyama, Ryuta Watanabe, Masaru Arai, Naoto Otsuka, Sayaka Kurokawa, Hirotsugu Sato, Tetsuya Ishikawa, Yuichi Hori, Yasuo Okumura, Isao Taguchi
Hot balloon versus cryoballoon ablation for persistent atrial fibrillation: Lesion area, efficacy, and safety. Journal of cardiovascular electrophysiology 31 (9) (2020)
Koichi Nagashima, Yuji Wakamatsu, Naoto Otsuka, Yasuo Okumura
His bundle activation during ventricular pacing in long RP tachycardia: What is the mechanism? Journal of cardiovascular electrophysiology 31 (6) (2020)
Naoto Otsuka, Koichi Nagashima, Yuji Wakamatsu, Yasuo Okumura
Supraventricular tachycardia with QRS alternans: What is the mechanism? Journal of cardiovascular electrophysiology 31 (6) (2020)
Yuji Wakamatsu, Koichi Nagashima, Ichiro Watanabe, Ryuta Watanabe, Masaru Arai, Naoto Otsuka, Seina Yagyu, Sayaka Kurokawa, Kimie Ohkubo, Toshiko Nakai, Yasuo Okumura
The modified ablation index: a novel determinant of acute pulmonary vein reconnections after pulmonary vein isolation. Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing 55 (3) (2019)
Yuji Wakamatsu, Koichi Nagashima, Ryuta Watanabe, Masaru Arai, Naoto Otsuka, Seina Yagyu, Sayaka Kurokawa, Kimie Ohkubo, Toshiko Nakai, Yasuo Okumura
Novel V-V-A response after right ventricular entrainment pacing for narrow QRS tachycardia: What is the mechanism? Journal of cardiovascular electrophysiology 30 (11) (2019)
Yuji Wakamatsu, Koichi Nagashima, Shiro Nakahara, Kazuki Iso, Ryuta Watanabe, Masaru Arai, Naoto Otsuka, Seina Yagyu, Sayaka Kurokawa, Kimie Ohkubo, Toshiko Nakai, Yasuo Okumura
Electrophysiologic and anatomic factors predictive of a need for touch-up radiofrequency application for complete pulmonary vein isolation: Comparison between hot balloon- and cryoballoon-based ablation. Journal of cardiovascular electrophysiology 30 (8) (2019)
Koichi Nagashima, Ichiro Watanabe, Yasuo Okumura, Kazuki Iso, Keiko Takahashi, Ryuta Watanabe, Masaru Arai, Sayaka Kurokawa, Toshiko Nakai, Kimie Ohkubo, Shunichi Yoda, Atsushi Hirayama
High-voltage zones within the pulmonary vein antra: Major determinants of acute pulmonary vein reconnections after atrial fibrillation ablation. Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing 49 (2) (2017)