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481 results on '"Okamoto, Naotaka"'

5. Comparison of advanced generation cryoballoon ablation and ablation index-guided pulmonary vein isolation with non-pulmonary vein trigger induction test and additional ablation in paroxysmal atrial fibrillation

Author

Egami, Yasuyuki, Nishino, Masami, Nohara, Hiroaki, Kawanami, Shodai, Sugae, Hiroki, Ukita, Kohei, Kawamura, Akito, Nakamura, Hitoshi, Yasumoto, Koji, Tsuda, Masaki, Okamoto, Naotaka, Matsunaga-Lee, Yasuharu, Yano, Masamichi, and Tanouchi, Jun

Published
2023
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8. Duration of atrial fibrillation persistence: Implications for recurrence risk after catheter ablation and efficacy of additional substrate ablation

Author

Matsuda, Yasuhiro, Masuda, Masaharu, Mano, Toshiaki, Inoue, Koichi, Matsumura, Yasushi, Kawasaki, Masato, Watanabe, Tetsuya, Yamada, Takahisa, Miyoshi, Miwa, Kanda, Takashi, Minamiguchi, Hitoshi, Makino, Nobuhiko, Higuchi, Yoshiharu, Matsunaga, Yasuharu, Egami, Yasuyuki, Nishino, Masami, Tanouchi, Jun, Sato, Taiki, Kida, Hirota, Sunaga, Akihiro, Nakano, Tomoaki, Ozu, Kentaro, Sotomi, Yohei, Dohi, Tomoharu, Okada, Katsuki, Oka, Takafumi, Takeda, Toshihiro, Nakatani, Daisaku, Hikoso, Shungo, Sakata, Yasushi, Tanaka, Nobuaki, Tanaka, Koji, Minamisaka, Tomoko, Hoshida, Shiro, Matsunaga-Lee, Yasuharu, Okada, Masato, Kawanami, Shodai, Ukita, Kohei, Kawamura, Akito, Yasumoto, Koji, Tsuda, Masaki, Okamoto, Naotaka, and Yano, Masamichi

Published
2024
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18. Prognostic impact of cardiovascular polypharmacy on octogenarians with heart failure with preserved ejection fraction

Author

Nishino, Masami, Egami, Yasuyuki, Kawanami, Shodai, Sugae, Hiroki, Ukita, Kohei, Kawamura, Akito, Nakamura, Hitoshi, Yasumoto, Koji, Tsuda, Masaki, Okamoto, Naotaka, Matsunaga-Lee, Yasuharu, Yano, Masamichi, Tanouchi, Jun, Yamada, Takahisa, Yasumura, Yoshio, Seo, Masahiro, Tamaki, Shunsuke, Hayashi, Takaharu, Nakagawa, Akito, Nakagawa, Yusuke, Sotomi, Yohei, Nakatani, Daisaku, Hikoso, Shungo, and Sakata, Yasushi

Published
2023
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23. Abstract 17285: Impact of Baseline Yellow Plaque Assessed by Coronary Angioscopy on 11-month Vascular Response After Stent Implantation

Author

Tsujimura, Takuya, Ishihara, Takayuki, Mizote, Isamu, Nakamura, Daisuke, Okamoto, Naotaka, Shiraki, Tatsuya, Naoki, Itaya, Takahara, Mitsuyoshi, nakayoshi, takaharu, Iida, Osamu, Hata, Yosuke, Nishino, Masami, Ueno, Takafumi, Nakatani, Daisaku D, Hikoso, Shungo, Nanto, Shinsuke, Mano, Toshiaki, and Sakata, Yasushi

Published
2023
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25. Clinical impact of blood urea nitrogen, regardless of renal function, in heart failure with preserved ejection fraction

Author

Yano, Masamichi, Nishino, Masami, Ukita, Kohei, Kawamura, Akito, Nakamura, Hitoshi, Matsuhiro, Yutaka, Yasumoto, Koji, Tsuda, Masaki, Okamoto, Naotaka, Matsunaga-Lee, Yasuharu, Egami, Yasuyuki, Tanouchi, Jun, Yamada, Takahisa, Yasumura, Yoshio, Tamaki, Shunsuke, Hayashi, Takaharu, Nakagawa, Akito, Nakagawa, Yusuke, Sotomi, Yohei, Nakatani, Daisaku, Hikoso, Shungo, and Sakata, Yasushi

Published
2022
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29. Changes in QRS morphology during antidromic atrioventricular reentrant tachycardia.

Author

Ukita, Kohei, Egami, Yasuyuki, Nohara, Hiroaki, Kawanami, Shodai, Kawamura, Akito, Yasumoto, Koji, Tsuda, Masaki, Okamoto, Naotaka, Matsunaga‐Lee, Yasuharu, Yano, Masamichi, and Nishino, Masami

Subjects
BUNDLE-branch block, ADENOSINE triphosphate, SUPRAVENTRICULAR tachycardia, RADIO frequency therapy, TREATMENT effectiveness, ELECTROCARDIOGRAPHY, HEART beat, HIS bundle, CATHETER ablation, ELECTROPHYSIOLOGY, ATRIOVENTRICULAR node
Abstract

We report a case of a 44‐year‐old male who underwent an electrophysiological study for symptomatic supraventricular tachycardia (SVT) with wide QRS complex. The SVT was diagnosed as an antidromic atrioventricular reentrant tachycardia (AVRT) via antegrade conduction of left‐sided accessory pathway (AP). However, the QRS morphology changed during the SVT, and then the SVT was terminated spontaneously. The mapping of AP was performed during sinus rhythm, and the radiofrequency application successfully eliminated the AP, which rendered tachycardias non‐inducible. This was a rare case of antidromic AVRT during which the QRS morphology changed. [ABSTRACT FROM AUTHOR]

Published
2024
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30. ST‐segment depression and left ventricular systolic function recovery post‐atrial fibrillation ablation in heart failure.

Author

Yano, Masamichi, Egami, Yasuyuki, Kawanami, Shodai, Ukita, Kohei, Kawamura, Akito, Yasumoto, Koji, Tsuda, Masaki, Okamoto, Naotaka, Matsunaga‐Lee, Yasuharu, and Nishino, Masami

Subjects
CORONARY artery bypass, MAJOR adverse cardiovascular events, VENTRICULAR arrhythmia, VENTRICULAR fibrillation, PERCUTANEOUS coronary intervention
Abstract

Aims: Catheter ablation (CA) of atrial fibrillation (AF) improves left ventricular ejection fraction (LVEF) in patients with heart failure with reduced ejection fraction (HFrEF). The impact of ST‐segment depression before CA on LVEF recovery and clinical outcomes remains unknown. In the present study, we aimed to investigate the relationship between ST‐segment depression during AF rhythm before CA and improvement in the LVEF and clinical outcomes in persistent atrial fibrillation (PerAF) patients with HFrEF. Methods and results: The present study included 122 PerAF patients (male; 98 patients, 80%, mean age: 69 [56, 76] years) from the Osaka Rosai Atrial Fibrillation ablation (ORAF) registry who had LVEF < 50% and underwent an initial ablation. The patients who underwent percutaneous coronary intervention or coronary artery bypass grafting within the past 1 month were not included in the enrolled patients. We assigned the patients based on the presence of ST‐segment depression before CA during AF rhythm and evaluated improvement in the LVEF (LVEF ≥ 15%) 1 year after CA and the relationship between ST‐segment depression and heart failure (HF) hospitalization/major adverse cardiovascular events (MACE), which are defined as a composite of HF hospitalization, cardiovascular death, hospitalization due to coronary artery disease, ventricular arrhythmia requiring hospitalization and stroke. The percentage of patients with improvement in the LVEF 1 year after CA was significantly lower in the patients with ST‐segment depression than those without (58.6% vs. 79.7%, P = 0.012). Multiple regression analysis showed ST‐segment depression was independently and significantly associated with improvement in the LVEF 1 year after CA (HR: 0.35; 95% CI: 0.129–0.928, P = 0.035). Kaplan–Meier analysis showed that the patients with ST‐segment depression significantly had higher risk of HF hospitalization and MACE than those without (log rank P = 0.022 and log rank P = 0.002, respectively). Multivariable Cox proportional hazards analysis showed that ST‐segment depression was independently and significantly associated with a higher risk of MACE (HR: 2.82; 95% CI: 1.210–6.584, P = 0.016). Conclusions: ST‐segment depression before CA during AF rhythm was useful prognostic predictor of improvement in the LVEF and clinical outcomes including HF hospitalization and MACE in PerAF patients with HFrEF. [ABSTRACT FROM AUTHOR]

Published
2024
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36. Orbital Atherectomy for Treatment of Severely Calcified Coronary Artery Bifurcation Lesions: A Multicenter Analysis

Author

Sturm, Robert, Armstrong, Ehrin J., Benhuri, Benjamin, Okamoto, Naotaka, Vengrenyuk, Yuliya, Shlofmitz, Evan, Revtyak, George E., Martinsen, Brad J., Igyarto, Zsuzsanna, Valle, Javier A., Waldo, Stephen W., Aksut, Baran, Bell, Sean, Gardner, Ryan, Lee, Michael, Zakir, Ramzan, Shroff, Adhir, Don, Creighton, Shlofmitz, Richard, Chambers, Jeffrey W., Kini, Annapoorna, and Sharma, Samin

Published
2021
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39. Alternative Echocardiographic Algorithm for Left Ventricular Filling Pressure in Patients With Heart Failure With Preserved Ejection Fraction

Author

Matsuhiro, Yutaka, Nishino, Masami, Ukita, Kohei, Kawamura, Akito, Nakamura, Hitoshi, Yasumoto, Koji, Tsuda, Masaki, Okamoto, Naotaka, Tanaka, Akihiro, Matsunaga-Lee, Yasuharu, Yano, Masamichi, Egami, Yasuyuki, Shutta, Ryu, Tanouchi, Jun, Yamada, Takahisa, Yasumura, Yoshio, Tamaki, Shunsuke, Hayashi, Takaharu, Nakagawa, Akito, Nakagawa, Yusuke, Nakatani, Daisaku, Sotomi, Yohei, Hikoso, Shungo, and Sakata, Yasushi

Published
2021
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43. Risk factors for tachycardia‐induced cardiomyopathy due to atrial fibrillation.

Author

Yasumoto, Koji, Egami, Yasuyuki, Nohara, Hiroaki, Kawanami, Shodai, Sugae, Hiroki, Ukita, Kohei, Kawamura, Akito, Nakamura, Hitoshi, Tsuda, Masaki, Okamoto, Naotaka, Matsunaga‐Lee, Yasuharu, Yano, Masamichi, Nishino, Masami, and Tanouchi, Jun

Subjects
RISK assessment, HEART atrium, CARDIOMYOPATHIES, SMOKING, DESCRIPTIVE statistics, MULTIVARIATE analysis, HEART beat, ODDS ratio, ATRIAL fibrillation, TACHYCARDIA, CATHETER ablation, CONFIDENCE intervals, PATIENTS' attitudes, DISEASE risk factors, DISEASE complications
Abstract

Background: Tachycardia‐induced cardiomyopathy (TIC) is a reversible cardiomyopathy with ventricular dysfunction caused by tachyarrhythmias. Notably, atrial fibrillation (AF) is the most common causal arrhythmia leading to TIC. However, the risk factors for the development of TIC due to AF remain unclear. This study aimed to identify the associated factors of TIC due to AF. Methods: Persistent AF patients with heart rate (HR) ≥100 beats per minute who underwent initial catheter ablation were enrolled in this study. TIC was diagnosed as left ventricular ejection fraction (LVEF) < 50% during AF rhythm, which was recovered after the restoration of sinus rhythm. Non‐TIC was defined as LVEF ≥ 50% despite AF rhythm. The patient backgrounds were compared between the TIC group and the non‐TIC group to reveal the contributing factors of TIC. Results: The TIC group comprised 57 patients, while the non‐TIC group consisted of 101 patients. The TIC group was younger than the non‐TIC group (median 64 vs. 70, p = 0.006). Male sex was more frequent in the TIC group than the non‐TIC group (82.5% vs. 58.4%, p = 0.003). HR was higher in the TIC group than in the non‐TIC group (median 130 bpm vs. 111 bpm, p < 0.001). The number of smokers was significantly higher in the TIC group than in the non‐TIC group (p < 0.001). Multivariable analysis demonstrated that higher HR (odds ratio [OR]: 1.74; 95% confidence interval [CI]: 1.37–2.21; p < 0.001) and current smokers (OR: 5.27; 95% CI: 1.60–17.4; p = 0.006) were the independent factors leading to TIC. Conclusion: Higher HR and current smokers were independent risk factors for the development of TIC due to AF. [ABSTRACT FROM AUTHOR]

Published
2024
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48. An irregular tachycardia: What is the mechanism?

Author

Matsunaga‐Lee, Yasuharu, primary, Egami, Yasuyuki, additional, Kawanami, Shodai, additional, Ukita, Kohei, additional, Kawamura, Akito, additional, Yasumoto, Koji, additional, Tsuda, Masaki, additional, Okamoto, Naotaka, additional, Yano, Masamichi, additional, and Nishino, Masami, additional

Published
2024
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49. Duration of Atrial Fibrillation Persistence: Implications for Recurrence Risk after Catheter Ablation and Efficacy of Additional Substrate Ablation

Author

Matsunaga-Lee, Yasuharu, primary, Inoue, Koichi, additional, Tanaka, Nobuaki, additional, Masuda, Masaharu, additional, Watanabe, Tetsuya, additional, Makino, Nobuhiko, additional, Egami, Yasuyuki, additional, Oka, Takafumi, additional, Minamiguchi, Hitoshi, additional, Miyoshi, Miwa, additional, Okada, Masato, additional, Kanda, Takashi, additional, Matsuda, Yasuhiro, additional, Kawasaki, Masato, additional, Kawanami, Shodai, additional, Ukita, Kohei, additional, Kawamura, Akito, additional, Yasumoto, Koji, additional, Tsuda, Masaki, additional, Okamoto, Naotaka, additional, Yano, Masamichi, additional, Nishino, Masami, additional, Sunaga, Akihiro, additional, Sotomi, Yohei, additional, Dohi, Tomoharu, additional, Nakatani, Daisaku, additional, Hikoso, Shungo, additional, and Sakata, Yasushi, additional

Published
2024
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