著者
Yoshinao Yazaki Kazuhiro Satomi Taishiro Chikamori
出版者
The Japanese Society of Internal Medicine
雑誌
Internal Medicine (ISSN:09182918)
巻号頁・発行日
vol.61, no.11, pp.1645-1651, 2022-06-01 (Released:2022-06-01)
参考文献数
8
被引用文献数
1

Objective The Lewis lead configuration is an alternative bipolar chest lead and it can help detect atrial activity. The utility of the Lewis lead to distinguish orthodromic atrioventricular reentrant tachycardia (AVRT) from typical atrioventricular nodal reentrant tachycardia (AVNRT) by visualizing the apparent retrogradely conducted P waves was investigated. Methods Forty-four patients with paroxysmal supraventricular tachycardia (PSVT) were included in this study. All patients had PSVT documented by an electrocardiogram (ECG) and underwent an electrophysiological study (EPS). During tachycardia, an ECG recording was performed using a Lewis lead with the electrode on the right aspect of the sternum at the second intercostal space instead of the right arm and the electrode on the fourth intercostal space instead of the left arm. The ECG parameters during tachycardia were compared between AVRT and AVNRT. Results Fourteen patients were diagnosed with AVRTs and 30 with typical AVNRTs on EPS. The positive P wave could be seen in the Lewis lead configuration in 9 of 14 patients with AVRTs and 21 of 30 patients with AVNRTs. P waves were more often visible in the Lewis lead configuration than in the standard leads (66% vs. 45%). The RP interval was significantly longer for AVRTs than for AVNRTs (88±17 vs. 154±34 ms, p<0.001), which yields 89% sensitivity and 71% specificity for distinguishing these 2 tachyarrhythmias with a cut-off point of 100 ms. Conclusion A Lewis lead configuration may help to make an accurate diagnosis among the reentrant supraventricular tachycardias prior to procedures, owing to its ability to locate P waves.
著者
Toyonobu Tsuda Takeshi Kato Keisuke Usuda Takashi Kusayama Soichiro Usui Kenji Sakata Kenshi Hayashi Masa-aki Kawashiri Masakazu Yamagishi Masayuki Takamura Takayuki Otsuka Shinya Suzuki Akio Hirata Masato Murakami Mitsuru Takami Masaomi Kimura Hidehira Fukaya Shiro Nakahara Wataru Shimizu Yu-ki Iwasaki Hiroshi Hayashi Tomoo Harada Ikutaro Nakajima Ken Okumura Junjiroh Koyama Michifumi Tokuda Teiichi Yamane Yukihiko Momiyama Kojiro Tanimoto Kyoko Soejima Noriko Nonoguchi Koichiro Ejima Nobuhisa Hagiwara Masahide Harada Kazumasa Sonoda Masaru Inoue Koji Kumagai Hidemori Hayashi Kazuhiro Satomi Yoshinao Yazaki Yuji Watari Masaru Arai Ryuta Watanabe Katsuaki Yokoyama Naoya Matsumoto Koichi Nagashima Yasuo Okumura on behalf of the AF Ablation Frontier Registry and the Hokuriku-Plus AF Registry Investigators
出版者
The Japanese Circulation Society
雑誌
Circulation Journal (ISSN:13469843)
巻号頁・発行日
vol.87, no.7, pp.939-946, 2023-06-23 (Released:2023-06-23)
参考文献数
36
被引用文献数
5

Background: A recent randomized trial demonstrated that catheter ablation for atrial fibrillation (AF) in patients with heart failure with reduced ejection fraction (EF) is associated with a reduction in death or heart failure. However, the effect of catheter ablation for AF in patients with heart failure with mid-range or preserved EF is unclear.Methods and Results: We screened 899 AF patients (72.4% male, mean age 68.4 years) with heart failure and left ventricular EF ≥40% from 2 Japanese multicenter AF registries: the Atrial Fibrillation registry to Follow the long-teRm Outcomes and use of aNTIcoagulants aftER Ablation (AF Frontier Ablation Registry) as the ablation group (525 patients who underwent ablation) and the Hokuriku-Plus AF Registry as the medical therapy group (374 patients who did not undergo ablation). Propensity score matching was performed in these 2 registries to yield 106 matched patient pairs. The primary endpoint was a composite of cardiovascular death and hospitalization for heart failure. At 24.6 months, the ablation group had a significantly lower incidence of the primary endpoint (hazard ratio 0.32; 95% confidence interval 0.13–0.70; P=0.004) than the medical therapy group.Conclusions: Compared with medical therapy, catheter ablation for AF in patients with heart failure and mid-range or preserved EF was associated with a significantly lower incidence of cardiovascular death or hospitalization for heart failure.
著者
Toyonobu Tsuda Takeshi Kato Keisuke Usuda Takashi Kusayama Soichiro Usui Kenji Sakata Kenshi Hayashi Masa-aki Kawashiri Masakazu Yamagishi Masayuki Takamura Takayuki Otsuka Shinya Suzuki Akio Hirata Masato Murakami Mitsuru Takami Masaomi Kimura Hidehira Fukaya Shiro Nakahara Wataru Shimizu Yu-ki Iwasaki Hiroshi Hayashi Tomoo Harada Ikutaro Nakajima Ken Okumura Junjiroh Koyama Michifumi Tokuda Teiichi Yamane Yukihiko Momiyama Kojiro Tanimoto Kyoko Soejima Noriko Nonoguchi Koichiro Ejima Nobuhisa Hagiwara Masahide Harada Kazumasa Sonoda Masaru Inoue Koji Kumagai Hidemori Hayashi Kazuhiro Satomi Yoshinao Yazaki Yuji Watari Masaru Arai Ryuta Watanabe Katsuaki Yokoyama Naoya Matsumoto Koichi Nagashima Yasuo Okumura on behalf of the AF Ablation Frontier Registry and the Hokuriku-Plus AF Registry Investigators
出版者
The Japanese Circulation Society
雑誌
Circulation Journal (ISSN:13469843)
巻号頁・発行日
pp.CJ-22-0461, (Released:2022-12-02)
参考文献数
36
被引用文献数
5

Background: A recent randomized trial demonstrated that catheter ablation for atrial fibrillation (AF) in patients with heart failure with reduced ejection fraction (EF) is associated with a reduction in death or heart failure. However, the effect of catheter ablation for AF in patients with heart failure with mid-range or preserved EF is unclear.Methods and Results: We screened 899 AF patients (72.4% male, mean age 68.4 years) with heart failure and left ventricular EF ≥40% from 2 Japanese multicenter AF registries: the Atrial Fibrillation registry to Follow the long-teRm Outcomes and use of aNTIcoagulants aftER Ablation (AF Frontier Ablation Registry) as the ablation group (525 patients who underwent ablation) and the Hokuriku-Plus AF Registry as the medical therapy group (374 patients who did not undergo ablation). Propensity score matching was performed in these 2 registries to yield 106 matched patient pairs. The primary endpoint was a composite of cardiovascular death and hospitalization for heart failure. At 24.6 months, the ablation group had a significantly lower incidence of the primary endpoint (hazard ratio 0.32; 95% confidence interval 0.13–0.70; P=0.004) than the medical therapy group.Conclusions: Compared with medical therapy, catheter ablation for AF in patients with heart failure and mid-range or preserved EF was associated with a significantly lower incidence of cardiovascular death or hospitalization for heart failure.
著者
Yasuo Okumura Koichi Nagashima Masaru Arai Ryuta Watanabe Katsuaki Yokoyama Naoya Matsumoto Takayuki Otsuka Shinya Suzuki Akio Hirata Masato Murakami Mitsuru Takami Masaomi Kimura Hidehira Fukaya Shiro Nakahara Takeshi Kato Wataru Shimizu Yu-ki Iwasaki Hiroshi Hayashi Tomoo Harada Ikutaro Nakajima Ken Okumura Junjiroh Koyama Michifumi Tokuda Teiichi Yamane Yukihiko Momiyama Kojiro Tanimoto Kyoko Soejima Noriko Nonoguchi Koichiro Ejima Nobuhisa Hagiwara Masahide Harada Kazumasa Sonoda Masaru Inoue Koji Kumagai Hidemori Hayashi Kazuhiro Satomi Yoshinao Yazaki Yuji Watari on behalf of the AF Ablation Frontier Registry
出版者
The Japanese Circulation Society
雑誌
Circulation Journal (ISSN:13469843)
巻号頁・発行日
pp.CJ-19-0602, (Released:2019-10-16)
参考文献数
27
被引用文献数
17

Background:The safety of discontinuing oral anticoagulant (OAC) after ablation for atrial fibrillation (AF) in Japanese patients has not been clarified.Methods and Results:A study based on the Atrial Fibrillation registry to Follow the long-teRm Outcomes and use of aNTIcoagulants aftER Ablation (AF Frontier Ablation Registry) was conducted. Data were collected from 3,451 consecutive patients (74.1% men; age, 63.3±10.3 years) who had undergone AF ablation at any of 24 cardiovascular centers in Japan between August 2011 and July 2017. During a 20.7-month follow-up period, OAC therapy was discontinued in 1,836 (53.2%) patients; 51 patients (1.5%) suffered a stroke/transient ischemic attack (TIA), 71 (2.1%) suffered major bleeding, and 36 (1.0%) died. Patients in whom OAC therapy was discontinued were significantly younger than those in whom OACs were continued, and their CHA2DS2-VASc scores were significantly lower. The incidences of stroke/TIA, major bleeding, and death were significantly lower among these patients. Upon multivariate adjustment, stroke events were independently associated with relatively high baseline CHA2DS2-VASc scores but not with OAC status.Conclusions:Although the incidences of stroke/TIA, major bleeding, and death were relatively low among patients for whom OAC therapy was discontinued, stroke/TIA occurrence was strongly associated with a high baseline stroke risk rather than with OAC status. Thus, discontinuation of OAC therapy requires careful consideration, especially in patients with a high baseline stroke risk.
著者
Takeshi Yagyu Satoshi Yasuda Noritoshi Nagaya Kaori Doi Takeshi Nakatani Kazuhiro Satomi Wataru Shimizu Kengo Kusano Toshihisa Anzai Teruo Noguchi Hajime Ohgushi Soichiro Kitamura Kenji Kangawa Hisao Ogawa
出版者
The Japanese Circulation Society
雑誌
Circulation Journal (ISSN:13469843)
巻号頁・発行日
pp.CJ-18-1179, (Released:2019-05-17)
参考文献数
45
被引用文献数
11

Background:Mesenchymal stem cells (MSCs), which have the potential to differentiate into cardiomyocytes or vascular endothelial cells, have been used clinically as therapy for cardiomyopathy. In this study, we aimed to evaluate the long-term follow-up results.Methods and Results:We studied 8 patients with symptomatic heart failure (HF) on guideline-directed therapy (ischemic cardiomyopathy, n=3; nonischemic cardiomyopathy, n=5) who underwent intracardiac MSC transplantation using a catheter-based injection method between May 2004 and April 2006. Major adverse events and hospitalizations were investigated up to 10 years afterward. Compared with baseline, there were no significant differences in B-type natriuretic peptide (BNP) (from 211 to 173 pg/mL), left ventricular ejection fraction (LVEF) (from 24% to 26%), and peak oxygen uptake (from 16.5 to 19.2 mL/min/kg) at 2 months. During the follow-up period, no patients experienced serious adverse events such as arrhythmias. Three patients died of pneumonia in the 1st year, liver cancer in the 6th year, and HF in the 7th year. Of the remaining 5 patients, 3 patients were hospitalized for exacerbated HF, 1 of whom required heart transplantation in the 2nd year; 2 patients survived for 10 years without worsening HF.Conclusions:The results of this exploratory study of intracardiac MSCs administration suggest further research regarding the feasibility and efficacy is warranted.
著者
Yasuo Okumura Koichi Nagashima Masaru Arai Ryuta Watanabe Katsuaki Yokoyama Naoya Matsumoto Takayuki Otsuka Shinya Suzuki Akio Hirata Masato Murakami Mitsuru Takami Masaomi Kimura Hidehira Fukaya Shiro Nakahara Takeshi Kato Wataru Shimizu Yu-ki Iwasaki Hiroshi Hayashi Tomoo Harada Ikutaro Nakajima Ken Okumura Junjiroh Koyama Michifumi Tokuda Teiichi Yamane Yukihiko Momiyama Kojiro Tanimoto Kyoko Soejima Noriko Nonoguchi Koichiro Ejima Nobuhisa Hagiwara Masahide Harada Kazumasa Sonoda Masaru Inoue Koji Kumagai Hidemori Hayashi Kazuhiro Satomi Yoshinao Yazaki Yuji Watari on behalf of the AF Ablation Frontier Registry
出版者
The Japanese Circulation Society
雑誌
Circulation Journal (ISSN:13469843)
巻号頁・発行日
vol.83, no.12, pp.2418-2427, 2019-11-25 (Released:2019-11-25)
参考文献数
27
被引用文献数
17

Background:The safety of discontinuing oral anticoagulant (OAC) after ablation for atrial fibrillation (AF) in Japanese patients has not been clarified.Methods and Results:A study based on the Atrial Fibrillation registry to Follow the long-teRm Outcomes and use of aNTIcoagulants aftER Ablation (AF Frontier Ablation Registry) was conducted. Data were collected from 3,451 consecutive patients (74.1% men; age, 63.3±10.3 years) who had undergone AF ablation at any of 24 cardiovascular centers in Japan between August 2011 and July 2017. During a 20.7-month follow-up period, OAC therapy was discontinued in 1,836 (53.2%) patients; 51 patients (1.5%) suffered a stroke/transient ischemic attack (TIA), 71 (2.1%) suffered major bleeding, and 36 (1.0%) died. Patients in whom OAC therapy was discontinued were significantly younger than those in whom OACs were continued, and their CHA2DS2-VASc scores were significantly lower. The incidences of stroke/TIA, major bleeding, and death were significantly lower among these patients. Upon multivariate adjustment, stroke events were independently associated with relatively high baseline CHA2DS2-VASc scores but not with OAC status.Conclusions:Although the incidences of stroke/TIA, major bleeding, and death were relatively low among patients for whom OAC therapy was discontinued, stroke/TIA occurrence was strongly associated with a high baseline stroke risk rather than with OAC status. Thus, discontinuation of OAC therapy requires careful consideration, especially in patients with a high baseline stroke risk.