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Tachibana S, Miyazaki S, Nitta J, Shirai Y, Nagata Y, Sagawa Y, Sekiguchi Y, Inamura Y, Sasaki T, Yamauchi Y, Inaba O, Ono Y, Suzuki M, Suzuki A, Iwai S, Okada H, Mizukami A, Azegami K, Hachiya H, Handa K, Goto K, Nishimura T, Hirao K, Takahashi A, Sasano T. Incidence of phrenic nerve injury during pulmonary vein isolation using different cryoballoons: data from a large prospective ablation registry. Europace 2024; 26:euae092. [PMID: 38588039 PMCID: PMC11057019 DOI: 10.1093/europace/euae092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 04/02/2024] [Indexed: 04/10/2024] Open
Abstract
AIMS Phrenic nerve injury (PNI) is the most common complication during cryoballoon ablation. Currently, two cryoballoon systems are available, yet the difference is unclear. We sought to compare the acute procedural efficacy and safety of the two cryoballoons. METHODS This prospective observational study consisted of 2,555 consecutive atrial fibrillation (AF) patients undergoing pulmonary vein isolation (PVI) using either conventional (Arctic Front Advance) (AFA-CB) or novel cryoballoons (POLARx) (POLARx-CB) at 19 centers between January 2022 and October 2023. RESULTS Among 2,555 patients (68.8 ± 10.9 years, 1,740 men, paroxysmal AF[PAF] 1,670 patients), PVIs were performed by the AFA-CB and POLARx-CB in 1,358 and 1,197 patients, respectively. Touch-up ablation was required in 299(11.7%) patients. The touch-up rate was significantly lower for POLARx-CB than AFA-CB (9.5% vs. 13.6%, p = 0.002), especially for right inferior PVs (RIPVs). The touch-up rate was significantly lower for PAF than non-PAF (8.8% vs. 17.2%, P < 0.001) and was similar between the two cryoballoons in non-PAF patients. Right PNI occurred in 64(2.5%) patients and 22(0.9%) were symptomatic. It occurred during the right superior PV (RSPV) ablation in 39(1.5%) patients. The incidence was significantly higher for POLARx-CB than AFA-CB (3.8% vs. 1.3%, P < 0.001) as was the incidence of symptomatic PNI (1.7% vs. 0.1%, P < 0.001). The difference was significant during RSPV (2.5% vs. 0.7%, P < 0.001) but not RIPV ablation. The PNI recovered more quickly for the AFA-CB than POLARx-CB. CONCLUSIONS Our study demonstrated a significantly higher incidence of right PNI and lower touch-up rate for the POLARx-CB than AFA-CB in the real-world clinical practice.
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Affiliation(s)
- Shinichi Tachibana
- Department of Cardiology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| | - Shinsuke Miyazaki
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Junichi Nitta
- Department of Cardiology, Sakakibara Heart Institute, Tokyo, Japan
| | - Yasuhiro Shirai
- Department of Cardiology, Disaster Medical Center, Tokyo, Japan
| | - Yasutoshi Nagata
- Department of Cardiology, Japanese Red Cross Musashino Hospital, Tokyo, Japan
| | - Yuichiro Sagawa
- Department of Cardiology, Japanese Red Cross Yokohama City Bay Hospital, Kanagawa, Japan
| | - Yukio Sekiguchi
- Department of Cardiology, Sakakibara Heart Institute, Tokyo, Japan
| | - Yukihiro Inamura
- Department of Cardiology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| | - Takeshi Sasaki
- Department of Cardiology, Disaster Medical Center, Tokyo, Japan
| | - Yasuteru Yamauchi
- Department of Cardiology, Japanese Red Cross Yokohama City Bay Hospital, Kanagawa, Japan
| | - Osamu Inaba
- Department of Cardiology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| | - Yuichi Ono
- Department of Cardiology, Ome Municipal General Hospital, Tokyo, Japan
| | - Makoto Suzuki
- Department of Cardiology, Yokohama Minami Kyosai Hospital, Kanagawa, Japan
| | | | - Shinsuke Iwai
- Department of Cardiology, Hiratsuka Kyosai Hospital, Kanagawa, Japan
| | - Hiroyuki Okada
- Department of Cardiology, Soka Municipal Hospital, Saitama, Japan
| | - Akira Mizukami
- Department of Cardiology, Kameda Medical Center, Chiba, Japan
| | - Koji Azegami
- Department of Cardiology, Shin-Yurigaoka General Hospital, Kanagawa, Japan
| | - Hitoshi Hachiya
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Ibaraki, Japan
| | - Keita Handa
- Division of Cardiology, Kashiwa City Hospital, Chiba, Japan
| | - Kentaro Goto
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Takuro Nishimura
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Kenzo Hirao
- Arrhythmia Advanced Therapy Center, AOI Universal Hospital, Kanagawa, Japan
| | | | - Tetsuo Sasano
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
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Akiyoshi K, Higuchi K, Iwai S, Ohnishi Y. Extraction of a leadless pacemaker 28 months after implantation owing to right ventricular outflow tract obstruction. HeartRhythm Case Rep 2024; 10:124-127. [PMID: 38404981 PMCID: PMC10885820 DOI: 10.1016/j.hrcr.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024] Open
Affiliation(s)
- Kikou Akiyoshi
- Department of Cardiology, Hiratsuka Kyosai Hospital, Hiratsuka, Japan
| | - Koji Higuchi
- Department of Cardiology, Hiratsuka Kyosai Hospital, Hiratsuka, Japan
- Department of Cardiology, Cleveland Clinic, Cleveland, Ohio
| | - Shinsuke Iwai
- Department of Cardiology, Hiratsuka Kyosai Hospital, Hiratsuka, Japan
| | - Yuko Ohnishi
- Department of Cardiology, Hiratsuka Kyosai Hospital, Hiratsuka, Japan
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Shigeta T, Miyazaki S, Inaba O, Inamura Y, Nitta J, Sekiguchi Y, Takahashi A, Hachiya H, Nagata Y, Yamauchi Y, Hayashi T, Iwai S, Mizukami A, Ono Y, Handa K, Suzuki M, Suzuki A, Nakajima J, Hirao K, Okada H, Negishi M, Ikenouchi T, Yamamoto T, Goto K, Nishimura T, Tao S, Takigawa M, Hirakawa A, Goya M, Sasano T. Adjunctive posterior wall isolation for the treatment of persistent and longstanding persistent atrial fibrillation (CORNERSTONE AF) trial: Design and rationale. Clin Cardiol 2024; 47:e24164. [PMID: 37822107 PMCID: PMC10766127 DOI: 10.1002/clc.24164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 09/16/2023] [Accepted: 09/18/2023] [Indexed: 10/13/2023] Open
Abstract
BACKGROUND A left atrial posterior wall isolation (LAPWI) is one of the atrial fibrillation (AF) ablation strategies. HYPOTHESIS We hypothesized that an additional empirical LAPWI would increase the freedom from recurrent atrial arrhythmias as compared to standard AF ablation in persistent AF patients. METHODS The CORNERSTONE AF study is a prospective, randomized, multicenter study investigating patients with AF persisting for >7 days and <3 years undergoing first-time AF ablation. They will be randomized to pulmonary vein isolation (PVI) or PVI + LAPWI in a 1:1 manner. Although PVI can be performed with either radiofrequency catheters or cryoballoons, only radiofrequency catheters will be permitted to achieve LAPWIs. Additional focal ablation targeting non-pulmonary vein triggers will be allowed. A total of 516 patients will be enrolled in 17 centers between August 2022 and February 2024 based on the calculation with 80% power, considering the assumption that 65% and 75% of the PVI and PVI + LAPWI group patients will be free from atrial arrhythmia recurrence 18-months postprocedure (10% of dropout). The primary endpoint is freedom from documented atrial arrhythmias 18 months postsingle procedures. Clinical follow-up will include 7-day ambulatory electrocardiograms and routine outpatient consultations by electrophysiologists at 1, 3, 6, 9, 12, and 18 months postprocedure. RESULTS As of August 2023, a total of 331 patients (68 ± 9 years, 270 men, 43 longstanding persistent AF) have been enrolled. CONCLUSIONS The CORNERSTONE AF study is a prospective, randomized, multicenter trial designed to evaluate the efficacy and safety of an adjunctive empirical LAPWI following standard AF ablation in persistent AF patients.
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Affiliation(s)
- Takatoshi Shigeta
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Shinsuke Miyazaki
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Osamu Inaba
- Department of CardiologyJapanese Red Cross Saitama HospitalSaitamaJapan
| | - Yukihiro Inamura
- Department of CardiologyJapanese Red Cross Saitama HospitalSaitamaJapan
| | - Junichi Nitta
- Department of CardiologySakakibara Heart InstituteTokyoJapan
| | - Yukio Sekiguchi
- Department of CardiologySakakibara Heart InstituteTokyoJapan
| | | | | | - Yasutoshi Nagata
- Department of CardiologyJapanese Red Cross Musashino HospitalTokyoJapan
| | - Yasuteru Yamauchi
- Department of CardiologyJapanese Red Cross Yokohama City Bay HospitalKanagawaJapan
| | - Tatsuya Hayashi
- Division of Cardiovascular Medicine, Saitama Medical CenterJichi Medical UniversitySaitamaJapan
| | - Shinsuke Iwai
- Department of CardiologyHiratsuka Kyosai HospitalKanagawaJapan
| | | | - Yuichi Ono
- Department of CardiologyOme Municipal General HospitalTokyoJapan
| | - Keita Handa
- Division of CardiologyKashiwa City HospitalChibaJapan
| | - Makoto Suzuki
- Department of CardiologyYokohama Minami Kyosai HospitalYokohamaJapan
| | | | - Jun Nakajima
- Department of CardiologyTokyo Metropolitan Toshima HospitalTokyoJapan
| | - Kenzo Hirao
- Arrhythmia Advanced Therapy CenterAOI Universal HospitalKanagawaJapan
| | - Hiroyuki Okada
- Department of CardiologySoka Municipal HospitalSaitamaJapan
| | - Miho Negishi
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Takashi Ikenouchi
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Tasuku Yamamoto
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Kentaro Goto
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Takuro Nishimura
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Susumu Tao
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Masateru Takigawa
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Akihiro Hirakawa
- Department of Clinical Biostatistics, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityTokyoJapan
| | - Masahiko Goya
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Tetsuo Sasano
- Department of Cardiovascular MedicineTokyo Medical and Dental UniversityTokyoJapan
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Miyazaki S, Kobori A, Jo H, Keida T, Yoshitani K, Mukai M, Sagawa Y, Asakawa T, Sato E, Yamao K, Horie T, Manita M, Fukaya H, Hayashi H, Tanimoto K, Iwayama T, Chiba S, Sato A, Sekiguchi Y, Sugiura K, Iwai S, Isonaga Y, Miwa N, Kato N, Inaba O, Hirota T, Nagata Y, Ono Y, Hachiya H, Yamauchi Y, Goya M, Nitta J, Tada H, Sasano T. Symptomatic periesophageal vagal nerve injury by different energy sources during atrial fibrillation ablation. Front Cardiovasc Med 2023; 10:1278603. [PMID: 37965084 PMCID: PMC10642562 DOI: 10.3389/fcvm.2023.1278603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 10/18/2023] [Indexed: 11/16/2023] Open
Abstract
Background Symptomatic gastric hypomotility (SGH) is a rare but major complication of atrial fibrillation (AF) ablation, but data on this are scarce. Objective We compared the clinical course of SGH occurring with different energy sources. Methods This multicenter study retrospectively collected the characteristics and clinical outcomes of patients with SGH after AF ablation. Results The data of 93 patients (67.0 ± 11.2 years, 68 men, 52 paroxysmal AF) with SGH after AF ablation were collected from 23 cardiovascular centers. Left atrial (LA) ablation sets included pulmonary vein isolation (PVI) alone, a PVI plus a roof-line, and an LA posterior wall isolation in 42 (45.2%), 11 (11.8%), and 40 (43.0%) patients, respectively. LA ablation was performed by radiofrequency ablation, cryoballoon ablation, or both in 38 (40.8%), 38 (40.8%), and 17 (18.3%) patients, respectively. SGH diagnoses were confirmed at 2 (1-4) days post-procedure, and 28 (30.1%) patients required re-hospitalizations. Fasting was required in 81 (92.0%) patients for 4 (2.5-5) days; the total hospitalization duration was 11 [7-19.8] days. After conservative treatment, symptoms disappeared in 22.3% of patients at 1 month, 48.9% at 2 months, 57.6% at 3 months, 84.6% at 6 months, and 89.7% at 12 months, however, one patient required surgery after radiofrequency ablation. Symptoms persisted for >1-year post-procedure in 7 patients. The outcomes were similar regardless of the energy source and LA lesion set. Conclusions The clinical course of SGH was similar regardless of the energy source. The diagnosis was often delayed, and most recovered within 6 months, yet could persist for over 1 year in 10%.
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Affiliation(s)
- Shinsuke Miyazaki
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Atsushi Kobori
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Hyogo, Japan
| | - Hikari Jo
- Department of Cardiology, National Hospital Organization Higashi-Hiroshima Medical Center, Hiroshima, Japan
| | - Takehiko Keida
- Department of Cardiology, Edogawa Hospital, Tokyo, Japan
| | - Kazuyasu Yoshitani
- Department of Cardiology, Hyogo Prefectural Amagasaki General Medical Center, Hyogo, Japan
| | - Moe Mukai
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Yuichiro Sagawa
- Department of Cardiology, Japanese Red Cross Yokohama City Bay Hospital, Kanagawa, Japan
| | - Tetsuya Asakawa
- Department of Cardiology, Yamanashi Kosei Hospital, Yamanashi, Japan
| | - Eiji Sato
- Department of Cardiovascular Medicine, Sendai City Hospital, Miyagi, Japan
| | - Kazuya Yamao
- Department of Cardiology, Ome Municipal General Hospital, Tokyo, Japan
| | - Tomoki Horie
- Department of Cardiology, Japanese Red Cross Musashino Hospital, Tokyo, Japan
| | - Mamoru Manita
- Department of Cardiology, Naha City Hospital, Okinawa, Japan
| | - Hidehira Fukaya
- Department of Cardiovascular Medicine, Kitasato University School of Medicine, Kanagawa, Japan
| | - Hidemori Hayashi
- Department of Cardiovascular Biology and Medicine, Juntendo University, Tokyo, Japan
| | - Kojiro Tanimoto
- Department of Cardiology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Tadateru Iwayama
- Department of Cardiology, Okitama Public General Hospital, Yamagata, Japan
| | - Suguru Chiba
- Department of Cardiology, Urasoe General Hospital, Okinawa, Japan
| | - Akinori Sato
- Cardiovascular Center, Tachikawa General Hospital, Niigata, Japan
| | - Yukio Sekiguchi
- Department of Cardiology, Sakakibara Heart Institute, Tokyo, Japan
| | - Kenta Sugiura
- Department of Cardiology and Geriatrics, Kochi University, Kochi, Japan
| | - Shinsuke Iwai
- Department of Cardiology, Hiratsuka Kyosai Hospital, Kanagawa, Japan
| | - Yuhei Isonaga
- Department of Cardiology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| | - Naoyuki Miwa
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Ibaraki, Japan
| | - Nobutaka Kato
- Department of Cardiology, Hiratsuka Kyosai Hospital, Kanagawa, Japan
| | - Osamu Inaba
- Department of Cardiology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| | - Takayoshi Hirota
- Department of Cardiology and Geriatrics, Kochi University, Kochi, Japan
| | - Yasutoshi Nagata
- Department of Cardiology, Japanese Red Cross Musashino Hospital, Tokyo, Japan
| | - Yuichi Ono
- Department of Cardiology, Ome Municipal General Hospital, Tokyo, Japan
| | - Hitoshi Hachiya
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Ibaraki, Japan
| | - Yasuteru Yamauchi
- Department of Cardiology, Japanese Red Cross Yokohama City Bay Hospital, Kanagawa, Japan
| | - Masahiko Goya
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Junichi Nitta
- Department of Cardiology, Sakakibara Heart Institute, Tokyo, Japan
| | - Hiroshi Tada
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Tetsuo Sasano
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan
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Miyazaki S, Kobori A, Jo H, Keida T, Yoshitani K, Mukai M, Sagawa Y, Asakawa T, Sato E, Yamao K, Horie T, Manita M, Fukaya H, Hayashi H, Tanimoto K, Iwayama T, Chiba S, Sato A, Sekiguchi Y, Sugiura K, Iwai S, Isonaga Y, Miwa N, Kato N, Inaba O, Hirota T, Nagata Y, Ono Y, Hachiya H, Yamauchi Y, Goya M, Nitta J, Tada H, Sasano T. Symptomatic Gastroparesis After Cryoballoon-Based Atrial Fibrillation Ablation: Results From a Large Multicenter Registry. Circ Arrhythm Electrophysiol 2023; 16:e011605. [PMID: 36745559 DOI: 10.1161/circep.122.011605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Shinsuke Miyazaki
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Japan (S.M., M.G., T.S.)
| | - Atsushi Kobori
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Hyogo (A.K.)
| | - Hikari Jo
- Department of Cardiology, National Hospital Organization Higashihiroshima Medical Center, Hiroshima, Japan (H.J.)
| | - Takehiko Keida
- Department of Cardiology, Edogawa Hospital, Tokyo, Japan (T.K.)
| | - Kazuyasu Yoshitani
- Department of Cardiology, Hyogo Prefectural Amagasaki General Medical Center, Japan (K.Y.)
| | - Moe Mukai
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Japan (M. Mukai, H.T.)
| | - Yuichiro Sagawa
- Department of Cardiology, Japanese Red Cross Yokohama City Bay Hospital, Kanagawa (Y.S., Y.Y.)
| | - Tetsuya Asakawa
- Department of Cardiology, Yamanashi Kosei Hospital, Japan (T.A.)
| | - Eiji Sato
- Department of Cardiovascular Medicine, Sendai City Hospital, Miyagi, Japan (E.S.)
| | - Kazuya Yamao
- Department of Cardiology, Ome Municipal General Hospital, Tokyo, Japan (K.Y., Y.O.)
| | | | - Mamoru Manita
- Department of Cardiology, Naha City Hospital, Okinawa (M. Manita)
| | - Hidehira Fukaya
- Department of Cardiovascular Medicine, Kitasato University School of Medicine, Kanagawa (H.F.)
| | - Hidemori Hayashi
- Department of Cardiovascular Biology and Medicine, Juntendo University, Tokyo, Japan (H.H.)
| | - Kojiro Tanimoto
- Department of Cardiology, National Hospital Organization Tokyo Medical Center, Japan (K.T.)
| | - Tadateru Iwayama
- Department of Cardiology, Okitama Public General Hospital, Yamagata, Japan (T.I.)
| | - Suguru Chiba
- Department of Cardiology, Urasoe General Hospital, Okinawa (S.C.)
| | - Akinori Sato
- Cardiovascular Center, Tachikawa General Hospital, Niigata, Japan (A.S.)
| | - Yukio Sekiguchi
- Department of Cardiology, Sakakibara Heart Institute, Tokyo, Japan (Y.S., J.N.)
| | - Kenta Sugiura
- Department of Cardiology and Geriatrics, Kochi University, Kerala, India (K.S., T. Hirota)
| | - Shinsuke Iwai
- Department of Cardiology, Hiratsuka Kyosai Hospital, Kanagawa (S.I., N.K.)
| | - Yuhei Isonaga
- Department of Cardiology, Japanese Red Cross Musashino Hospital, Tokyo (Y.I., O.I., T. Horie, Y.N.)
| | - Naoyuki Miwa
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Ibaraki, Japan (N.M., H.H.)
| | - Nobutaka Kato
- Department of Cardiology, Hiratsuka Kyosai Hospital, Kanagawa (S.I., N.K.)
| | - Osamu Inaba
- Department of Cardiology, Japanese Red Cross Musashino Hospital, Tokyo (Y.I., O.I., T. Horie, Y.N.)
| | - Takayoshi Hirota
- Department of Cardiology and Geriatrics, Kochi University, Kerala, India (K.S., T. Hirota)
| | - Yasutoshi Nagata
- Department of Cardiology, Japanese Red Cross Musashino Hospital, Tokyo (Y.I., O.I., T. Horie, Y.N.)
| | - Yuichi Ono
- Department of Cardiology, Ome Municipal General Hospital, Tokyo, Japan (K.Y., Y.O.)
| | - Hitoshi Hachiya
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Ibaraki, Japan (N.M., H.H.)
| | - Yasuteru Yamauchi
- Department of Cardiology, Japanese Red Cross Yokohama City Bay Hospital, Kanagawa (Y.S., Y.Y.)
| | - Masahiko Goya
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Japan (S.M., M.G., T.S.)
| | - Junichi Nitta
- Department of Cardiology, Sakakibara Heart Institute, Tokyo, Japan (Y.S., J.N.)
| | - Hiroshi Tada
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Japan (M. Mukai, H.T.)
| | - Tetsuo Sasano
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Japan (S.M., M.G., T.S.)
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Higuchi K, Iwai S, Kato N, Muramoto H, Onishi Y, Yokoyama Y, Hirao K, Sasano T. The utility of combining continuous wavelet transform analysis and high-density voltage map in predicting the long-term outcomes after ablation of persistent atrial fibrillation. J Interv Card Electrophysiol 2023; 66:405-416. [PMID: 35948727 DOI: 10.1007/s10840-022-01337-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/03/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Continuous wavelet transform (CWT) analysis is a frequency analysis to detect areas of stable high-frequent activity (stable pseudo frequency [sPF]) during atrial fibrillation (AF). As previously reported, patients with the highest sPF area in pulmonary veins (PV) showed better short-term outcomes after PV isolation (PVI). This study sought to evaluate the efficacy of CWT analysis in predicting the long-term (2 years) outcomes after PVI. We also combined the left atrial (LA) voltage map with CWT analysis to further predict the outcome. METHODS Persistent AF patients (n = 109, age 65 ± 10) underwent a CWT analysis at PVs and 8 LA sites during AF for pre-PVI analysis. After PVI during AF, CWT analysis was performed again in the LA as post-PVI analysis and was compared with pre-PVI analysis. A sinus voltage map of LA was created after cardioversion. RESULTS Seventy patients had the highest sPF within PVs (PV-dominant group), while 39 patients had the highest sPF outside PVs (LA-dominant group). The global frequency in the LA showed a significant decrease after PVI only in PV-dominant group (6.55 ± 0.27 to 6.43 ± 0.37, P < 0.01). AF-free survival was better in PV-dominant group than LA-dominant group at 2-year follow-up (87.1% vs. 64.3%, P < 0.002). This trend was recognized throughout all degrees of low voltage area in the LA (LA-LVA), and AF-free survival was well predicted by combining CWT analysis and LA-LVA. CONCLUSIONS By combining CWT analysis and sinus LA-LVA, the long-term AF-free survival after PVI was well stratified and predicted.
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Affiliation(s)
- Koji Higuchi
- Department of Cardiology, Hiratsuka Kyosai Hospital, 9-11 Oiwake Hiratsuka, Kanagawa, Japan.
| | - Shinsuke Iwai
- Department of Cardiology, Hiratsuka Kyosai Hospital, 9-11 Oiwake Hiratsuka, Kanagawa, Japan
| | - Nobutaka Kato
- Department of Cardiology, Hiratsuka Kyosai Hospital, 9-11 Oiwake Hiratsuka, Kanagawa, Japan
| | - Hirotaka Muramoto
- Department of Cardiology, Hiratsuka Kyosai Hospital, 9-11 Oiwake Hiratsuka, Kanagawa, Japan
| | - Yuko Onishi
- Department of Cardiology, Hiratsuka Kyosai Hospital, 9-11 Oiwake Hiratsuka, Kanagawa, Japan
| | - Yasuhiro Yokoyama
- Department of Cardiology, St. Luke's International Hospital, Tokyo, Japan
| | - Kenzo Hirao
- Department of Cardiology, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tetsuo Sasano
- Department of Cardiology, Tokyo Medical and Dental University, Tokyo, Japan
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7
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Thiyagarajah A, Mahajan R, Iwai S, Gupta A, Linz D, Chim I, Emami M, Kadhim K, O'Shea C, Middeldorp ME, Lau DH, Sanders P. Single Ring Isolation For Atrial Fibrillation Ablation: Impact of the Learning Curve. J Cardiovasc Electrophysiol 2022; 33:608-617. [DOI: 10.1111/jce.15387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 12/08/2021] [Accepted: 12/16/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Anand Thiyagarajah
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Rajiv Mahajan
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Lyell McEwin HospitalAdelaideAustralia
| | - Shinsuke Iwai
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Aashray Gupta
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Dominik Linz
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Ivana Chim
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Mehrdad Emami
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Kadhim Kadhim
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Catherine O'Shea
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Melissa E. Middeldorp
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Dennis H. Lau
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
| | - Prashanthan Sanders
- Centre for Heart Rhythm Disorders, University of AdelaideAdelaideAustralia
- Department of Cardiology, Royal Adelaide HospitalAdelaideAustralia
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8
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Fitzgerald JL, Pitman BM, Thiyagarajah A, Emami M, Iwai S, Kadhim K, O'Shea C, Noubiap JJ, Wong CX, Gallagher C, Lau DH, Sanders P. B-PO03-210 UNIDIRECTIONAL BLOCK DURING SINGLE RING ISOLATION OF THE POSTERIOR LEFT ATRIUM. Heart Rhythm 2021. [DOI: 10.1016/j.hrthm.2021.06.683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Pitman BM, Chew SH, Wong CX, Jaghoori A, Iwai S, Lyrtzis E, Lim M, Chew R, Chew A, Sanders P, Lau DH. B-PO01-001 ATRIAL FIBRILLATION PREVALENCE AND RISK FACTORS IN A SEMI-RURAL AFRICAN POPULATION: THE TEFF-AF STUDY. Heart Rhythm 2021. [DOI: 10.1016/j.hrthm.2021.06.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Pitman BM, Chew SH, Wong CX, Jaghoori A, Iwai S, Thomas G, Chew A, Sanders P, Lau DH. Performance of a Mobile Single-Lead Electrocardiogram Technology for Atrial Fibrillation Screening in a Semirural African Population: Insights From "The Heart of Ethiopia: Focus on Atrial Fibrillation" (TEFF-AF) Study. JMIR Mhealth Uhealth 2021; 9:e24470. [PMID: 34009129 PMCID: PMC8173399 DOI: 10.2196/24470] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/21/2020] [Accepted: 12/12/2020] [Indexed: 01/22/2023] Open
Abstract
Background Atrial fibrillation (AF) screening using mobile single-lead electrocardiogram (ECG) devices has demonstrated variable sensitivity and specificity. However, limited data exists on the use of such devices in low-resource countries. Objective The goal of the research was to evaluate the utility of the KardiaMobile device’s (AliveCor Inc) automated algorithm for AF screening in a semirural Ethiopian population. Methods Analysis was performed on 30-second single-lead ECG tracings obtained using the KardiaMobile device from 1500 TEFF-AF (The Heart of Ethiopia: Focus on Atrial Fibrillation) study participants. We evaluated the performance of the KardiaMobile automated algorithm against cardiologists’ interpretations of 30-second single-lead ECG for AF screening. Results A total of 1709 single-lead ECG tracings (including repeat tracing on 209 occasions) were analyzed from 1500 Ethiopians (63.53% [953/1500] male, mean age 35 [SD 13] years) who presented for AF screening. Initial successful rhythm decision (normal or possible AF) with one single-lead ECG tracing was lower with the KardiaMobile automated algorithm versus manual verification by cardiologists (1176/1500, 78.40%, vs 1455/1500, 97.00%; P<.001). Repeat single-lead ECG tracings in 209 individuals improved overall rhythm decision, but the KardiaMobile automated algorithm remained inferior (1301/1500, 86.73%, vs 1479/1500, 98.60%; P<.001). The key reasons underlying unsuccessful KardiaMobile automated rhythm determination include poor quality/noisy tracings (214/408, 52.45%), frequent ectopy (22/408, 5.39%), and tachycardia (>100 bpm; 167/408, 40.93%). The sensitivity and specificity of rhythm decision using KardiaMobile automated algorithm were 80.27% (1168/1455) and 82.22% (37/45), respectively. Conclusions The performance of the KardiaMobile automated algorithm was suboptimal when used for AF screening. However, the KardiaMobile single-lead ECG device remains an excellent AF screening tool with appropriate clinician input and repeat tracing. Trial Registration Australian New Zealand Clinical Trials Registry ACTRN12619001107112; https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=378057&isReview=true
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Affiliation(s)
- Bradley M Pitman
- Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, Australia
| | | | - Christopher X Wong
- Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, Australia
| | - Amenah Jaghoori
- Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, Australia
| | - Shinsuke Iwai
- Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, Australia
| | - Gijo Thomas
- Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, Australia
| | | | - Prashanthan Sanders
- Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, Australia
| | - Dennis H Lau
- Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, Australia
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11
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Thiyagarajah A, Mahajan R, Iwai S, Griffin A, Mishima RS, Linz D, Emami M, Kadhim K, O'Shea CJ, Middeldorp ME, Lau DH, Sanders P. Single Ring Isolation With Inferior Line Sparing for Atrial Fibrillation: A Proof-of-Concept Study. Circ Arrhythm Electrophysiol 2021; 14:e009552. [PMID: 33858182 DOI: 10.1161/circep.120.009552] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Anand Thiyagarajah
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Rajiv Mahajan
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Lyell McEwin Hospital, Adelaide, Australia (R.M.)
| | - Shinsuke Iwai
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Andrew Griffin
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Ricardo S Mishima
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Dominik Linz
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Mehrdad Emami
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Kadhim Kadhim
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Catherine J O'Shea
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Melissa E Middeldorp
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Dennis H Lau
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
| | - Prashanthan Sanders
- Centre for Heart Rhythm Disorders, University of Adelaide, Australia (A.T., R.M., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
- Department of Cardiology, Royal Adelaide Hospital, Australia (A.T., S.I., A.G., R.S.M., D.L., M.E., K.K., C.J.O., M.E.M., D.H.L., P.S.)
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12
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Pitman B, Chew S, Wong C, Jaghoori A, Iwai S, Lyrtzis E, Lim M, Chew R, Chew A, Sanders P, Lau D. Atrial Fibrillation Prevalence and Risk Factors in a Semi-Rural African Population: Findings From the Australian-led TEFF-AF Study. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Okishige K, Kawaguchi N, Iwai S, Yamauchi Y, Keida T, Sasano T, Hirao K, Valderrabano M. Comparative Study of Cryoballoon versus Radiofrequency for Pulmonary Vein Isolation when Combined with vein of Marshall Ethanol Infusion for Paroxysmal Atrial Fibrillation. J Atr Fibrillation 2020; 12:2253. [PMID: 32435354 DOI: 10.4022/jafib.2253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/12/2019] [Accepted: 01/11/2020] [Indexed: 01/08/2023]
Abstract
Introduction Ethanol infusion (EI) in the vein of Marshall (VOM) has multifactorial effects that could be synergistic to pulmonary vein isolation (PVI) in ablation of atrial fibrillation (AF). The efficacy of radiofrequency (RF) versus cryoablation when combined with a VOM-EI has never been investigated. The aim of this study is to evaluate outcome differences of AF ablation using RF versus cryoablation when combined with a VOM-EI. Materials and Methods Consecutive patients (n=132) underwent catheter ablation of paroxysmal AF with either RF or cryoballoon (CB) for PVI combined with VOM-EI. Bi-directional conduction block at the mitral isthmus was attempted. The end-point was the freedom from any atrial arrhythmias documented after a blanking period of 90 days after the procedure. Results Kaplan-Meier estimates of the arrhythmia-free survival after 1 year were 63.8 (RF + VOM), and 82.7 % (CB + VOM), respectively. Comparison between CB + VOM versus RF + VOM reached a significance (p=0.0292). The periprocedural complication rate was comparable in both groups (5.0 % RF, 5.8 % CB; p=0.14) with a significant difference in the incidence of phrenic nerve palsy (0 % RF, 2.0 % CB; p<0.05). Conclusions PVI with a CB had an increased freedom from AF recurrence compared to RF combined with VOM-EI. The present results suggest a potential additive effect of a VOM-EI to CB application.
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Affiliation(s)
- Kaoru Okishige
- Heart Center, Japan Red Cross Yokohama City Bay Hospital, Yokohama, Japan.,Division of Cardiology, Edogawa Hospital.,Arrhythmia Center, Tokyo Medical and Dental University.,Division of Cardiac Electrophysiology, Methodist DeBakey Heart and Vascular Center and Houston Methodist Research Institute, Houston, TX
| | - Naohiko Kawaguchi
- Heart Center, Japan Red Cross Yokohama City Bay Hospital, Yokohama, Japan.,Division of Cardiology, Edogawa Hospital.,Arrhythmia Center, Tokyo Medical and Dental University.,Division of Cardiac Electrophysiology, Methodist DeBakey Heart and Vascular Center and Houston Methodist Research Institute, Houston, TX
| | - Shinsuke Iwai
- Heart Center, Japan Red Cross Yokohama City Bay Hospital, Yokohama, Japan.,Division of Cardiology, Edogawa Hospital.,Arrhythmia Center, Tokyo Medical and Dental University.,Division of Cardiac Electrophysiology, Methodist DeBakey Heart and Vascular Center and Houston Methodist Research Institute, Houston, TX
| | | | | | - Tetsuo Sasano
- Arrhythmia Center, Tokyo Medical and Dental University
| | - Kenzo Hirao
- Division of Cardiac Electrophysiology, Methodist DeBakey Heart and Vascular Center and Houston Methodist Research Institute, Houston, TX
| | - Miguel Valderrabano
- Heart Center, Japan Red Cross Yokohama City Bay Hospital, Yokohama, Japan.,Division of Cardiology, Edogawa Hospital.,Arrhythmia Center, Tokyo Medical and Dental University.,Division of Cardiac Electrophysiology, Methodist DeBakey Heart and Vascular Center and Houston Methodist Research Institute, Houston, TX
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14
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Munawar DA, Chan JEZ, Emami M, Kadhim K, Khokhar K, O’Shea C, Iwai S, Pitman B, Linz D, Munawar M, Roberts-Thomson K, Young GD, Mahajan R, Sanders P, Lau DH. Magnetic resonance imaging in non-conditional pacemakers and implantable cardioverter-defibrillators: a systematic review and meta-analysis. Europace 2020; 22:288-298. [DOI: 10.1093/europace/euz343] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 11/30/2019] [Indexed: 11/12/2022] Open
Abstract
Abstract
Aims
There is growing evidence that magnetic resonance imaging (MRI) scanning in patients with non-conditional cardiac implantable electronic devices (CIEDs) can be performed safely. Here, we aim to assess the safety of MRI in patients with non-conditional CIEDs.
Methods and results
English scientific literature was searched using PubMed/Embase/CINAHL with keywords of ‘magnetic resonance imaging’, ‘pacemaker’, ‘implantable defibrillator’, and ‘cardiac resynchronization therapy’. Studies assessing outcomes of adverse events or significant changes in CIED parameters after MRI scanning in patients with non-conditional CIEDs were included. References were excluded if the MRI conditionality of the CIEDs was undisclosed; number of patients enrolled was <10; or studies were case reports/series. 35 cohort studies with a total of 5625 patients and 7196 MRI scans (0.5–3 T) in non-conditional CIEDs were included. The overall incidence of lead failure, electrical reset, arrhythmia, inappropriate pacing and symptoms related to pocket heating, or torque ranged between 0% and 1.43%. Increase in pacing lead threshold >0.5 V and impedance >50Ω was seen in 1.1% [95% confidence interval (CI) 0.7–1.8%] and 4.8% (95% CI 3.3–6.4%) respectively. The incidence of reduction in P- and R-wave sensing by >50% was 1.5% (95% CI 0.6–2.9%) and 0.4% (95% CI 0.06–1.1%), respectively. Battery voltage reduction of >0.04 V was reported in 2.2% (95% CI 0.2–6.1%).
Conclusion
This meta-analysis affirms the safety of MR imaging in non-conditional CIEDs with no death or implantable cardioverter-defibrillator shocks and extremely low incidence of lead or device-related complications.
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Affiliation(s)
- Dian A Munawar
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Joel E Z Chan
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Mehrdad Emami
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Kadhim Kadhim
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Kashif Khokhar
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Catherine O’Shea
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Shinsuke Iwai
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Bradley Pitman
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Dominik Linz
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Muhammad Munawar
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Kurt Roberts-Thomson
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Glenn D Young
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Rajiv Mahajan
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
- Department of Cardiology, Lyell McEwin Hospital, Adelaide, Australia
| | - Prashanthan Sanders
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
| | - Dennis H Lau
- Department of Cardiology, Royal Adelaide Hospital and Centre for Heart Rhythm Disorders, University of Adelaide, 1 Port Road, Adelaide SA 5000, Australia
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15
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Pitman B, Chew S, Wong C, Jaghoori A, Iwai S, Chew A, Sanders P, Lau D. 009 Performance of a Mobile Single-Lead Electrocardiogram Technology for Atrial Fibrillation Screening in a Semi-Rural African Population: Insights from the Australian Led TEFF-AF Study. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Higuchi K, Iwai S, Yokoyama Y, Hirao K. Persistent left superior vena cava as a perpetuator of atrial fibrillation: Frequency analysis using continuous wavelet transform analysis. J Cardiovasc Electrophysiol 2019; 30:1701-1705. [PMID: 31165514 DOI: 10.1111/jce.14004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 05/18/2019] [Accepted: 05/29/2019] [Indexed: 12/01/2022]
Affiliation(s)
- Koji Higuchi
- Department of Cardiovascular Medicine, Hiratsuka Kyosai Hospital, Hiratsuka, Kanagawa, Japan
| | - Shinsuke Iwai
- Department of Cardiovascular Medicine, Hiratsuka Kyosai Hospital, Hiratsuka, Kanagawa, Japan
| | - Yasuhiro Yokoyama
- Department of Cardiovascular Medicine, St Luke's Hospital, Tokyo, Japan
| | - Kenzo Hirao
- Heart Rhythm Center, Tokyo Medical and Dental University, Tokyo, Japan
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17
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Imai T, Fujita Y, Motoki A, Takaoka H, Kanesaki T, Ota Y, Iwai S, Chisoku H, Ohmae M, Sumi T, Nakazawa M, Uzawa N. Surgical approaches for condylar fractures related to facial nerve injury: deep versus superficial dissection. Int J Oral Maxillofac Surg 2019; 48:1227-1234. [PMID: 30833093 DOI: 10.1016/j.ijom.2019.02.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/10/2019] [Accepted: 02/14/2019] [Indexed: 11/26/2022]
Abstract
The aim of this study was to investigate the probability of facial nerve injury (FNI) in the treatment of condylar neck and subcondylar fractures (CN/SCFs) with percutaneous approaches and to identify factors predicting FNI. The data of 80 patients with 87 CN/SCFs were evaluated retrospectively. The primary outcome was FNI occurrence. The predictor variables were age, sex, aetiology, alcohol consumption, fracture site and pattern (dislocation or not), concomitant fractures, time interval to surgery, surgeon experience, plate type, and the dual classification of percutaneous approaches. The approaches were classified based on whether subcutaneous dissection traversed the marginal mandibular branch (MMB) deeply (deep group: submandibular and retroparotid approaches) or superficially (superficial group: transparotid, transmasseteric anteroparotid (TMAP), and high cervical-TMAP approaches). Twenty-two patients (27.5%) suffered FNI, of whom two in the deep group had permanent paralysis of the MMB. In the multivariate logistic regression model, deeply traversing surgery approaches (odds ratio 12.4, P=0.025) and the presence of a dislocated fracture (odds ratio 6.66, P=0.012) were associated with an increased risk of FNI. These results suggest that percutaneous approaches in the superficial group should be recommended for the treatment of CN/SCFs to reduce the risk of FNI.
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Affiliation(s)
- T Imai
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan; Department of Oral and Maxillofacial Surgery, Saiseikai Senri Hospital, Suita, Osaka, Japan.
| | - Y Fujita
- Department of Oral and Maxillofacial Surgery, Toyonaka Municipal Hospital, Toyonaka, Osaka, Japan
| | - A Motoki
- Department of Oral and Maxillofacial Surgery, Rinku General Medical Centre, Izumisano, Osaka, Japan
| | - H Takaoka
- Department of Oral and Maxillofacial Surgery, Higashiosaka City Medical Centre, Higashiosaka, Osaka, Japan
| | - T Kanesaki
- Department of Oral and Maxillofacial Surgery, Saiseikai Senri Hospital, Suita, Osaka, Japan; Department of Oral and Maxillofacial Surgery, Toyonaka Municipal Hospital, Toyonaka, Osaka, Japan
| | - Y Ota
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan; Department of Oral and Maxillofacial Surgery, Itami City Hospital, Itami, Hyogo, Japan
| | - S Iwai
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - H Chisoku
- Department of Oral and Maxillofacial Surgery, Higashiosaka City Medical Centre, Higashiosaka, Osaka, Japan
| | - M Ohmae
- Department of Oral and Maxillofacial Surgery, Rinku General Medical Centre, Izumisano, Osaka, Japan
| | - T Sumi
- Department of Oral and Maxillofacial Surgery, Toyonaka Municipal Hospital, Toyonaka, Osaka, Japan
| | - M Nakazawa
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - N Uzawa
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
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18
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Iwai S, Worthley S, Sanders P, Young G. Percutaneous Left Atrial Appendage Closure: Single Centre Experience using Three Different Devices. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Iwai S, Kishimoto S, Nishiyama K, Matsusaki M, Akagi T, Akashi M. PO-242 Novel analysis of cancer cell invasion using a three-dimensional cultured tissue model mimics human tissue organisation. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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20
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Ueda Y, Torrianni MW, Coppin CM, Iwai S, Sawa Y, Matsuda H. Antigen Clearing from Porcine Heart Valves with Preservation of Structural Integrity. Int J Artif Organs 2018; 29:781-9. [PMID: 16969756 DOI: 10.1177/039139880602900808] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bioprostheses currently used for replacement of diseased cardiovascular tissue are preserved and partially protected from immune rejection through chemical fixation. However, after implantation, chemically preserved (fixed) material has limited durability and lacks the ability to revitalize through cellular ingrowth and remodeling. As an alternative to fixation, we aimed at thoroughly removing antigens from tissue, leaving an intact scaffold, suitable for integration and revitalization in the host. Extensive washing of porcine heart valves with a mixture of two detergents (SDS and Triton X-100) yielded an intact matrix devoid of cells and depleted of soluble proteins that was minimally immunogenic in rabbits. A detailed characterization of the biomechanics and durability of the tissue is under way. If the lack of immunogenicity is confirmed in primates, our results would suggest that a detergent-washed, unfixed porcine heart valve can be an attractive non-inflammatory scaffold for heart valve regeneration in humans.
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Affiliation(s)
- Y Ueda
- Medtronic Heart Valve, Santa Ana, California, USA
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Inokuchi R, Maehara H, Iwai S, Yamaguchi Y, Asada T, Doi K, Morimura N. 135 Interface Design Dividing Physical Findings Into Medical and Trauma Findings Facilitates Clinical Document Entry in the Emergency Department: A Prospective Observational Study. Ann Emerg Med 2017. [DOI: 10.1016/j.annemergmed.2017.07.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Toya C, Muramoto H, Iwai S, Higuchi K, Tsunamoto H, Matsumoto S, Ozawa T, Araki K, Ohnishi T, Kobayashi I, Ohnishi Y, Umezawa S, Niwa A, Hirao K. 1680The assessment of left atrial appendage flow by computed tomography using serial snapshots method. Europace 2017. [DOI: 10.1093/ehjci/eux160.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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23
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Higuchi K, Toya C, Iwai S, Muramoto H, Tsunamoto H, Matsumoto S, Ozawa T, Onishi T, Kobayashi I, Onishi Y, Umezawa S, Niwa A, Yokoyama Y, Hirao K. P871Changes in continuous wavelet transform of left atrium before and after pulmonary vein isolation in patients with persistent atrial fibrillation. Europace 2017. [DOI: 10.1093/ehjci/eux151.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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24
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Iwai S, Higuchi K, Toya C, Muramoto H, Tsunamoto H, Matsumoto S, Ozawa T, Araki K, Onishi T, Kobayashi I, Onishi Y, Umezawa S, Niwa A, Hirao K. P1401Distributions and correlation of left atrial low voltage zone detected by high density multi-electrode catheter during atrial fibrillation and sinus rhythm. Europace 2017. [DOI: 10.1093/ehjci/eux158.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Iwai S, Higuchi K, Toya C, Muramoto H, Tsunamoto H, Matsumoto S, Ozawa T, Araki K, Onishi T, Kobayashi I, Onishi Y, Umezawa S, Niwa A, Hirao K. P934The electroanatomical characteristics of the patients who need epicardial coronary sinus approach for complete conduction block along mitral isthmus. Europace 2017. [DOI: 10.1093/ehjci/eux151.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Toya C, Higuchi K, Iwai S, Hirotaka M, Tsunamoto H, Matsumoto S, Ozawa T, Araki K, Ohnishi T, Kobayashi I, Ohnishi Y, Umezawa S, Niwa A, Yokoyama Y, Hirao K. P341Comparison of locations between continuous wavelet transform analysis and complex fractionated atrial electrogram in patients with persistent atrial fibrillation. Europace 2017. [DOI: 10.1093/ehjci/eux141.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Iwai S, Takahashi Y, Masumura M, Yamashita S, Doi J, Yamamoto T, Sakakibara A, Nomoto H, Yoshida Y, Sugiyama T, Oumi T, Ohno M, Sato Y, Hirao K, Isobe M. Occurrence of Focal Atrial Tachycardia During the Ablation Procedure Is Associated With Arrhythmia Recurrence After Termination of Persistent Atrial Fibrillation. J Cardiovasc Electrophysiol 2017; 28:489-497. [PMID: 28188960 DOI: 10.1111/jce.13187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/23/2017] [Accepted: 02/06/2017] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Catheter ablation can terminate persistent atrial fibrillation (AF). However, atrial tachycardia (AT) often arises after termination of AF. METHODS AND RESULTS Of 215 patients who underwent index stepwise ablation for persistent AF, 141 (66%) patients (64 ± 9 years) in whom AF terminated during the ablation procedure were studied. If AF converted into AT, ablation for AT was subsequently performed. ATs were categorized as focal or macroreentrant AT. We assessed whether type of AT occurring after conversion of AF during the ablation procedure was associated with freedom from atrial tachyarrhythmia (AF or AT) during follow-up. Sinus rhythm was directly restored from AF in 37 patients, while 34, 37, and 33 patients had focal AT alone, a mix of focal and macroreentrant AT, and macroreentrant AT alone after termination of AF, respectively. Arrhythmia-free survival rates at 1 year after the index procedure were 30%, 34%, 61%, and 59% in the patients with focal AT alone, a mix of focal AT and macroreentrant AT, macroreentrant AT alone, and direct restoration of sinus rhythm, respectively (P = 0.004). Type of AT occurring during the index procedure was associated with type of recurrent AT (P = 0.03), but the origin of focal AT occurring during the index ablation differed from that of the recurrent AT in 85% of patients. CONCLUSION In patients who had AF termination by ablation, occurrence of focal AT during the ablation procedure was associated with worse clinical outcome than occurrence of macroreentrant AT, likely due to ATs arising from other foci during follow-up.
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Affiliation(s)
- Shinsuke Iwai
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan.,Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshihide Takahashi
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Mayumi Masumura
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Syu Yamashita
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Junichi Doi
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Tasuku Yamamoto
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Atsushi Sakakibara
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Hidetsugu Nomoto
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Yoshinori Yoshida
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Tomoyo Sugiyama
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Tetsuo Oumi
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Masakazu Ohno
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Yasuhiro Sato
- Department of Cardiovascular Medicine, Disaster Medical Center, Tokyo, Japan
| | - Kenzo Hirao
- Heart Rhythm Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mitsuaki Isobe
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan
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Takasu A, Masui A, Hamada M, Imai T, Iwai S, Yura Y. Immunogenic cell death by oncolytic herpes simplex virus type 1 in squamous cell carcinoma cells. Cancer Gene Ther 2016; 23:107-13. [PMID: 26987291 DOI: 10.1038/cgt.2016.8] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 02/15/2016] [Accepted: 02/19/2016] [Indexed: 02/06/2023]
Abstract
Molecules essential for the induction of immunogenic cell death (ICD) are called damage-associated molecular patterns (DAMPs). The effects of oncolytic herpes simplex virus type 1 (HSV-1) on the production of DAMPs were examined in squamous cell carcinoma (SCC) cells. The cytopathic effects of HSV-1 RH2 were observed in mouse SCCVII cells infected at a high multiplicity of infection (MOI), and the amounts of viable cells were decreased. After being infected with RH2, ATP and high mobility group box 1 (HMGB1) were released extracellulary, while calreticulin (CRT) translocated to the cell membrane. A flow-cytometric analysis revealed an increase in the number of annexin-V and propidium iodide (PI)-stained cells; and the amount of cleaved poly (ADP-ribose) polymerase (PARP) was increased. The killing effect of RH2 was reduced by pan-caspase inhibitor z-VAD-fmk and the caspase-1 inhibitor z-YVAD-fmk, suggesting the involvement of apoptosis and pyroptosis. In C3H mice bearing synergic SCCVII tumors, the growth of tumors injected with the supernatant of RH2-infected cells was less than that of tumors injected with phosphate-buffered saline (PBS). These results indicate that oncolytic HSV-1 RH2 produces DAMPs from SCC cells to induce cell death. This may contribute to the enhancement of tumor immunity by oncolytic HSV-1.
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Affiliation(s)
- A Takasu
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - A Masui
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - M Hamada
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - T Imai
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - S Iwai
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Y Yura
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
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Avilés-Jiménez F, Guitron A, Segura-López F, Méndez-Tenorio A, Iwai S, Hernández-Guerrero A, Torres J. Microbiota studies in the bile duct strongly suggest a role for Helicobacter pylori in extrahepatic cholangiocarcinoma. Clin Microbiol Infect 2015; 22:178.e11-178.e22. [PMID: 26493848 DOI: 10.1016/j.cmi.2015.10.008] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/01/2015] [Accepted: 10/05/2015] [Indexed: 02/07/2023]
Abstract
Biliary tract cancer or extrahepatic cholangiocarcinoma (ECCA) represents the sixth commonest cause of cancer in the gastrointestinal tract in western countries. We aimed to characterize the microbiota and its predicted associated functions in the biliary tract of ECCA and benign biliary pathology (BBP). Samples were taken from 100 patients with ECCA and 100 patients with BBP by endoscopic cholangio-pancreatography for DNA extraction. Ten patients with ECCA and ten with BBP were selected for microbiota studies using the V4-16S rRNA gene and sequenced in Illumina platform. Microbiota analyses included sample-to-sample distance metrics, ordination/clustering and prediction of functions. Presence of Nesterenkonia sp. and Helicobacter pylori cagA and vacA genes were tested in the 100 ECCA and 100 BBP samples. Phylum Proteobacteria dominated all samples (60.4% average). Ordination multicomponent analyses showed significant microbiota separation between ECCA and BBP (p 0.010). Analyses of 4002 operational taxonomic units with presence variation in at least one category probed a separation of ECCA from BBP. Among these, Nesterenkonia decreased, whereas Methylophilaceae, Fusobacterium, Prevotella, Actinomyces, Novosphingobium and H. pylori increased in ECCA. Predicted associated functions showed increased abundance of H. pylori virulence genes in ECCA. cagA and vacA genes were confirmed by PCR in ECCA and BBP samples. This is the first microbiota report in ECCA and BBP to show significant changes in microbial composition. Bacterial species unusual for human flora were found: Methylophilaceae and Nesterenkonia are reported in hypersaline soils, and Mesorhizobium is a nitrogen-fixing bacterium. Enrichment of virulence genes confirms previous studies suggesting that H. pylori might be associated with ECCA.
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Affiliation(s)
- F Avilés-Jiménez
- Unidad de Investigación en Enfermedades Infecciosas, UMAE Pediatría, IMSS, Mexico
| | - A Guitron
- Departamento de Endoscopía Digestiva, UMAE 71 IMSS, Coahuila, Mexico
| | - F Segura-López
- Departamento de Anestesiología, UMAE 71 IMSS, Coahuila, Mexico
| | - A Méndez-Tenorio
- Laboratorio de Biotecnología y Bioinformática Genómica, ENCB, Instituto Politécnico Nacional, Mexico
| | - S Iwai
- Second Genome, South San Francisco, CA, USA
| | | | - J Torres
- Unidad de Investigación en Enfermedades Infecciosas, UMAE Pediatría, IMSS, Mexico.
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Iwai S, Takeshita A, Kishimoto S, Morita Y, Niki-Yonekawa A, Hamada M, Yura Y. 178 Wnt5b promotes the cell invasion and migration essential to the metastasis of oral squamous cell carcinoma cell through activation of Cdc42 and RhoA. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30075-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Chiba J, Aoki S, Yamamoto J, Iwai S, Inouye M. Deformable nature of various damaged DNA duplexes estimated by an electrochemical analysis on electrodes. Chem Commun (Camb) 2015; 50:11126-8. [PMID: 25105179 DOI: 10.1039/c4cc04513k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We report bending flexibility of damaged duplexes possessing an apurinic/apyrimidinic (AP) site analogue, a cyclobutane pyrimidine dimer (CPD), and a pyrimidine(6-4)pyrimidone photoproduct (6-4PP). Based on the electrochemical evaluation on electrodes, the duplex flexibilities of the lesions increased in the following order: CPD < AP < 6-4PP. We discussed the possibility that the emerging local flexibility might be a good sign for UV-damaged DNA-binding proteins on duplexes.
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Affiliation(s)
- J Chiba
- Graduate School of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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Takahashi K, Ogura N, Tomoki R, Eda T, Okada H, Kato R, Iwai S, Ito K, Kuyama K, Kondoh T. Applicability of human dental follicle cells to bone regeneration without dexamethasone: an in vivo pilot study. Int J Oral Maxillofac Surg 2015; 44:664-9. [DOI: 10.1016/j.ijom.2014.11.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 10/27/2014] [Accepted: 11/07/2014] [Indexed: 11/24/2022]
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Ohtsubo T, Nishioka K, Imaiso Y, Iwai S, Shimokawa H, Oda H, Fujiwara T, Nakabeppu Y. Identification of human MutY homolog (hMYH) as a repair enzyme for 2-hydroxyadenine in DNA and detection of multiple forms of hMYH located in nuclei and mitochondria. Nucleic Acids Res 2015; 43:3870-1. [PMID: 25800745 PMCID: PMC4402549 DOI: 10.1093/nar/gkv264] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Iwai S, Sakonju I, Okano S, Teratani T, Kasahara N, Yokote S, Yokoo T, Kobayash E. Impact of ex vivo administration of mesenchymal stem cells on the function of kidney grafts from cardiac death donors in rat. Transplant Proc 2015; 46:1578-84. [PMID: 24935331 DOI: 10.1016/j.transproceed.2013.12.068] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 10/09/2013] [Accepted: 12/16/2013] [Indexed: 12/12/2022]
Abstract
BACKGROUND Mesenchymal stem cells (MSCs) have been applied to the treatment of various diseases, and MSC administration in marginal donor grafts may help avoid the ischemia-reperfusion injury associated with solid organ transplants. Given the reports of side effects after intravenous MSC administration, local MSC administration to the target organ might be a better approach. We administered adipose tissue-derived MSCs (AT-MSCs) ex vivo to donor rat kidneys obtained after cardiac death (CD). METHODS Using male Lewis rats (8-10 weeks), and a marginal transplant model of 1hr CD plus 1hr sub-normothermic ET-Kyoto solution preservation were conducted. AT-MSCs obtained from double-reporter (luciferase-LacZ) transgenic Lewis rats were injected either systemically (1.0 × 10(6) cells/0.5 mL) to bilaterally nephrectomized recipient rats that had received a marginal kidney graft (n = 6), or locally via the renal artery (500 μL ET-Kyoto solution containing the same number of AT-MSCs) to marginal kidney grafts, which were then preserved (1 hour; 22°C) before being transplanted into bilaterally nephrectomized recipient rats (n = 8). Serum was collected to assess the therapeutic effects of AT-MSC administration, and the recipients of rats surviving to Day 14 were separately evaluated histopathologically. Follow-up was by in vivo imaging and histological LacZ staining, and tumor formation was evaluated in MSC-injected rats at 3 months. RESULTS Systemic injection of MSC did not improve recipient survival. In vivo imaging showed MSCs trapped in the lung that later became undetectable. Ex vivo injection of MSCs did show a benefit without adverse effects. At Day 14 after RTx, 75% of the rats in the AT-MSC-injected group (MSC[+]) had survived, whereas 50% of the rats in the AT-MSC-non-injected group (MSC[-]) had died. Renal function in the MSC(+) group was improved compared with that in the MSC(-) group at Day 4. LacZ staining revealed AT-MSCs attached to the renal tubules at 24 hours after RTx that later became undetectable. Histopathologic examination showed little difference in fibrosis between the groups at Day 14. No teratomas or other abnormalities were seen at 3 months.
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Affiliation(s)
- S Iwai
- Laboratory of Small Animal Surgery I, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan.
| | - I Sakonju
- Laboratory of Small Animal Surgery I, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - S Okano
- Laboratory of Small Animal Surgery II, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - T Teratani
- Division of Development of Advanced Therapy, Center for Development of Advanced Medical Technology, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - N Kasahara
- Division of Development of Advanced Therapy, Center for Development of Advanced Medical Technology, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - S Yokote
- Department of Internal Medicine, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - T Yokoo
- Department of Internal Medicine, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - E Kobayash
- Division of Development of Advanced Therapy, Center for Development of Advanced Medical Technology, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Eda T, Takahashi K, Iwai S, Tomoki R, Okada H, Ito K, Kuyama K, Suemitu M, Ogura N, Tukahara H, Kondoh T. Effect of Plasma Rich in Growth Factors and Platelet-Rich Plasma on Bone Formation in Rat Calvaria. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yura Y, Okunaga S, Takasu A, Hamada M, Iwai S. Low-intensity ultrasound as a method to improve the effect of oncolytic virotherapy on oral cancer. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
It has recently been reported that the transverse acetabular ligament (TAL) is helpful in determining the position of the acetabular component in total hip replacement (THR). In this study we used a computer-assisted navigation system to determine whether the TAL is useful as a landmark in THR. The study was carried out in 121 consecutive patients undergoing primary THR (134 hips), including 67 dysplastic hips (50%). There were 26 men (29 hips) and 95 women (105 hips) with a mean age of 60.2 years (17 to 82) at the time of operation. After identification of the TAL, its anteversion was measured intra-operatively by aligning the inferomedial rim of the trial acetabular component with the TAL using computer-assisted navigation. The TAL was identified in 112 hips (83.6%). Intra-observer reproducibility in the measurement of anteversion of the TAL was high, but inter-observer reproducibility was moderate. Each surgeon was able to align the trial component according to the target value of the angle of anteversion of the TAL, but it was clear that methods may differ among surgeons. Of the measurements of the angle of anteversion of the TAL, 5.4% (6 of 112 hips) were outliers from the safe zone. In summary, we found that the TAL is useful as a landmark when implanting the acetabular component within the safe zone in almost all hips, and to prevent it being implanted in retroversion in all hips, including dysplastic hips. However, as anteversion of the TAL may be excessive in a few hips, it is advisable to pay attention to individual variations, particularly in those with severe posterior pelvic tilt. Cite this article: Bone Joint J 2014;96-B:306–11.
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Affiliation(s)
- K. Fujita
- Kanazawa University, Department
of Orthopaedic Surgery, Graduate School of Medical
Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
| | - T. Kabata
- Kanazawa University, Department
of Orthopaedic Surgery, Graduate School of Medical
Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
| | - T. Maeda
- Kanazawa University, Department
of Orthopaedic Surgery, Graduate School of Medical
Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
| | - Y. Kajino
- Kanazawa University, Department
of Orthopaedic Surgery, Graduate School of Medical
Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
| | - S. Iwai
- Kanazawa University, Department
of Orthopaedic Surgery, Graduate School of Medical
Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
| | - K. Kuroda
- Kanazawa University, Department
of Orthopaedic Surgery, Graduate School of Medical
Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
| | - K. Hasegawa
- Kanazawa University, Department
of Orthopaedic Surgery, Graduate School of Medical
Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
| | - H. Tsuchiya
- Kanazawa University, Department
of Orthopaedic Surgery, Graduate School of Medical
Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
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Fujita K, Kabata T, Maeda T, Kajino Y, Iwai S, Kuroda K, Hasegawa K, Tsuchiya H. The use of the transverse acetabular ligament in total hip replacement: An analysis of the orientation of the trial acetabular component using a navigation system. Bone Joint J 2014. [PMID: 24589783 DOI: 10.1302/0301-620x.96b3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
It has recently been reported that the transverse acetabular ligament (TAL) is helpful in determining the position of the acetabular component in total hip replacement (THR). In this study we used a computer-assisted navigation system to determine whether the TAL is useful as a landmark in THR. The study was carried out in 121 consecutive patients undergoing primary THR (134 hips), including 67 dysplastic hips (50%). There were 26 men (29 hips) and 95 women (105 hips) with a mean age of 60.2 years (17 to 82) at the time of operation. After identification of the TAL, its anteversion was measured intra-operatively by aligning the inferomedial rim of the trial acetabular component with the TAL using computer-assisted navigation. The TAL was identified in 112 hips (83.6%). Intra-observer reproducibility in the measurement of anteversion of the TAL was high, but inter-observer reproducibility was moderate. Each surgeon was able to align the trial component according to the target value of the angle of anteversion of the TAL, but it was clear that methods may differ among surgeons. Of the measurements of the angle of anteversion of the TAL, 5.4% (6 of 112 hips) were outliers from the safe zone. In summary, we found that the TAL is useful as a landmark when implanting the acetabular component within the safe zone in almost all hips, and to prevent it being implanted in retroversion in all hips, including dysplastic hips. However, as anteversion of the TAL may be excessive in a few hips, it is advisable to pay attention to individual variations, particularly in those with severe posterior pelvic tilt.
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Affiliation(s)
- K Fujita
- Kanazawa University, Department of Orthopaedic Surgery, Graduate School of Medical Science, 13-1 Takaramachi, Kanazawa, 920-8641, Japan
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Tani K, Iwai S, Kosako T. Biokinetic analysis code development and applications to visualise the distribution of intake activity. Radiat Prot Dosimetry 2013; 157:323-330. [PMID: 23771957 DOI: 10.1093/rpd/nct153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Measurements for internal dose assessment are required to be conducted based on the distribution of radionuclides in the body, which may change depending on the lapsed time. In this study, a biokinetic analysis code, which can be used in practical radiation control is developed, and the results of (60)Co and (137)Cs biokinetics are visualised as examples by drawing the depositions for each organ and tissue in a figure of the body as a function of lapsed time. In addition, based on visualised biokinetics, precautions for in vivo measurements are also discussed. These discussions led to the conclusion that the information of visualised biokinetics is useful for actual measurements in practical radiation control.
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Affiliation(s)
- K Tani
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
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40
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Meshii N, Takahashi G, Okunaga S, Hamada M, Iwai S, Takasu A, Ogawa Y, Yura Y. Enhancement of systemic tumor immunity for squamous cell carcinoma cells by an oncolytic herpes simplex virus. Cancer Gene Ther 2013; 20:493-8. [PMID: 23887644 DOI: 10.1038/cgt.2013.45] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 06/07/2013] [Accepted: 06/15/2013] [Indexed: 01/13/2023]
Abstract
RH2 is a neurovirulent γ134.5 gene-deficient herpes simplex virus type 1 (HSV-1) with a lytic ability in human squamous cell carcinoma (SCC) cells; it is related to spontaneously occurring HSV-1 mutant HF10. The effect of RH2 on SCC was examined using a syngeneic C3H mouse model. After infection of mouse SCCVII cells with RH2, cell viability was decreased at first, but recovered by prolonged culture, indicating the limited replication of RH2. The antitumor ability of RH2 was examined using a bilateral SCCVII tumor model. The growth of the RH2-injected tumors was suppressed compared with that of phosphate-buffered saline-injected tumors. Moreover, the growth of contralateral tumor of RH2-treated mice was also suppressed significantly. The splenocytes of C3H mice treated with RH2 lysed more SCCVII cells than NFSaY83 cells and YAC-1 cells. The cytotoxicity of the splenocytes on SCCVII cells was significantly greater than that of splenocytes from tumor-bearing mice. Removal of CD8(+) T cells from splenocytes decreased their cell killing activity remarkably. The antitumor effect of RH2 on SCCVII xenografts in nude mice was not demonstrated. These results indicate that RH2 exhibited a suppressive effect on mouse SCC, even if the replication of RH2 was limited. This is ascribed to the ability of RH2 to enhance existing tumor-specific cytotoxic T lymphocyte activity.
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Affiliation(s)
- N Meshii
- Department of Oral and Maxillofacial Surgery, Osaka University Graduate School of Dentistry, Osaka, Japan
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41
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Itoh K, Itoh H, Naka M, Saito S, Hosako I, Yoneyama N, Ishihara S, Sasaki T, Iwai S. Collective excitation of an electric dipole on a molecular dimer in an organic dimer-Mott insulator. Phys Rev Lett 2013; 110:106401. [PMID: 23521274 DOI: 10.1103/physrevlett.110.106401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Revised: 12/21/2012] [Indexed: 06/01/2023]
Abstract
The terahertz response in 10-100 cm(-1) was investigated in an organic dimer-Mott (DM) insulator κ-(ET)(2)Cu(2)(CN)(3) that exhibits a relaxorlike dielectric anomaly. An ~30 cm(-1) band in the optical conductivity was attributable to collective excitation of the fluctuating intradimer electric dipoles that are formed by an electron correlation. We succeeded in observing photoinduced enhancement of this ~30 cm(-1) band, reflecting the growth of the electric dipole cluster in the DM phase. Such optical responses in κ-(ET)(2)Cu(2)(CN)(3) reflect an instability near the boundary between the DM-ferroelectric charge ordered phases.
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Affiliation(s)
- K Itoh
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
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42
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Iwai S, Kawakami Y, Ishikawa T, Sakurai Y, Itoh H, Yamamoto K, Sasaki T. Coherent Electron Dynamics in 10 fs Time Scale in Organic Charge Ordered and Dimer-Mott Insulators. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134103019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Ishikawa T, Yamada K, Itoh H, Iwai S, Arima T, Yamada S, Sasaki T. Photoinduced Coherent Spin Fluctuation in Primary Dynamics of Insulator to Metal Transition in Perovskite Cobalt Oxide. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134103013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kurabayashi M, Okishige K, Asano M, Suzuki H, Shimura T, Iwai S, Kato N, Ihara K, Aoyagi H, Isobe M. Cardiopulmonary arrest caused by coronary spasm after coronary vasodilator withdrawal during the peri-operative period of gastrectomy. Intern Med 2013; 52:81-4. [PMID: 23291678 DOI: 10.2169/internalmedicine.52.8918] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Calcium antagonists, nicorandil and long-acting nitrates are highly effective for preventing coronary spasm. The withdrawal of coronary vasodilators, especially calcium antagonists, is risky in cases of vasospastic angina. We herein present a case of cardiopulmonary arrest that occurred due to coronary spasm triggered by the discontinuation of coronary vasodilators during the peri-operative period of gastrectomy. Vasospastic angina patients who are not able to take oral coronary vasodilators in the peri-operative period should be maintained on a parenteral vasodilator until they are able to take them orally. Physicians should also be aware of the possible development of nitrate tolerance in patients on prolonged nitrate therapy.
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Itoh K, Itoh H, Iwai S, Naka M, Ishihara S, Saito S, Yoneyama N, Sasaki T. Photoinduced Growth of Ferroelectric Charge Order in Organic Dimer-Mott insulator. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134103020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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46
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Kodama M, Iwai S, Onoue M, Yano Y, Takayama T, Yoshimi K, Otsuka H, Hashimoto N, Saeki N, Funato T. Endometrium Thinning by Dienogest before Hysteroscopoic Surgery. J Minim Invasive Gynecol 2012. [DOI: 10.1016/j.jmig.2012.08.677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mazaki T, Ishii Y, Fujii M, Iwai S, Ishikawa K. Mutations of p53, E-cadherin, alpha- and beta-catenin genes and tyrosine phosphorylation of beta-catenin in human gastric carcinomas. Int J Oncol 2012; 9:579-83. [PMID: 21541555 DOI: 10.3892/ijo.9.3.579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We investigated whether dysfunction of p53 and E-cadherin participate in invasiveness and metastasis of human gastric carcinoma. We examined twenty-five human gastric carcinomas for p53, E-cadherin, alpha- and beta-catenin gene alteration by the reverse transcription-polymerase chain reaction-single strand conformation polymorphism (RT-PCR-SSCP) method and sequencing analysis. Three samples (13%) showed p53 gene mutation (two missense mutations and 6 bp deletion). 25% (3/12) of the carcinomas with lymph node metastasis had p53 gene mutations. One sample (4%) showed E-cadherin silent mutation. We were not able to detect alpha- or beta-catenin gene alteration. Therefore we investigated tyrosine-phosphorylation of E-cadherin, a and beta-catenin. Tyrosine-phosphorylated beta-catenin was detected in 13% (2/15) of poorly differentiated carcinomas. These results suggest that the p53 gene mutations have some correlation with lymph node metastasis, and tyrosine phosphorylation of beta-catenin rather than cadherin/catenin gene mutation is at least partly responsible for the loosening of cell-cell contact and invasiveness of poorly differentiated carcinomas.
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Affiliation(s)
- T Mazaki
- NIHON UNIV,SCH MED,DEPT PHARMACOL,ITABASHI KU,TOKYO 173,JAPAN
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48
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Aonuma H, Ogura N, Takahashi K, Fujimoto Y, Iwai S, Hashimoto H, Ito K, Kamino Y, Kondoh T. Characteristics and osteogenic differentiation of stem/progenitor cells in the human dental follicle analyzed by gene expression profiling. Cell Tissue Res 2012; 350:317-31. [PMID: 22890370 DOI: 10.1007/s00441-012-1477-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 06/25/2012] [Indexed: 12/11/2022]
Abstract
The dental follicle is an ectomesenchymal tissue that surrounds developing tooth germ and that contains osteoblastic-lineage-committed stem/progenitor cells. We examined the osteogenic potential of human dental follicle cells (hDFC) by microarray analysis. We first compared the characteristics of hDFC with those of human bone marrow mesenchymal stem cells (hMSC). Like hMSC, hDFC expressed stem cell markers such as STRO-1 and Notch-1 and differentiated not only into the osteoblastic lineage, but also into the adipogenic lineage. We analyzed the gene expression profiles of hDFC and hMSC that were not differentiated toward the osteogenic lineage. The expression of cell markers and growth factor receptors by hDFC and hMSC was similar, whereas the expression pattern of homeobox genes differed between hDFC and hMSC. Next, we investigated gene expression in hDFC during osteogenic differentiation. Gene expression profiles were analyzed in hDFC cultured in osteogenic induction medium (OIM) or in growth medium (GM) for 3 and 10 days. Many genes whose expression was regulated under these conditions were functionally categorized as "transcription" genes. Osteogenic markers were up-regulated in hDFC during osteogenic differentiation, whereas neurogenic markers were down-regulated. The genes whose expression was regulated in hDFC during osteogenic differentiation were further analyzed by ingenuity pathway analysis and real-time polymerase chain reaction. Bone morphogenetic protein and transforming growth factor-β signaling pathways were activated in hDFC cultured in OIM for 3 days. This study indicates that the dental follicle contains stem cells and/or osteoblastic progenitor cells and is a potential cellular resource for bone regeneration therapy.
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Affiliation(s)
- H Aonuma
- Department of Maxillofacial Surgery, Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakaecho-Nishi, Matsudo, Chiba, 271-8587, Japan
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Iwai S, Kiguchi N, Kobayashi Y, Fukazawa Y, Saika F, Ueno K, Yamamoto C, Kishioka S. Inhibition of morphine tolerance is mediated by painful stimuli via central mechanisms. Drug Discov Ther 2012; 6:31-37. [PMID: 22460426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Tolerance to morphine analgesia following repeated administration disturbs the continuation of opioid therapy for severe pain. Emerging evidence suggests that the development of morphine tolerance may be antagonized by painful stimuli. To clarify the detailed mechanisms of these phenomena, we examined the effects of several pain stimuli on morphine-induced tolerance. Subcutaneous (s.c.) injection of morphine (10 mg/kg) produced an analgesic effect, which was evaluated by tail-pinch test. Morphine-induced analgesia was diminished by repeated administration of morphine (10 mg/kg, s.c.) once a day for 5 days, demonstrating the development of tolerance. Morphine analgesic tolerance was suppressed by nerve injury-induced neuropathic pain and formalin- or carrageenan-induced inflammatory pain. Tolerance to serum corticosterone elevation by morphine (10 mg/kg), which was evaluated by fluorometric assay, was also suppressed by formalin-induced inflammatory pain. Moreover, morphine analgesia induced by intracerebroventricular (10 nmol) or intrathecal (5 nmol) injection was diminished by repeated administration of morphine s.c., and this was also suppressed by carrageenan-induced inflammatory pain. These results suggest that morphine tolerance is inhibited by several pain stimuli, including neuropathic and inflammatory pain, through central mechanisms.
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Affiliation(s)
- S Iwai
- Department of Pharmacology, Wakayama Medical University, Wakayama, Japan
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50
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Ihara K, Nitta J, Sato A, Iwai S, Asano M, Kanoh M, Muramatsu K, Yamato T, Matsumura Y, Takei K, Asakawa K, Hirao K, Isobe M. Coexistence of Left-Sided Atrioventricular Accessory Pathways With a Common Inferior Pulmonary Vein Ostium. Circ Arrhythm Electrophysiol 2011; 4:310-7. [DOI: 10.1161/circep.110.960815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
As the technique for radiofrequency catheter ablation for atrial fibrillation (AF) has progressed, so has our knowledge of both normal and abnormal anatomy of the left atrium and pulmonary veins (PV). We treated several AF patients with accessory conduction pathways (ACP) who were also found to have a common ostium of inferior PVs (CIPV), a relatively rare PV anomaly. No relation between ACP and PV anomalies has ever been reported, and the aim of our study was to study this association.
Methods and Results—
This study included 137 consecutive patients (104 men; mean age, 60±9 years) who underwent AF ablation for paroxysmal and persistent AF at our institution from March 2009 to August 2010. We analyzed coexisting supraventricular tachycardias and left atrium and PV morphology by multidetector row CT. Thirty-eight of 137 patients (27.7%) were found to have some PV anomaly, consisting of 13 with a common trunk of left PV, 19 with right additional PV, 3 with a common trunk of right PV, and 3 with CIPV. Thirty-one patients (22.6%) had supraventricular tachycardias. They were 26 cases of atrial flutter, 4 of Wolff-Parkinson-White syndrome, and 3 of atrioventricular nodal reentrant tachycardia. The prevalence of a coexisting ACP was significantly higher in patients with CIPV than in those without CIPV (3 of 3 [100%] versus 1 in 134 [0.7%];
P
<0.0001). All ACPs with CIPV were located in the left side. The other supraventricular tachycardias were not associated with any PV anomalies.
Conclusions—
There is a possible association between CIPV and left-sided ACP in AF patients. This suggests that there is a likelihood of developmental association between them.
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Affiliation(s)
- Kensuke Ihara
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Junichi Nitta
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Akira Sato
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Shinsuke Iwai
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Mitsutoshi Asano
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Miki Kanoh
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Kenichi Muramatsu
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Tsunehiro Yamato
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Yutaka Matsumura
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Kazuyasu Takei
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Kihiro Asakawa
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Kenzo Hirao
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
| | - Mitsuaki Isobe
- From the Department of Cardiology, Saitama Red Cross Hospital, Saitama-City, Saitama, Japan (K.I., J.N., A.S., S.I., M.A., M.K., K.M., T.Y., Y.M., K.T., K.A.); and the Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan (K.I., K.H., M.I.)
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