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Nagoshi R, Kijima Y, Kozuki A, Fujiwara R, Shibata H, Suzuki A, Soga F, Asada H, Higuchi K, Shite J. Success rate and influencing factors of a balloon-push technique: A new technique to remove side branch-jailed struts under three-dimensional optical coherence tomography guidance. Catheter Cardiovasc Interv 2023; 101:528-535. [PMID: 36617385 DOI: 10.1002/ccd.30548] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 10/21/2022] [Accepted: 12/26/2022] [Indexed: 01/09/2023]
Abstract
BACKGROUND Kissing balloon inflation with distal guide wire recross can cause severe stent deformation depending on the stent link location with respect to the carina. The balloon-push technique, by which an inflated balloon is forced into the SB from the proximal main vessel (MV), is a feasible way to remove jailed struts without causing severe stent deformation. AIMS We investigated the procedural success rate, patterns of jailed strut removal at side branch (SB) orifices, factors related to failure of jailed strut removal, and follow-up angiogram results of the balloon-push technique. METHODS Between September 2015 and December 2020, 51 bifurcation stenting cases in which the balloon-push technique was used were enrolled. Based on three-dimensional optical coherence tomography images, strut removal with 1 stent crown length was defined as successful. Strut removal patterns were classified into two types: parallel-slide type (stent struts shifted distally into the MV lumen without inversion) and under-carina type (stent struts shifted distally under the carina with strut inversion or strut slide). RESULTS Procedural success was attained in 39 cases (success rate: 76.5%). Parallel-slide type and under-carina type occurred in 43% and 33% of cases, respectively. Factors related to failure were trifurcation lesions and a smaller pushed balloon-SB artery ratio compared with those in success cases (0.95 ± 0.18 vs. 1.10 ± 0.22, p = 0.032). Follow-up angiography was performed in 37 cases, and 2 cases had binary in-stent restenosis. CONCLUSIONS Removal of jailed struts with the balloon-push technique was feasible, without severe stent deformation, in bifurcation stentings.
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Affiliation(s)
- Ryoji Nagoshi
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Yoichi Kijima
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Amane Kozuki
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Ryudo Fujiwara
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Hiroyuki Shibata
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Atsushi Suzuki
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Fumitaka Soga
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Hiroyuki Asada
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Kotaro Higuchi
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Junya Shite
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
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Kozuki A, Takahara M, Shimizu M, Kijima Y, Nagoshi R, Fujiwara R, Shibata H, Suzuki A, Soga F, Miyata T, Sakamoto Y, Seo H, Asada H, Isawa K, Higuchi K, Shite J. Outcomes of Dissection Angles as Predictor of Restenosis after Drug-Coated Balloon Treatment. J Atheroscler Thromb 2021; 28:954-962. [PMID: 33100279 PMCID: PMC8532059 DOI: 10.5551/jat.59774] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
AIM The predictors of restenosis after endovascular therapy (EVT) with paclitaxel drug-coated balloons (DCBs) have not been clearly established. The present study aimed to investigate the association of post-procedural dissection, as evaluated using intravascular ultrasound (IVUS), with the risk of restenosis following femoropopliteal EVT with paclitaxel DCBs. METHODS In the present single-center retrospective study, 60 de novo femoropopliteal lesions (44 patients) that underwent EVT with DCBs, without bail-out stenting, were enrolled. The primary outcome was 1-year primary patency. Risk factors for restenosis were evaluated using a Cox proportional hazards regression model and random survival forest analysis. RESULTS The 1-year primary patency rate was 57.2% [95% confidence interval, 45%-72%]. IVUS-evaluated post-procedural dissection was significantly associated with the risk of restenosis (P=0.002), with the best cutoff point of 64º [range, 39º-83º]. The random survival forest analysis showed that the variable importance measure of IVUS-evaluated dissection was significantly lower than that of the reference vessel diameter (P<0.001), not different from that of the lesion length (P=0.41), and significantly higher than that of any other clinical feature (all P<0.05). CONCLUSION IVUS-evaluated post-procedural dissection was associated with 1-year restenosis following femoropopliteal EVT with DCB.
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Affiliation(s)
- Amane Kozuki
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Mitsuyoshi Takahara
- Department of Diabetes Care Medicine, Osaka University Graduate School of Medicine
| | | | - Yoichi Kijima
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Ryoji Nagoshi
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Ryudo Fujiwara
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | | | - Atsushi Suzuki
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Fumitaka Soga
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | | | - Yuki Sakamoto
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Hidenobu Seo
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Hiroyuki Asada
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Kouhei Isawa
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Kotaro Higuchi
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
| | - Junya Shite
- Osaka Saiseikai Nakatsu Hospital, Division of Cardiology
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Asada H, Suzuki A, Fujiwara R, Song WH, Iwasa K, Kotaro H, Seo H, Sakamoto Y, Shimizu M, Miyata T, Soga F, Shibata H, Kozuki A, Nagoshi R, Kijima Y, Shite J. B-PO02-093 LOCALIZED ABNORMAL ATRIAL ELECTROGRAMS WAS ASSOCIATED WITH POST-ABLATION RECURRENCE IN PATIENTS WITH LONG-STANDING PERSISTENT ATRIAL FIBRILLATION AND SEVERELY ENLARGED, PRESERVED MYOCARDIAL-VOLTAGE ATRIA. Heart Rhythm 2021. [DOI: 10.1016/j.hrthm.2021.06.347] [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: 10/20/2022]
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Suzuki A, Fujiwara R, Asada H, Iwasa K, Miyata T, Song WH, Higuchi K, Seo H, Sakamoto Y, Shimizu M, Soga F, Shibata H, Kozuki A, Nagoshi R, Lehmann HI, Kijima Y, Shite J. Peri-Balloon Leak Flow Velocity Assessed by Intra-Cardiac Echography Predicts Pulmonary Vein Electrical Gap - Intra-Cardiac Echography-Guided Contrast-Free Cryoballoon Ablation. Circ J 2021; 86:256-265. [PMID: 34334554 DOI: 10.1253/circj.cj-21-0423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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] [Indexed: 11/09/2022]
Abstract
BACKGROUND The use of iodine contrast agents is one possible limitation in cryoballoon ablation (CBA) for atrial fibrillation (AF). This study investigated intracardiac echography (ICE)-guided contrast-free CBA.Methods and Results:The study was divided into 2 phases. First, 25 paroxysmal AF patients (Group 1) underwent CBA, and peri-balloon leak flow velocity (PLFV) was assessed using ICE and electrical pulmonary vein (PV) lesion gaps were assessed by high-density electroanatomical mapping. Then, 24 patients (Group 2) underwent ICE-guided CBA and were compared with 25 patients who underwent conventional CBA (historical controls). In Group 1, there was a significant correlation between PLFV and electrical PV gap diameter (r=-0.715, P<0.001). PLFV was higher without than with an electrical gap (mean [±SD] 127.0±28.6 vs. 66.6±21.0 cm/s; P<0.001) and the cut-off value of PLFV to predict electrical isolation was 105.7 cm/s (sensitivity 0.700, specificity 0.929). In Group 2, ICE-guided CBA was successfully performed with acute electrical isolation of all PVs and without the need for "rescue" contrast injection. Atrial tachyarrhythmia recurrence at 6 months did not differ between ICE-guided and conventional CBA (3/24 [12.5%] vs. 5/25 [20.0%], respectively; P=0.973, log-rank test). CONCLUSIONS PLFV predicted the presence of an electrical PV gap after CBA. ICE-guided CBA was feasible and safe, and could potentially be performed completely contrast-free without a decrease in ablation efficacy.
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Affiliation(s)
- Atsushi Suzuki
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Ryudo Fujiwara
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Hiroyuki Asada
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Kohei Iwasa
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | | | - Woo Hyung Song
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Kotaro Higuchi
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Hidenobu Seo
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Yuki Sakamoto
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | | | - Fumitaka Soga
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | | | - Amane Kozuki
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Ryoji Nagoshi
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - H Immo Lehmann
- Department of Cardiology, Massachusetts General Hospital, Corrigan Minehan Heart Center.,Harvard Medical School
| | - Yoichi Kijima
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Junya Shite
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
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Nakamura T, Takami M, Fukuzawa K, Kiuchi K, Kono H, Kobori A, Sakamoto Y, Watanabe R, Okumura Y, Yamashita S, Yamashiro K, Miyamoto K, Kusano K, Kanda T, Masuda M, Yoshitani K, Yoshida A, Hirayama Y, Adachi K, Mine T, Shimane A, Takeda M, Takei A, Okajima K, Fujiwara R, Hirata KI. Incidence and Characteristics of Coronary Artery Spasms Related to Atrial Fibrillation Ablation Procedures - Large-Scale Multicenter Analysis. Circ J 2021; 85:264-271. [PMID: 33431721 DOI: 10.1253/circj.cj-20-1096] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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] [Indexed: 11/09/2022]
Abstract
BACKGROUND Coronary artery spasms (CASs), which can cause angina attacks and sudden death, have been recently reported during catheter ablation. The aim of the present study was to report the incidence, characteristics, and prognosis of CASs related to atrial fibrillation (AF) ablation procedures.Methods and Results:The AF ablation records of 22,232 patients treated in 15 Japanese hospitals were reviewed. CASs associated with AF ablation occurred in 42 of 22,232 patients (0.19%). CASs occurred during ablation energy applications in 21 patients (50%). CASs also occurred before ablation in 9 patients (21%) and after ablation in 12 patients (29%). The initial change in the electrocardiogram was ST-segment elevation in the inferior leads in 33 patients (79%). Emergency coronary angiography revealed coronary artery stenosis and occlusions, which were relieved by nitrate administration. No air bubbles were observed. A comparison of the incidence of CASs during pulmonary vein isolation between the different ablation energy sources revealed a significantly higher incidence with cryoballoon ablation (11/3,288; 0.34%) than with radiofrequency catheter, hot balloon, or laser balloon ablation (8/18,596 [0.04%], 0/237 [0%], and 0/111 [0%], respectively; P<0.001). CASs most often occurred during ablation of the left superior pulmonary vein. All patients recovered without sequelae. CONCLUSIONS CASs related to AF ablation are rare, but should be considered as a dangerous complication that can occur anytime during the periprocedural period.
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Affiliation(s)
- Toshihiro Nakamura
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Mitsuru Takami
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Koji Fukuzawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Kunihiko Kiuchi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Hiroyuki Kono
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Atsushi Kobori
- Department of Cardiology, Kobe City Medical Center General Hospital
| | | | - Ryuta Watanabe
- Division of Cardiology, Department of Medicine, Nihon University of Medicine
| | - Yasuo Okumura
- Division of Cardiology, Department of Medicine, Nihon University of Medicine
| | | | | | - Koji Miyamoto
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Kengo Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | | | | | - Kazuyasu Yoshitani
- Department of Cardiology, Hyogo Prefectural Amagasaki General Medical Center
| | | | | | | | - Takanao Mine
- Department of Cardiovascular and Renal Medicine, Hyogo College of Medicine
| | - Akira Shimane
- Department of Cardiology, Himeji Cardiovascular Center
| | | | - Asumi Takei
- Department of Cardiology, Kobe Rosai Hospital
| | | | - Ryudo Fujiwara
- Cardiovascular Division, Osaka Saiseikai Nakatsu Hospital
| | - Ken-Ichi Hirata
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
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Yukimune M, Fujiwara R, Mita T, Ishikawa F. Polytypism in GaAs/GaNAs core-shell nanowires. Nanotechnology 2020; 31:505608. [PMID: 32937605 DOI: 10.1088/1361-6528/abb904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report the crystal structures of GaAs and GaAs/GaNAs/GaAs core-multishell nanowires (NWs). From statistical investigations by x-ray diffraction (XRD) and electron backscattered diffraction (EBSD) pattern analysis, we statistically and microscopically resolve the zinc-blende (ZB) and wurtzite (WZ) polytypism within the NWs. The XRD analysis shows a smaller fraction of WZ segments in the NWs with a larger concentration of nitrogen. With increasing nitrogen content in the GaNAs shell, the ZB peak position shifts toward higher angles and the WZ peak intensity decreases. The EBSD measurements also confirm the coexistence of ZB and WZ polytypes in all of the NWs. Their polytype switches along the length. Twin defects are observed in the ZB segments in all of the NWs. The unique grain map and grain size distribution show a decrease of the WZ segments in the GaAs/GaNAs/GaAs NW, in agreement with the XRD results. Microscopically, the local area where the polytype switches from WZ in the inner-core side to ZB toward the outer-shell surface is observed. Overall, we propose that the WZ polytype in the GaAs NWs decreases because of the strain induced by the growth of the GaNAs shell with a smaller lattice constant.
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Affiliation(s)
- M Yukimune
- Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
| | - R Fujiwara
- Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
| | - T Mita
- Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
| | - F Ishikawa
- Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
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7
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Stehr JE, Balagula RM, Jansson M, Yukimune M, Fujiwara R, Ishikawa F, Chen WM, Buyanova IA. Effects of growth temperature and thermal annealing on optical quality of GaNAs nanowires emitting in the near-infrared spectral range. Nanotechnology 2020; 31:065702. [PMID: 31658456 DOI: 10.1088/1361-6528/ab51cd] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report on optimization of growth conditions of GaAs/GaNAs/GaAs core/shell/shell nanowire (NW) structures emitting at ∼1 μm, aiming to increase their light emitting efficiency. A slight change in growth temperature is found to critically affect optical quality of the active GaNAs shell and is shown to result from suppressed formation of non-radiative recombination (NRR) centers under the optimum growth temperature. By employing the optically detected magnetic resonance spectroscopy, we identify gallium vacancies and gallium interstitials as being among the dominant NRR defects. The radiative efficiency of the NWs can be further improved by post-growth annealing at 680 °C, which removes the gallium interstitials.
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Affiliation(s)
- J E Stehr
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
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Shibata H, Kijima Y, Nagoshi R, Kozuki A, Fujiwara R, Suzuki A, Kakizaki S, Fujimoto D, Kyo S, Masuko E, Miyata T, Shite J. 105Calcified nodule in coronary artery: clinical features and prognosis with optical coherence tomography-guided percutaneous coronary intervention. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/13/2022] Open
Abstract
Abstract
Background
Calcified nodule (CN) in coronary artery is known to be a significant factor for stent underexpansion, however, its baseline characteristics and long-term prognosis is unclear.
Method
421 consecutive severe calcified lesions (Defined as maximum calcium arc >180 degrees) which underwent optical coherence tomography (OCT)-guided percutaneous coronary intervention (PCI) were analyzed between January 2013 and December 2017. We investigated baseline characteristics and OCT parameter (maximum arc of calcium, maximum thickness of calcium, and length of calcium) and long-term clinical outcome (Major adverse cardiac event (MACE), any cause of death, acute myocardial infarction (AMI) and target vessel failure (TVF)). Median follow up period was 33.7 months.
Result
CN was seen in 22.3% (94 lesions) of all severe calcified lesions. Baseline characteristics and OCT parameters were significantly different in CN and non-CN groups (Hemodialysis; 23.6% vs. 14.1%, p=0.03, Multivessel Disease; 57.4% vs. 44.6, p=0.03, maximum arc of calcium; 305.4 vs. 286.1, p=0.02, maximum thickness of calcium (μm); 1206.2 vs 1123.8, p=0.01, length of calcium (mm); 24.6 vs. 19.0, p=0.01). CN lesions was strongly associated poor long-term clinical outcome (MACE; 50.5% vs. 25.7%, p<0.01), any cause of death; 18.1% vs. 9.5%, p=0.02, AMI; 7.4% vs. 2.4%, p=0.02, TVF; 38.3% vs. 19.2%, p<0.01).
Conclusion
Hemodialysis, multivessel disease and abundant calcium component may have accompanied with CN which may result in poor long-term prognosis.
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Affiliation(s)
- H Shibata
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - Y Kijima
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - R Nagoshi
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - A Kozuki
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - R Fujiwara
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - A Suzuki
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - S Kakizaki
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - D Fujimoto
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - S Kyo
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - E Masuko
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - T Miyata
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
| | - J Shite
- Osaka Saiseikai Nakatsu Hospital, Department of Cardiology, Osaka, Japan
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Shibata H, Kijima Y, Nagoshi R, Kozuki A, Fujiwara R, Suzuki A, Kakizaki S, Fujimoto D, Kyo S, Masuko E, Miyata T, Shite J. P3577Predictors analysis of restenosis in calcified nodule with OCT-guided PCI. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/12/2022] Open
Abstract
Abstract
Background
Recent reports show that stenting for coronary calcified nodule (CN) resulted in frequent in-stent restenosis, however, its predictors are unclear.
Method
117 consecutive calcified nodule lesions which underwent optical coherence tomography (OCT)-guided PCI were analyzed between January 2013 and March 2018. We investigated baseline characteristics and OCT parameter in CN site (Arc of CN, Lumen area and Symmetry index before and after PCI).
Result
CN site in-stent restenosis was seen 35 lesions (29.9%). Baseline characteristics was significantly different between restenosis group and non-restenosis group (Age; 68.9y.o vs. 73.3y.o, p=0.01, diabetes mellitus; 80.0% vs. 57.3%, Chronic Kidney Disease (CKD); 74.3% vs. 36.6%, Hemodialysis; 54.3% vs. 12.2%). Arc of CN before PCI in restenosis group was larger than that in non-restenosis group (122.7 vs. 110.0 degrees, p=0.01). Post stent symmetry index in restenosis group was smaller than that in non-restenosis group (0.64 vs. 0.75, p<0.01).
Conclusion
Younger patients, diabetes mellitus, CKD, hemodialysis, arc of CN before PCI, post stent symmetry index may be predictors of CN site restenosis.
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Affiliation(s)
- H Shibata
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Y Kijima
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - R Nagoshi
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - A Kozuki
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - R Fujiwara
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - A Suzuki
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - S Kakizaki
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - D Fujimoto
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - S Kyo
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - E Masuko
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - T Miyata
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - J Shite
- Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
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10
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Takenawa T, Harada K, Fujiwara R, Hisano T, Mishima K. MON-PO406: Possibility of Direct Effect of Elemental Diet Elental® on Chemotherapy-Induced Oral Mucositis and Dermatitis. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32239-3] [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: 10/26/2022]
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Yukimune M, Fujiwara R, Mita T, Tsuda N, Natsui J, Shimizu Y, Jansson M, Balagula R, Chen WM, Buyanova IA, Ishikawa F. Molecular beam epitaxial growth of dilute nitride GaNAs and GaInNAs nanowires. Nanotechnology 2019; 30:244002. [PMID: 30794991 DOI: 10.1088/1361-6528/ab0974] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We report the growth of dilute nitride GaNAs and GaInNAs core-multishell nanowires (NWs) using molecular beam epitaxy assisted by a plasma source. Using the self-catalyst vapor-liquid-solid growth mode, these NWs were grown on Si(111) and silicon on insulator substrates. The GaNAs and GaInNAs shells contain nitrogen up to 3%. Axial cross-sectional scanning transmission electron microscopy measurements and energy-dispersive x-ray spectrometry confirm the formation of the core-multishell NW structure. We obtained high-quality GaNAs NWs with nitrogen compositions up to 2%. On the other hand, GaNAs containing 3% nitrogen, and GaInNAs NWs, show distorted structures; moreover, the optical emissions seem to be related to defects. Further optimisations of the growth conditions will improve these properties, promising future applications in nanoscale optoelectronics.
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Affiliation(s)
- M Yukimune
- Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
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12
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Fujiwara R, Takami M, Kijima Y, Nagoshi R, Kozuki A, Shite J. Precise mechanism of bradycardia after left atrial surgery using a superior transseptal approach. HeartRhythm Case Rep 2019; 5:241-243. [PMID: 31193200 PMCID: PMC6520906 DOI: 10.1016/j.hrcr.2019.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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] [Received: 12/17/2018] [Revised: 01/11/2019] [Accepted: 01/14/2019] [Indexed: 11/30/2022] Open
Affiliation(s)
- Ryudo Fujiwara
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Mitsuru Takami
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Yoichi Kijima
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Ryoji Nagoshi
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Amane Kozuki
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Junya Shite
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
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Mochizuki Y, Yamasaki M, Fujiwara R, Nakagiri K, Iwahashi K, Shite J. Severe Aortic Regurgitation Caused by Congenital Quadricuspid Aortic Valve With an Anomalous Cord. Can J Cardiol 2018; 34:1089.e5-1089.e6. [PMID: 29887219 DOI: 10.1016/j.cjca.2018.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 03/05/2018] [Accepted: 03/08/2018] [Indexed: 11/24/2022] Open
Affiliation(s)
| | - Masayuki Yamasaki
- Ultrasound Examination Center, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Ryudo Fujiwara
- Division of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Keitaro Nakagiri
- Division of Cardiovascular Surgery, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Kazuhiko Iwahashi
- Division of Cardiovascular Surgery, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Junya Shite
- Division of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
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Shibata H, Kijima Y, Nagoshi R, Takami M, Kozuki A, Fujiwara R, Mochizuki Y, Nakano S, Fukuyama Y, Kakizaki S, Fujimoto D, Kurimoto H, Masuko E, Shite J. 5712Clinical outcome of very severe calcified lesions guided by optical coherence tomography. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5712] [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: 11/14/2022] Open
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15
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Shibata H, Kijima Y, Nagoshi R, Takami M, Kozuki A, Fujiwara R, Mochizuki Y, Nakano S, Fukuyama Y, Kakizaki S, Fujimoto D, Kurimoto H, Masuko E, Shite J. 5708Incidence and predictors of target lesion revascularization in lesions with moderate to severe calcification which underwent percutaneous coronary intervention guided by optical coherence tomography. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5708] [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: 11/15/2022] Open
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16
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Fujiwara R, Takami M, Kijima Y, Masano T, Nagoshi R, Kozuki A, Shibata H, Nakano S, Fukuyama Y, Kakizaki S, Fujimoto D, Shite J. A case of an ablation catheter entrapped in the pulmonary vein during atrial fibrillation ablation requiring open heart surgery for removal. HeartRhythm Case Rep 2017; 3:87-89. [PMID: 28491775 PMCID: PMC5420032 DOI: 10.1016/j.hrcr.2016.09.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 11/23/2022] Open
Affiliation(s)
- Ryudo Fujiwara
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Mitsuru Takami
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Yoichi Kijima
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Tomoya Masano
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Ryoji Nagoshi
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Amane Kozuki
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Hiroyuki Shibata
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Shinsuke Nakano
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Yusuke Fukuyama
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | | | - Daichi Fujimoto
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Junya Shite
- Department of Cardiology, Saiseikai Nakatsu Hospital, Osaka, Japan
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Kim SJ, Park JY, Shibata T, Fujiwara R, Kang HY. Efficacy and possible mechanisms of topical tranexamic acid in melasma. Clin Exp Dermatol 2016; 41:480-5. [DOI: 10.1111/ced.12835] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2015] [Indexed: 11/28/2022]
Affiliation(s)
- S. J. Kim
- Department of Dermatology; Ajou University School of Medicine; Suwon Korea
| | - J.-Y. Park
- Department of Dermatology; Ajou University School of Medicine; Suwon Korea
| | - T. Shibata
- Shiseido Research Center; Yokohama Japan
| | | | - H. Y. Kang
- Department of Dermatology; Ajou University School of Medicine; Suwon Korea
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18
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Kozuki A, Shinke T, Otake H, Kijima Y, Masano T, Nagoshi R, Imamura K, Fujiwara R, Shibata H, Takeshige R, Tsukiyama Y, Yanaka K, Nakano S, Fukuyama Y, Kawashima S, Hirata KI, Shite J. Optical coherence tomography study of chronic-phase vessel healing after implantation of bare metal and paclitaxel-eluting self-expanding nitinol stents in the superficial femoral artery. J Cardiol 2016; 67:424-9. [DOI: 10.1016/j.jjcc.2015.06.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/04/2015] [Accepted: 06/10/2015] [Indexed: 11/25/2022]
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Suzuki A, Fukuzawa K, Yamashita T, Yoshida A, Sasaki N, Emoto T, Takei A, Fujiwara R, Nakanishi T, Yamashita S, Matsumoto A, Konishi H, Ichibori H, Hirata KI. Circulating intermediate CD14++CD16+monocytes are increased in patients with atrial fibrillation and reflect the functional remodelling of the left atrium. Europace 2016; 19:40-47. [PMID: 26826137 DOI: 10.1093/europace/euv422] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 08/13/2015] [Accepted: 11/18/2015] [Indexed: 11/15/2022] Open
Abstract
AIMS A recent large clinical study demonstrated the association between intermediate CD14++CD16+monocytes and cardiovascular events. However, whether that monocyte subset contributes to the pathogenesis of atrial fibrillation (AF) has not been clarified. We compared the circulating monocyte subsets in AF patients and healthy people, and investigated the possible role of intermediate CD14++CD16+monocytes in the pathophysiology of AF. METHODS AND RESULTS This case-control study included 44 consecutive AF patients without systemic diseases referred for catheter ablation at our hospital, and 40 healthy controls. Patients with systemic diseases, including structural heart disease, hepatic or renal dysfunction, collagen disease, malignancy, and inflammation were excluded. Monocyte subset analyses were performed (three distinct human monocyte subsets: classical CD14++CD16-, intermediate CD14++CD16+, and non-classical CD14+CD16++monocytes). We compared the monocyte subsets and evaluated the correlation with other clinical findings. A total of 60 participants (30 AF patients and 30 controls as an age-matched group) were included after excluding 14 AF patients due to inflammation. Atrial fibrillation patients had a higher proportion of circulating intermediate CD14++CD16+monocytes than the controls (17.0 ± 9.6 vs. 7.5 ± 4.1%, P < 0.001). A multivariable logistic regression analysis demonstrated that only the proportion of intermediate CD14++CD16+monocytes (odds ratio: 1.316; 95% confidence interval: 1.095-1.582, P = 0.003) was independently associated with the presence of AF. Intermediate CD14++CD16+monocytes were negatively correlated with the left atrial appendage flow during sinus rhythm (r= -0.679, P = 0.003) and positively with the brain natriuretic peptide (r = 0.439, P = 0.015). CONCLUSION Intermediate CD14++CD16+monocytes might be closely related to the pathogenesis of AF and reflect functional remodelling of the left atrium.
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Affiliation(s)
- Atsushi Suzuki
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Koji Fukuzawa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan .,Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomoya Yamashita
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Akihiro Yoshida
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Naoto Sasaki
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takuo Emoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Asumi Takei
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ryudo Fujiwara
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomoyuki Nakanishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Soichiro Yamashita
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Akinori Matsumoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroki Konishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hirotoshi Ichibori
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ken-Ichi Hirata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.,Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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20
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Chambers JK, Yoshino Y, Fujiwara R, Nishimura R, Nakayama H, Uchida K. Thymic Carcinoma with Cartilage Formation in a Dog. J Comp Pathol 2016; 154:38-41. [PMID: 26781228 DOI: 10.1016/j.jcpa.2015.11.001] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 10/26/2015] [Accepted: 11/02/2015] [Indexed: 11/17/2022]
Abstract
An 11-year-old female Chihuahua exhibited respiratory distress and a computed tomography scan showed a large mass in the anterior thoracic cavity. During surgery, it was found that the mass was strongly adherent to surrounding tissue. A histopathological examination of a biopsy sample from the mass revealed proliferation of atypical epithelial cells and cartilage formation admixed with mature lymphocytes. Immunohistochemically, the tumour cells, as well as the normal canine thymic epithelial cells, were positive for pan-cytokeratin (CK), CK5/6, CK19, p63 and bone morphogenetic protein (BMP) 6. Foci of cartilage tissue were formed in association with the neoplastic epithelial tissue. In the normal canine thymus, the subcapsular epithelial cells are positive for both CK19 and BMP6. These findings indicate that the cartilage element within the tumour developed from CK19-positive neoplastic epithelial cells, which were derived from the thymic subcapsular epithelium. This case represents a novel variant of canine thymic epithelial tumour that exhibits cartilage differentiation.
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Affiliation(s)
- J K Chambers
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, Japan
| | - Y Yoshino
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, Japan
| | - R Fujiwara
- Veterinary Medical Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, Japan
| | - R Nishimura
- Department of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, Japan
| | - H Nakayama
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, Japan
| | - K Uchida
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, Japan.
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21
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Fujiwara R, Imamura K, Kijima Y, Masano T, Nagoshi R, Kohzuki A, Shibata H, Tsukiyama Y, Takeshige R, Yanaka K, Nakano S, Fukuyama Y, Shite J. The importance of catheter stability evaluated by Visitag(TM) during pulmonary vein isolation. J Interv Card Electrophysiol 2016; 46:161-6. [PMID: 26781786 DOI: 10.1007/s10840-016-0103-z] [Citation(s) in RCA: 8] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 01/11/2016] [Indexed: 10/22/2022]
Abstract
BACKGROUND The recurrence rates of atrial fibrillation (Af) after ablation are still high, and repeat procedures are required in these patients. The main reason for Af recurrence is the recovery of the conduction between the pulmonary veins and left atrium. The importance of catheter stability during the pulmonary vein isolation (PVI) is not well studied. PURPOSE The purpose of this study was to evaluate the contact force (CF), stable ablation time, and power during conduction blocking lesion formation for PVI. METHODS Thirty-two consecutive drug-refractory Af patients who underwent an initial PVI using CARTO 3 and Visitag were included. The CF, ablation time, force time integral (FTI), and ablation power were recorded by Visitag. Residual conduction gap points requiring touch-up ablation after an encircling linear ablation (R point), spontaneous reconnection points (S point), and dormant conduction points (D point) were considered as non-conduction blocking lesion points. Each ablation parameter for the non-conduction blocking lesion points was compared with the other lesion points. RESULTS Twenty-one points in 16 patients were considered non-conduction blocking lesions. Ten were R, eight were S, and three were D points. The CF, ablation time, FTI, and power at the non-conduction blocking lesion points and other points were 12.0 g (7.0-21.5) and 12.0 g (9.0-16.0) (P = 0.9), 7.7 s (5.6-10.1) and 12.5 s (9.4-16.8) (P < 0.05), 103.0 g*s (62.0-174.5) and 149.0 g*s (104.0-213.0) (P < 0.05), and 30.0 W (22.5-30.0) and 30.0 W (30.0-30.0) (P = 0.06), respectively. CONCLUSIONS Shorter ablation time recorded in Visitag lead to non-conduction blocking lesion.
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Affiliation(s)
- Ryudo Fujiwara
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan.
| | - Kimitake Imamura
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Yoichi Kijima
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Tomoya Masano
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Ryoji Nagoshi
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Amane Kohzuki
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Hiroyuki Shibata
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Yoshiro Tsukiyama
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Ryo Takeshige
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Kenichi Yanaka
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Shinsuke Nakano
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Yusuke Fukuyama
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
| | - Junya Shite
- Department of Cardiology, Saiseikai Nakatsu Hospital, Shibata 2-10-39, Kita-ku, Osaka-shi, Osaka, 530-0012, Japan
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Kiuchi K, Okajima K, Shimane A, Kanda G, Yokoi K, Teranishi J, Aoki K, Chimura M, Toba T, Oishi S, Sawada T, Tsukishiro Y, Onishi T, Kobayashi S, Taniguchi Y, Yamada S, Yasaka Y, Kawai H, Yoshida A, Fukuzawa K, Itoh M, Imamura K, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S, Hirata KI, Tada H, Yamasaki H, Naruse Y, Igarashi M, Aonuma K. Impact of esophageal temperature monitoring guided atrial fibrillation ablation on preventing asymptomatic excessive transmural injury. J Arrhythm 2015; 32:36-41. [PMID: 26949429 PMCID: PMC4759118 DOI: 10.1016/j.joa.2015.07.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 07/21/2015] [Accepted: 07/24/2015] [Indexed: 11/20/2022] Open
Abstract
Background Even with the use of a reduced energy setting (20–25 W), excessive transmural injury (ETI) following catheter ablation of atrial fibrillation (AF) is reported to develop in 10% of patients. However, the incidence of ETI depends on the pulmonary vein isolation (PVI) method and its esophageal temperature monitor setting. Data comparing the incidence of ETI following AF ablation with and without esophageal temperature monitoring (ETM) are still lacking. Methods This study was comprised of 160 patients with AF (54% paroxysmal, mean: 24.0±2.9 kg/m2). Eighty patients underwent ablation accompanied by ETM. The primary endpoint was defined as the occurrence of ETI assessed by endoscopy within 5 d after the AF ablation. The secondary endpoint was defined as AF recurrence after a single procedure. If the esophageal temperature probe registered >39 °C, the radiofrequency (RF) application was stopped immediately. RF applications could be performed in a point-by-point manner for a maximum of 20 s and 20 W. ETI was defined as any injury that resulted from AF ablation, including esophageal injury or periesophageal nerve injury (peri-ENI). Results The incidence of esophageal injury was significantly lower in patients whose AF ablation included ETM compared with patients without ETM (0 [0%] vs. 6 [7.5%], p=0.028), but not the incidence of peri-ENI (2 [2.5%] vs. 3 [3.8%], p=1.0). AF recurrence 12 months after the procedure was similar between the groups (20 [25%] in the ETM group vs. 19 [24%] in the non-ETM group, p=1.00). Conclusions Catheter ablation using ETM may reduce the incidence of esophageal injury without increasing the incidence of AF recurrence but not the incidence of peri-ENI.
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Affiliation(s)
- Kunihiko Kiuchi
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Katsunori Okajima
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Akira Shimane
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Gaku Kanda
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Kiminobu Yokoi
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Jin Teranishi
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Kousuke Aoki
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Misato Chimura
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Takayoshi Toba
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Shogo Oishi
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Takahiro Sawada
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Yasue Tsukishiro
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Tetsuari Onishi
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Seiichi Kobayashi
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Yasuyo Taniguchi
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Shinichiro Yamada
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Yoshinori Yasaka
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Hiroya Kawai
- Department of Cardiology, Himeji Cardiovascular Center, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Akihiro Yoshida
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Koji Fukuzawa
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Mitsuaki Itoh
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Kimitake Imamura
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Ryudo Fujiwara
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Atsushi Suzuki
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Tomoyuki Nakanishi
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Soichiro Yamashita
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Ken-Ichi Hirata
- Division of Cardiovascular Medicine, Kobe University School of Medicine, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Hiroshi Tada
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Hiro Yamasaki
- Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Yoshihisa Naruse
- Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Miyako Igarashi
- Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba, Saishyo Kou 520, Himeji, Hyogo, Japan
| | - Kazutaka Aonuma
- Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba, Saishyo Kou 520, Himeji, Hyogo, Japan
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Costal-Oliveira F, Guerra-Duarte C, Castro KLP, Tintaya B, Bonilla C, Silva W, Yarlequé A, Fujiwara R, Melo MM, Chávez-Olórtegui C. Serological, biochemical and enzymatic alterations in rodents after experimental envenomation with Hadruroides lunatus scorpion venom. Toxicon 2015; 103:129-34. [PMID: 26140842 DOI: 10.1016/j.toxicon.2015.06.022] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 06/22/2015] [Accepted: 06/25/2015] [Indexed: 01/17/2023]
Abstract
Toxic effects of Peruvian Hadruroides lunatus scorpion venom on different biochemical and enzymatic parameters in blood serum of Wistar rats and Swiss mice were determined after experimental envenomation. An increase in enzymatic activities of Aspartate Aminotransferase (AST), Lactate Dehydrogenase (LDH) and levels of serum protein and albumin were observed while a decrease in creatinine level in serum was perceived after 30 min of envenomation. No alterations in urea levels and in kidney histology were detected in the envenomed rats. The global leukocytes count was diminished, with decrease in lymphocytes, eosinophils and neutrophils levels in the bloodstream, while no alterations were found in hematological parameters of red series in rats injected with H. lunatus venom. IL-2, IL-4, IL-6, INF-γ, TNF, IL-17A and IL-10 levels were evaluated 0.5, 3 and 6 h after experimental envenomation of mice with H. lunatus venom. From all the analyzed cytokines, only IL-6 showed an increase in serum levels. Taken together, these results point out that envenomation by H. lunatus can impair hematological and immunological parameters and therefore might be monitored in accidents involving this species.
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Affiliation(s)
- F Costal-Oliveira
- Departamentos de Bioquímica e Imunologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - C Guerra-Duarte
- Departamentos de Bioquímica e Imunologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - K L P Castro
- Departamentos de Bioquímica e Imunologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - B Tintaya
- Instituto Nacional de Salud, Lima, Peru
| | - C Bonilla
- Instituto Nacional de Salud, Lima, Peru
| | - W Silva
- Instituto Nacional de Salud, Lima, Peru
| | - A Yarlequé
- Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - R Fujiwara
- Departamento de Parasitologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - M M Melo
- Escola de Veterinaria, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - C Chávez-Olórtegui
- Departamentos de Bioquímica e Imunologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil.
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24
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Suzuki Y, Hieda M, Fujiwara R, Yamamoto K, Fukui N, Konishi H, Arakawa T, Kumasaka R, Nakanishi M, Fukui S, Nakao K, Ohara T, Noguchi T, Yanase M, Ito K, Goto Y. Correlating factors of exercise capacity improvement after cardiac rehabilitation in post-coronary artery bypass graft surgery patients. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1423] [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: 11/26/2022]
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25
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Kiuchi K, Yoshida A, Takei A, Fukuzawa K, Itoh M, Imamura K, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S, Hirata KI, Kanda G, Okajima K, Shimane A, Yamada S, Taniguchi Y, Yasaka Y, Kawai H. Topographic variability of the left atrium and pulmonary veins assessed by 3D-CT predicts the recurrence of atrial fibrillation after catheter ablation. J Arrhythm 2015; 31:286-92. [PMID: 26550084 DOI: 10.1016/j.joa.2015.03.006] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 03/11/2015] [Accepted: 03/27/2015] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Catheter ablation (CA) is an established therapy for atrial fibrillation (AF). However, the assessment of anatomical information and predictors of AF recurrence remain unclear. We investigated the relationship between anatomical information on the left atrium (LA) and pulmonary veins (PVs) from three-dimensional computed tomography images and the recurrence of AF after CA. METHODS Sixty-seven consecutive AF patients (mean age: 62±10 years, median AF history: 42 (12; 60) months, mean LA size: 41±7 mm, paroxysmal: 56%) underwent CA and were followed for 19±10 months. The segmented surface areas (antral, posterior, septal, and lateral) and dimensions (between the anterior and posterior walls, the right inferior PV and mitral annulus [MA], the right superior PV and MA, the left superior PV and MA, and the mitral isthmus) of the LA were evaluated three dimensionally using the NavX system. The cross-sectional areas of the PVs were also evaluated. RESULTS After the follow-up period, 49 patients (73%) remained free from AF. A multivariate analysis showed that the diameter of the mitral isthmus and cross-sectional area of the right upper PV were associated with AF recurrence (odds ratio: 1.070, CI: 1.02-1.12, p=0.001; odds ratio: 0.41, CI: 0.21-0.77, p=0.006). CONCLUSION Enlargement of the mitral isthmus and a smaller right superior PV cross-sectional area were associated with AF recurrence.
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Affiliation(s)
- Kunihiko Kiuchi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Akihiro Yoshida
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Asumi Takei
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Koji Fukuzawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Mitsuaki Itoh
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Kimitake Imamura
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Ryudo Fujiwara
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Atsushi Suzuki
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Tomoyuki Nakanishi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Soichiro Yamashita
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Ken-Ichi Hirata
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-chou chuou-ku Kobe, Hyogo, Japan
| | - Gaku Kanda
- Department of Cardiology, Himeji Cardiovascular Center, 520 kou saishou, Himeji, Hyogo, Japan
| | - Katsunori Okajima
- Department of Cardiology, Himeji Cardiovascular Center, 520 kou saishou, Himeji, Hyogo, Japan
| | - Akira Shimane
- Department of Cardiology, Himeji Cardiovascular Center, 520 kou saishou, Himeji, Hyogo, Japan
| | - Shinichiro Yamada
- Department of Cardiology, Himeji Cardiovascular Center, 520 kou saishou, Himeji, Hyogo, Japan
| | - Yasuyo Taniguchi
- Department of Cardiology, Himeji Cardiovascular Center, 520 kou saishou, Himeji, Hyogo, Japan
| | - Yoshinori Yasaka
- Department of Cardiology, Himeji Cardiovascular Center, 520 kou saishou, Himeji, Hyogo, Japan
| | - Hiroya Kawai
- Department of Cardiology, Himeji Cardiovascular Center, 520 kou saishou, Himeji, Hyogo, Japan
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26
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Suzuki A, Fukuzawa K, Yamashita T, Yoshida A, Sasaki N, Emoto T, Takei A, Fujiwara R, Nakanishi T, Yamashita S, Matsumoto A, Konishi H, Ichibori H, Inoue N, Hirata KI. CIRCULATING INTERMEDIATE CD14++CD16+ MONOCYTES ARE INCREASED IN PATIENTS WITH ATRIAL FIBRILLATION AND REFLECT FUNCTIONAL REMODELING OF LEFT ATRIUM. J Am Coll Cardiol 2015. [DOI: 10.1016/s0735-1097(15)60466-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Itoh M, Shinke T, Yoshida A, Kozuki A, Takei A, Fukuzawa K, Kiuchi K, Imamura K, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S, Matsumoto A, Otake H, Nagoshi R, Shite J, Hirata KI. Reduction in coronary microvascular resistance through cardiac resynchronization and its impact on chronic reverse remodelling of left ventricle in patients with non-ischaemic cardiomyopathy. Europace 2015; 17:1407-14. [PMID: 25662988 DOI: 10.1093/europace/euu361] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Accepted: 11/17/2014] [Indexed: 11/13/2022] Open
Abstract
AIMS Left bundle branch block (LBBB) induces mechanical dyssynchrony, thereby compromising the coronary circulation in non-ischaemic cardiomyopathy. We sought to examine the effects of cardiac resynchronization therapy (CRT) on coronary flow dynamics and left ventricular (LV) function. METHODS AND RESULTS Twenty-two patients with non-ischaemic cardiomyopathy (New York Heart Association class, III or IV; LV ejection fraction, ≤35%; QRS duration, ≥130 ms) were enrolled. One week after implantation of the CRT device, coronary flow velocity and pressure in the left anterior descending coronary artery (LAD) and left circumflex coronary artery (LCx) were measured invasively, before and after inducing hyperemia by adenosine triphosphate administration, with two programming modes: sequential atrial and biventricular pacing (BiV) and atrial pacing in patients with LBBB or sequential atrial and right ventricular pacing in patients with complete atrioventricular block (Control). We assessed hyperemic microvascular resistance (HMR, mean distal pressure divided by hyperemic average peak velocity) and the relationship between the change in HMR and mid-term LV reverse remodelling. Hyperemic microvascular resistance was lower during BiV than during Control (LAD: 1.76 ± 0.47 vs. 1.54 ± 0.45, P < 0.001; LCx: 1.92 ± 0.42 vs. 1.73 ± 0.31, P = 0.003). The CRT-induced change in HMR of the LCx correlated with the percentage change in LV ejection fraction (R = -0.598, P = 0.011) and LV end-systolic volume (R = 0.609, P = 0.010) before and 6 months after CRT. CONCLUSION Cardiac resynchronization therapy improves coronary flow circulation by reducing microvascular resistance, which might be associated with LV reverse remodelling.
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Affiliation(s)
- Mitsuaki Itoh
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Toshiro Shinke
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Akihiro Yoshida
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Amane Kozuki
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Asumi Takei
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Koji Fukuzawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Kunihiko Kiuchi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Kimitake Imamura
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Ryudo Fujiwara
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Atsushi Suzuki
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Tomoyuki Nakanishi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Soichiro Yamashita
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Akinori Matsumoto
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Hiromasa Otake
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Ryoji Nagoshi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Junya Shite
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
| | - Ken-ichi Hirata
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo, 650-0017 Japan
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28
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Suzuki A, Yoshida A, Takei A, Fukuzawa K, Kiuchi K, Takami K, Itoh M, Imamura K, Fujiwara R, Nakanishi T, Yamashita S, Matsumoto A, Shimane A, Okajima K, Hirata KI. Prophylactic catheter ablation of ventricular tachycardia before cardioverter-defibrillator implantation in patients with non-ischemic cardiomyopathy: Clinical outcomes after a single endocardial ablation. J Arrhythm 2015; 31:122-9. [PMID: 26336545 DOI: 10.1016/j.joa.2014.09.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 03/25/2014] [Revised: 08/27/2014] [Accepted: 09/05/2014] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Outcomes related to prophylactic catheter ablation (PCA) for ventricular tachycardia (VT) before implantable cardioverter-defibrillator (ICD) implantation in non-ischemic cardiomyopathy (NICM) are not well characterized. We assessed the efficacy of single endocardial PCA in NICM patients. METHODS We retrospectively analyzed 101 consecutive NICM patients with sustained VT. We compared clinical outcomes of patients who underwent PCA (ABL group) with those who did not (No ABL group). Successful PCA was defined as no inducible clinical VT. We also compared the clinical outcomes of patients with successful PCA (PCA success group) with those of the No ABL group. Endpoints were appropriate ICD therapy (shock and anti-tachycardia pacing) and the occurrence of electrical storm (ES). RESULTS PCA was performed in 42 patients, and it succeeded in 20. The time to ES occurrence was significantly longer in the ABL group than in the No ABL group (p=0.04). The time to first appropriate ICD therapy and ES occurrence were significantly longer in the PCA success group than in the No ABL group (p=0.02 and p<0.01, respectively). CONCLUSION Single endocardial PCA can decrease ES occurrence in NICM patients. However, high rates of VT recurrence and low success rates are issues to be resolved; therefore, the efficacy of single endocardial PCA is currently limited.
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Affiliation(s)
- Atsushi Suzuki
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Akihiro Yoshida
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan ; Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Asumi Takei
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Koji Fukuzawa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan ; Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kunihiko Kiuchi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kaoru Takami
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mitsuaki Itoh
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kimitake Imamura
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ryudo Fujiwara
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomoyuki Nakanishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Soichiro Yamashita
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Akinori Matsumoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Akira Shimane
- Division of Cardiovascular Medicine, Hyogo Brain and Heart Center, Himeji, Japan
| | - Katsunori Okajima
- Division of Cardiovascular Medicine, Hyogo Brain and Heart Center, Himeji, Japan
| | - Ken-Ichi Hirata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan ; Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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29
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Nakanishi T, Fukuzawa K, Yoshida A, Itoh M, Imamura K, Fujiwara R, Suzuki A, Yamashita S, Matsumoto A, Konishi H, Ichibori H, Hirata KI. Crista Terminalis as the Anterior Pathway of Typical Atrial Flutter: Insights from Entrainment Map with 3D Intracardiac Ultrasound. Pacing Clin Electrophysiol 2015; 38:608-16. [PMID: 25644937 DOI: 10.1111/pace.12597] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 12/25/2014] [Accepted: 01/12/2015] [Indexed: 12/01/2022]
Abstract
BACKGROUND The precise location of truly active reentry circuits of typical atrial flutter (AFL) has not been well identified. The purpose of this study was to verify our hypothesis that the posterior block line is located along the posteromedial right atrium (PMRA) and the crista terminalis (CT) is the anterior pathway of AFL, with real-time intracardiac echo (ICE). METHODS The entire right atrium (RA) three-dimensional activation and entrainment mapping were evaluated during AFL in 18 patients using CARTO sound. RESULTS The CT was clearly visualized by ICE and the local electrograms along the CT were single potentials in all the patients. The CT was recognized as the truly active anterior pathway based on entrainment mapping in all patients. Double potentials were recorded along the PMRA. Entire RA entrainment mapping could be performed in 16 patients. The reentry circuits were separated into three passages. The first was around the tricuspid annulus (TA), the second the anterior superior vena cava (SVC; AFL waves passed between the anterior SVC and RA appendage), and the last the posterior SVC (between the posterior SVC and upper limit of the PMRA). All three of these passages were active in four, around the TA and anterior SVC in eight, around the TA and posterior SVC in three, and around only the anterior SVC in one patient. CONCLUSIONS The CT functions as the anterior pathway of typical AFL, and the posterior block line was located along the PMRA. Dual or triple circuits were recognized in the majority of AFL patients.
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Affiliation(s)
- Tomoyuki Nakanishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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Fujiwara R, Yoshida A, Hirata KI. Ventricular fibrillation associated with multi-vessel coronary spasms following radiofrequency ablation of atrial fibrillation and atrial flutter. Europace 2014; 16:1060. [PMID: 24446512 DOI: 10.1093/europace/eut404] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ryudo Fujiwara
- Department of internal medicine, Division of cardiovascular medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
| | - Akihiro Yoshida
- Department of internal medicine, Division of cardiovascular medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
| | - Ken-Ichi Hirata
- Department of internal medicine, Division of cardiovascular medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
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31
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Yamashita S, Yoshida A, Fukuzawa K, Fujiwara R, Suzuki A, Nakanishi T, Matsumoto A, Konishi H, Ichibori H, Hirata KI. Upper Limit of Vulnerability During Defibrillator Implantations Predicts the Occurrence of Appropriate Shock Therapy for Ventricular Fibrillation. Circ J 2014; 78:1606-11. [DOI: 10.1253/circj.cj-14-0136] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Soichiro Yamashita
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Akihiro Yoshida
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Koji Fukuzawa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Ryudo Fujiwara
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Atsushi Suzuki
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Tomoyuki Nakanishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Akinori Matsumoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Hiroki Konishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Hirotoshi Ichibori
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Ken-ichi Hirata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
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Fukushima K, Kanemoto H, Ohno K, Takahashi M, Fujiwara R, Nishimura R, Tsujimoto H. Computed tomographic morphology and clinical features of extrahepatic portosystemic shunts in 172 dogs in Japan. Vet J 2013; 199:376-81. [PMID: 24512983 DOI: 10.1016/j.tvjl.2013.11.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [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: 05/02/2013] [Revised: 09/26/2013] [Accepted: 11/17/2013] [Indexed: 11/18/2022]
Abstract
Canine extrahepatic congenital portosystemic shunts (EH-cPSS) are classified into several anatomical types, depending on the origin and termination of the shunt vessel. The aim of this retrospective study was to determine the proportion and clinical features of each anatomical shunt type in a population of dogs presented to a veterinary teaching hospital in Japan. Dogs diagnosed with EH-cPSS using computed tomographic (CT) portography were included (n=172) and shunts were classified based on previous reports. Clinical data were collected from case records and analysed statistically. The most common anatomical type was the spleno-phrenic shunt (n=64), followed by the spleno-azygos (n=38), right gastric-caval (n=29), spleno-caval (n=21), right gastric-caval with caudal loop (n=9), right gastric-phrenic (n=6), colono-caval (n=3), spleno-phrenic and azygos (n=1), and porto-caval (n=1) shunts. Spleno-phrenic and spleno-azygos shunts were diagnosed more frequently in older dogs than right gastric-caval and spleno-caval shunts (P<0.05). The portal vein/aortic (PV/Ao) ratio was significantly larger in dogs with spleno-phrenic shunts than in dogs with spleno-azygos, right gastric-caval or spleno-caval shunts (P<0.05). The PV/Ao ratio was significantly larger in dogs with spleno-azygos shunts than in dogs with right gastric-caval shunts. Dogs with spleno-phrenic shunts had significantly lower serum alkaline phosphatase activities than those with right gastric-caval or spleno-caval shunts. Dogs with spleno-phrenic shunts had significantly lower fasting ammonia concentrations than those with spleno-caval shunts.
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Affiliation(s)
- K Fukushima
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - H Kanemoto
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - K Ohno
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
| | - M Takahashi
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - R Fujiwara
- Department of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - R Nishimura
- Department of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - H Tsujimoto
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Arakawa T, Noguchi T, Fujiwara R, Miyamoto Y, Higashi M, Goto Y, Ishihara M, Yasuda S, Ogawa H, Naito H. An innovative multi-detector computed tomography image-processing method for quantitative coronary artery analysis: the NCVC system. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p2931] [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: 11/14/2022] Open
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Fujiwara R, Noguchi T, Nonogi H, Kumasaka R, Arakawa T, Nakanishi M, Goto Y, Ishihara M, Yasuda S, Ogawa H. Are they really not guilty who present to the emergency department with acute chest pain, no obstructive coronary artery disease by CT angiography? Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p4708] [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: 11/13/2022] Open
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Itoh M, Yoshida A, Fukuzawa K, Kiuchi K, Imamura K, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S, Matsumoto A, Hirata KI. Time-dependent effect of cardiac resynchronization therapy on ventricular repolarization and ventricular arrhythmias. Europace 2013; 15:1798-804. [DOI: 10.1093/europace/eut145] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [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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Nakashima R, Fujiwara R, Hosono Y, Imura Y, Yukawa N, Yoshifuji H, Ohmura K, Fujii T, Mimori T. AB0506 Longitudinal change of the titer of anti-mda5 antibody and association with prognosis in dermatomyositis with interstitial pneumonia. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2828] [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]
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Imamura K, Yoshida A, Takei A, Fukuzawa K, Kiuchi K, Takami K, Takami M, Itoh M, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S, Matsumoto A, Hirata KI. Dabigatran in the peri-procedural period for radiofrequency ablation of atrial fibrillation: efficacy, safety, and impact on duration of hospital stay. J Interv Card Electrophysiol 2013; 37:223-31. [PMID: 23585240 PMCID: PMC3738875 DOI: 10.1007/s10840-013-9801-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 03/05/2013] [Indexed: 11/25/2022]
Abstract
Purpose Dabigatran is effective for both the prevention of stroke and bleeding in patients with atrial fibrillation (AF). However, the safety and efficacy of the use of dabigatran in the peri-procedural period for radiofrequency catheter ablation (RFCA) of AF is unknown. Therefore, the purpose of this study was to evaluate the safety and efficacy of dabigatran in the peri-procedural period for RFCA of AF and the duration of hospital stay. Methods Consecutive patients (n = 227) who underwent RFCA for AF were prospectively analyzed. Peri-procedural anticoagulant therapy with dabigatran (n = 101, D group) was compared with warfarin and heparin bridging (n = 126, W group). Dabigatran was discontinued 12–24 h before and restarted 3 h after the procedure. Warfarin was stopped 3 days before the procedure and unfractionated heparin was administered. Results Ischemic stroke occurred in one patient of the D group (0.8 %). There was no significant difference between the two groups in the incidence of major bleeding (three cases of cardiac tamponade in each group and one case of intracranial bleeding in the W group, p = 0.93) or minor bleeding (five cases in the D group vs. five in the W group, p = 0.54). The duration of hospital stay was significantly shorter in the D group than in the W group (7.2 vs. 10.3 days, p = 0.0001). Conclusions Peri-procedural anticoagulation therapy with dabigatran for RFCA of AF was equally safe and effective compared with warfarin and heparin bridging. The use of dabigatran for RFCA of AF shortened the duration of hospital stay.
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Affiliation(s)
- Kimitake Imamura
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
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Takami K, Yoshida A, Fukuzawa K, Takei A, Kiuchi K, Kanda G, Kumagai H, Takami M, Torii-Tanaka S, Itoh M, Imamura K, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S, Matsumoto A, Hirata KI. Optimal Strength and Number of Shocks at Upper Limit of Vulnerability Testing Required to Predict High Defibrillation Threshold Without Inducing Ventricular Fibrillation. Circ J 2013; 77:2490-6. [DOI: 10.1253/circj.cj-13-0149] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kaoru Takami
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Akihiro Yoshida
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Koji Fukuzawa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Asumi Takei
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Kunihiko Kiuchi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Gaku Kanda
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Hiroyuki Kumagai
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Mitsuru Takami
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Satoko Torii-Tanaka
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Mitsuaki Itoh
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Kimitake Imamura
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Ryudo Fujiwara
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Atsushi Suzuki
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Tomoyuki Nakanishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Soichiro Yamashita
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Akinori Matsumoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Ken-ichi Hirata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
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Abstract
A broth of yeast cells cultivated in molasses was crossfiltered with a thin-channel module. The permeation flux gradually decreased at a constant cell concentration. The flux was much lower than that obtained for yeast broth cultivated in yeast extract, polypeptone, and dextrose (YPD) medium during the filtration. The flux did not depend on the membrane pore size (0.45 to 5 mum). The steady-state flux was one-twentieth that calculated for a cake filtration mode from the amount of cake per unit filtration area and the specific resistance of the cake measured in a dead-end filtration apparatus. The lower flux was due to small particles (most of which were less than 1 mum in diameter) in the molasses. The mehanism of crossflow filtration of broths of yeast cells cultivated in molasses was clarified by analysis of the change in flux with time and observations with scanning electron microscopy. At the initial stage of crossflow filtration the yeast cells and particles from the molasses were deposited on the membrane to form the molasses were deposited on the membrane to form a cake in a similar way to dead-end filtration. After the deposition of cells onto the membrane ceased, the fine particles from molasses formed a thin layer, which had higher resistance than the cake formed next to the membrane. The backwashing method was effective to increase the flux. The flux increased low when the pore size was 0.45 to 0.08 mum, but using larger pores of 3 to 5 mum it returned almost to the bases line. (c) 1994 John Wiley & Sons, Inc.
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Affiliation(s)
- T Tanaka
- Department of Biotechnology, Faculty of Engineering, Okayama University, Tsushima-Naka, Okayama 700, Japan
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Fujiwara R, Yoshida A, Takei A, Fukuzawa K, Takami K, Takami M, Tanaka S, Ito M, Imamura K, Hirata KI. WITHDRAWN: “Heparin bridging” increases the risk of bleeding complications in patients with prosthetic devices and receiving anticoagulation therapy. J Arrhythm 2012. [DOI: 10.1016/j.joa.2011.11.003] [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: 11/26/2022] Open
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Tanaka S, Yoshida A, Fukuzawa K, Takei A, Kanda G, Takami K, Kumagai H, Takami M, Itoh M, Imamura K, Fujiwara R, Hirata KI. Recognition of inferiorly dislocated fast pathways guided by three-dimensional electro-anatomical mapping. J Interv Card Electrophysiol 2011; 32:95-103. [DOI: 10.1007/s10840-011-9595-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 06/01/2011] [Indexed: 11/25/2022]
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Itoh M, Yoshida A, Takei A, Imamura K, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S, Hirata KI. Time-Dependent Relationship between Ventricular Repolarization and Arrhythmia in Patients with Cardiac Resynchronization Therapy. J Arrhythm 2011. [DOI: 10.4020/jhrs.27.op15_4] [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: 11/11/2022] Open
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Itoh M, Yoshida A, Takei A, Imamura K, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S, Hirata KI. Electrical Storm after Left Ventricular Pacing Treated by Triple Site Ventricular Pacing and Atrioventricular Node Ablation. J Arrhythm 2011. [DOI: 10.4020/jhrs.27.pj1_098] [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: 11/11/2022] Open
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Takei A, Yoshida A, Yamashita S, Nakanishi T, Suzuki A, Fujiwara R, Imamura K, Itoh M, Takami M, Hirata KI. Right Atrial Remodeling in Atril Fibrillation: Is It Particular to an Incidence of Typical Right Atrial Flutter? J Arrhythm 2011. [DOI: 10.4020/jhrs.27.pe4_039] [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: 11/11/2022] Open
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Yamashita S, Yoshida A, Takei A, Takami K, Ito M, Imamura K, Fujiwara R, Suzuki A, Nakanishi T, Hirata KI. Upper Limit of Vulnerability at Defibrillator Implantation Predicts the Occurrence of Shocks. J Arrhythm 2011. [DOI: 10.4020/jhrs.27.op48_1] [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: 11/11/2022] Open
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Nakanishi T, Yoshida A, Takei A, Takami M, Ito M, Imamura K, Fujiwara R, Suzuki A, Yamashita S. Characteristics of Non-Pulmonary Vein Foci in Patients with Atrial Fibrillation. J Arrhythm 2011. [DOI: 10.4020/jhrs.27.op20_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: 11/11/2022] Open
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Suzuki A, Yoshida A, Takei A, Takami K, Ito M, Imamura K, Fujiwara R, Nakanishi T, Yamashita S, Hirata KI, Okajima K, Shimane A. Prophylactic Catheter Ablation Can Prolong Time to First Shock Therapy and Reduce Electrical Storm in Patients with Non Ischemic Cardiomyopathy Compared with Ischemic Cardiomyopathy. J Arrhythm 2011. [DOI: 10.4020/jhrs.27.op02_4] [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: 11/11/2022] Open
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Fujiwara R, Hirata KI, Yoshida A, Takei A, Ito M, Imamura K, Suzuki A, Nakanisi T, Yamashita S. Comparison between Internal and External Cardioversion during Ablation for Atrial Fibrillation in Myocardial Damage Measured by Cardiac Enzyme. J Arrhythm 2011. [DOI: 10.4020/jhrs.27.pj2_010] [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: 11/11/2022] Open
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Imamura K, Yoshida A, Takei A, Itoh M, Fujiwara R, Suzuki A, Nakanishi T, Yamashita S. Can the Characteristics of Complex Fractionated Atrial Electrogram after Pulmonary Vein Isolation in Atrial Fibrillation Predict the Clinical Outcome? J Arrhythm 2011. [DOI: 10.4020/jhrs.27.op07_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: 11/11/2022] Open
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