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Horiuchi K, Asakura T, Saito F. Superior vena cava syndrome. QJM 2019; 112:743. [PMID: 30945741 DOI: 10.1093/qjmed/hcz064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Kaneyuki D, Nakajima H, Asakura T, Yoshitake A, Tokunaga C, Tochii M, Hayashi J, Takazawa A, Izumida H, Iguchi A. Early First-Generation Trifecta Valve Failure: A Case Series and a Review of the Literature. Ann Thorac Surg 2019; 109:86-92. [PMID: 31336064 DOI: 10.1016/j.athoracsur.2019.05.073] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 05/16/2019] [Accepted: 05/21/2019] [Indexed: 11/24/2022]
Abstract
BACKGROUND The Trifecta valve (Abbott, St Paul, MN) has excellent hemodynamic performance with acceptable rates of freedom from structural valve degeneration. However, some recent studies have reported early Trifecta valve failure. Here, we report a case series of seven Trifecta valve failures with a review of the literature. METHODS Of 107 implantations of Trifecta bioprostheses between 2012 and 2014, we encountered seven Trifecta valve failures (6.5%). Failure of a 19-mm Trifecta valve occurred in 1 patient, failure of a 21-mm Trifecta valve occurred in 5 patients, and failure of a 23-mm Trifecta valve occurred in 1 patient. The mean duration of valve durability was 51 ± 16 months. The mean effective orifice area index on the first echocardiogram after Trifecta valve implantation was 0.96 ± 0.26. The mode of presentation was prosthetic valve stenosis in 3 patients and severe aortic regurgitation in 4 patients. RESULTS Six patients underwent redo surgical aortic valve replacement. The common pathologic findings were circumferential pannus formation with noncoronary cusp tear and leaflet calcification. The rates of preoperative end-renal stage disease and postoperative prosthesis-patient mismatch were higher in patients with Trifecta valve failure. The incidence of early Trifecta valve failure was 3.1% at 48 months and 13.1% at 72 months. CONCLUSIONS In our experience, early Trifecta valve failure was caused by cusp tears or leaflet calcification. Patients with end-renal stage disease and prosthesis-patient mismatch should be closely followed. Some patients with cusp tears may require urgent surgery.
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Asakura T, Ishii M, Ishii K, Suzuki S, Namkoong H, Okamori S, Kamata H, Yagi K, Funatsu Y, Betsuyaku T, Hasegawa N. Health-related QOL of elderly patients with pulmonary M. avium complex disease in a university hospital. Int J Tuberc Lung Dis 2019; 22:695-703. [PMID: 29862956 DOI: 10.5588/ijtld.17.0433] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Little is known about the clinical characteristics and health-related quality of life (HQOL) of elderly patients with pulmonary Mycobacterium avium complex (pMAC) disease. OBJECTIVES To evaluate HQOL using the 36-Item Short-Form Health Survey and St George's Respiratory Questionnaire (SGRQ) and to investigate the predictors of HQOL changes among elderly patients with pMAC disease. METHODS This prospective cohort registry was conducted at Keio University Hospital, Tokyo, Japan, between May 2012 and July 2015 and included 84 patients with pMAC disease aged 75 years who had completed the HQOL questionnaire and 48 patients with pMAC disease who had been followed up and completed the HQOL questionnaire in cross-sectional and longitudinal analyses, respectively. RESULTS In cross-sectional analyses, elderly patients with pMAC disease had significantly lower role-physical, general health, vitality, social functioning, role-emotional and role/social component scores than the general Japanese elderly population. Analysis of covariance revealed that patients with cavitary lesions had significantly worse physical functioning and SGRQ scores (P < 0.05). Longitudinal analysis showed that under-treatment, short duration of disease and positive sputum smear at baseline were predictors of worse HQOL at 12 months. CONCLUSIONS Elderly patients with pMAC disease have reduced HQOL. Further large studies on HQOL are required to refine the use of this parameter in the treatment of these patients.
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Masaki K, Asakura T, Nakachi I. The eggs of Paragonimiasis westermani in bronchial lavage fluid. QJM 2019; 112:463-464. [PMID: 30597083 DOI: 10.1093/qjmed/hcy301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kaneyuki D, Asakura T, Iguchi A, Yoshitake A, Tokunaga C, Tochii M, Nakajima H. Early- and long-term results of thoracic endovascular aortic repair for blunt traumatic thoracic aortic injury: a single-centre experience. Eur J Cardiothorac Surg 2019; 56:5309042. [PMID: 30753390 DOI: 10.1093/ejcts/ezz023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 01/10/2019] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Endovascular repair has been proposed as an alternative to classical surgical repair for the management of blunt traumatic thoracic aortic injury. However, the long-term outcomes of endovascular repair and the risks of left subclavian coverage remain unclear. METHODS From April 2001 to August 2018, 33 patients with blunt traumatic thoracic aortic injury underwent endovascular repair in our institution. A follow-up computed tomography and a clinical examination were performed before discharge and at 1 month, and yearly or every 2 years thereafter. RESULTS The mean age was 45 ± 19 years. The technical success rate was 100%. Complete coverage of the left subclavian artery (LSCA) was performed in 20 patients (60.6%). Among 20 patients with coverage of the LSCA, revascularization was performed in 1 patient. No in-hospital deaths occurred. The clinical follow-up rate was 97%, with a mean period of 7 years and a maximum of 18 years. The survival rates were 100% at 1 year, 95% at 5 years and 88.7% at 10 years after the event. Among the 5 patients (20%) who developed neurological complications, 1 who had undergone implantation of a 200-mm long stent graft and LSCA coverage without revascularization developed paraplegia during the long-term follow-up. CONCLUSIONS This study demonstrates that the endovascular treatment of blunt traumatic thoracic aortic injury is a safe and effective therapeutic method over a long-term follow-up period. LSCA coverage and long stent graft placement might be indications for revascularization to prevent spinal cord injury.
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Yoshitake A, Tochii M, Asakura T, Takazawa A, Nakajima H. Distal Limited Open Stenting for Aortic Diverticulum in the Right Aortic Arch. Ann Vasc Surg 2019; 57:272.e5-272.e7. [PMID: 30684611 DOI: 10.1016/j.avsg.2018.10.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/17/2018] [Accepted: 10/09/2018] [Indexed: 11/18/2022]
Abstract
An aortic diverticulum, including Kommerell's diverticulum, is an uncommon, congenital, aortic arch anomaly. Surgery for a diverticulum is challenging, and several surgical strategies have been reported. Here, we present the case of an asymptomatic 57-year-old man who was referred to our hospital. Computed tomography revealed right aortic arch and aortic diverticulum, and he underwent distal limited open stenting under hypothermic circulatory arrest with selective cerebral perfusion via median sternotomy. The postoperative course was uneventful. Thus, this report shows that our procedure is useful and safe for treating aortic diverticulum.
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Asakura T. Recent Development and Long-Term Results of Open vs EVAR for Pararenal Abdominal Aortic Aneurysms. Ann Vasc Dis 2018; 11:458-463. [PMID: 30636999 PMCID: PMC6326061 DOI: 10.3400/avd.ra.18-00126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this article, I would like to discuss on the two different treatment options (Open vs EVAR) for pararenal abdominal aortic aneurysm (the term "PRAAA" is not clearly defined and classified). Recently, complex endovascular treatment [Fenestrated EVAR (F-EVAR), Chimney (Snorkel) EVAR (C-EVAR, S-EVAR), Branched EVAR (B-EVAR)] have been developed and applied in selected patients, with encouraging early results; however, the high rate for secondary reinterventions and long-term results remain uncertain. This article introduce new devices and a new concept with endovascular aneurysm sealing (EVAS) are currently available on the market for the treatment of PRAAA. Open repair of PRAAA can be performed with low mortality and long-term survival is favorable from single-center experience in the real world and others. We conclude that open repair remains the golden standard treatment in most centers for PRAAA. However, EVAR of PRAAA may represent an alternative option in high-risk patients. Because the indications and circumstances for PRAAA vary based on patient-specific comorbidities and anatomy, it is recommended that vascular surgeons should be familiar with both treatment strategies and tailor-made strategy for improved long-term results for PRAAA. (This is a translation of Jpn J Vasc Surg 2018; 27: 303-308.).
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Nakajima H, Takazawa A, Yoshitake A, Tochii M, Tokunaga C, Hayashi J, Izumida H, Kaneyuki D, Asakura T, Iguchi A. Intraoperative transit-time flowmetry in patients undergoing coronary surgery to determine relationships between graft flow and patency and prior coronary interventions and flow demand: a retrospective study. J Cardiothorac Surg 2018; 13:121. [PMID: 30466471 PMCID: PMC6249921 DOI: 10.1186/s13019-018-0806-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 11/05/2018] [Indexed: 11/10/2022] Open
Abstract
Background The aim of this study was to delineate impacts of percutaneous coronary intervention (PCI), flow demand, and status of myocardium on graft flow. Methods We retrospectively assessed 736 individual coronary artery bypass grafts that had been created as the sole bypass graft for a vascular region in 405 patients. The grafts comprised 334 internal thoracic artery (ITA) to left anterior descending (LAD), 129 ITA and 65 saphenous vein grafts (SVG) to left circumflex (LCX), and 142 gastroepiploic artery (GEA) and 66 SVG to right coronary artery (RCA). Minimal luminal diameter, size of revascularized area, history of myocardial infarction, and PCI in the relevant area were examined to determine whether these factors are associated with flow insufficiency (FI), which was defined as ≤ 20 mL/min. Results FI developed in 123/736 grafts (16.7%) and correlated significantly with stenosis in the distal portion (23.0% vs. 12.8%, p = 0.0003). Prior myocardial infarction significantly correlated with FI in GEA–RCA (p = 0.002) and ITA–LCX grafts (p = 0.04). There was a history of PCI to the LAD (PCI group) in 54 ITA to LAD bypass grafts (16.2%), whereas the remaining 280 had no history of PCI to the LAD (no-PCI group). Graft flow was significantly greater in the no-PCI than in the PCI group (53 ± 29 vs. 42 ± 27; p = 0.006). The incidences of FI and graft failure were significantly higher in the PCI than the no-PCI group (22.2%, vs. 8.2%; p = 0.003; 9.2% vs. 1.8%; p = 0.003, respectively). Conclusions Prior PCI has a negative impact on graft flow. The influences of small revascularized area, myocardial infarction, and PCI are greater, necessitating consideration of factors associated with flow demand or microvasculature when planning revascularization.
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Namkoong H, Asakura T, Ishii M, Yoda S, Masaki K, Sakagami T, Iwasaki E, Yamagishi Y, Kanai T, Betsuyaku T, Hasegawa N. First report of hepatobiliary Mycobacterium avium infection developing obstructive jaundice in a patient with neutralizing anti-interferon-gamma autoantibodies. New Microbes New Infect 2018; 27:4-6. [PMID: 30505452 PMCID: PMC6249401 DOI: 10.1016/j.nmni.2018.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/24/2018] [Accepted: 10/12/2018] [Indexed: 11/04/2022] Open
Abstract
This study describes a patient who experienced hepatobiliary Mycobacterium avium infection associated with neutralizing anti–interferon gamma (IFN-γ) autoantibodies during treatment for disseminated M. avium disease. Hepatobiliary M. avium infection should be considered in jaundiced patients with neutralizing anti–IFN-γ autoantibodies, including those receiving antimycobacterial therapy for disseminated M. avium disease.
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Domoto S, Asakura T, Nakazawa K, Niinami H. Hybrid repair of multiple subclavian and axillary artery aneurysms in a patient with Marfan syndrome. J Vasc Surg 2018; 68:255. [PMID: 29937032 DOI: 10.1016/j.jvs.2017.08.089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Accepted: 08/26/2017] [Indexed: 11/24/2022]
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Ebisudani T, Asakura T, Ueda S, Ishii M, Betsuyaku T. Anti-aminoacyl tRNA synthetase antibody-positive clinically amyopathic dermatomyositis. QJM 2018; 111:425-426. [PMID: 29346626 DOI: 10.1093/qjmed/hcy008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ohara Y, Asakura T, Ueda S, Yamada Y, Ishii M, Betsuyaku T. Bilateral upper lobe Pneumocystis pneumonia during aerosolized pentamidine prophylaxis. QJM 2018; 111:337-338. [PMID: 29211898 DOI: 10.1093/qjmed/hcx233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Matsuda S, Suzuki S, Morimoto K, Aono A, Nishio K, Asakura T, Sasaki Y, Namkoong H, Nishimura T, Ogata H, Hasegawa N, Kurashima A, Ishii M, Tatsumi K, Mitarai S, Goto H. Mycobacterium triplex pulmonary disease with acquired macrolide resistance in immunocompetent patients. Clin Microbiol Infect 2018; 24:671-672. [PMID: 29309938 DOI: 10.1016/j.cmi.2017.12.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/25/2017] [Accepted: 12/26/2017] [Indexed: 11/26/2022]
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Ikeda M, Asakura T, Uwabe K, Morita K, Iguchi A, Niinami H. [Re-operation for Saccular Aneurysm after Ascending Aortic Replacement with Homograft;Report of a Case]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2017; 70:855-858. [PMID: 28894059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A 62-years-old female had undergone ascending aortic replacement with homograft for graft infection and mediastinitis after initial replacement of ascending aorta due to acute type A dissection. Ten years after homograft replacement, follow up computed tomography showed acute growing saccular aneurysm of the homograft without infectious symptoms. We urgently performed Bentall procedure and hemiarch replacement successfully. Pathological diagnosis was true aneurysm of the homograft. She was discharged from hospital without any complication and has been quite uneventful 7 years after surgery. True aneurysm of the homograft is very rare and our case is the 1st report of successful reoperation.
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Tanaka K, Sata M, Komuro I, Saotome T, Yamashita Y, Asakura T. P5377Biodegradable extremely small diameter vascular graft made of silk fibroin leads rapid vascular remodeling; a preliminary evaluation. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kotoh K, Tanaka M, Sakamoto T, Takashima S, Asakura T, Uda T, Sugiyama T. Multi-Component Behavior of Hydrogen Isotopes in Zeolite Packed-Beds Used for Cryogenic Pressure Swing Adsorption. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst09-a8899] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nakajima H, Iguchi A, Tabata M, Kambe M, Ikeda M, Uwabe K, Asakura T, Niinami H. Preserved autoregulation of coronary flow after off-pump coronary artery bypass grafting: retrospective assessment of intraoperative transit time flowmetry with and without intra-aortic balloon counterpulsation. J Cardiothorac Surg 2016; 11:156. [PMID: 27894326 PMCID: PMC5126996 DOI: 10.1186/s13019-016-0550-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 11/22/2016] [Indexed: 11/21/2022] Open
Abstract
Background Intra-aortic balloon pumping (IABP) markedly increases graft flow after coronary artery bypass grafting (CABG) with cardiopulmonary bypass. We sought to delineate the effects of IABP on graft flow after off-pump CABG (OPCAB). Methods The clinical records of 32 patients (25 male, 7 female; mean age: 70 ± 9 years) who underwent OPCAB with IABP between January 2011 and May 2015 were retrospectively reviewed. Thirteen patients (41%) had a history of myocardial infarction, and 13 patients (41%) had a history of percutaneous coronary intervention. In total, there were 76 bypass grafts with 102 distal anastomoses. These included 50 in situ or pedicled grafts and 26 aortocoronary grafts. After completion of the anastomoses, the heart was positioned normally, and graft flow with IABP was measured using transit-time flowmetry under stable circulation. Then, IABP was turned off for 30 s to a few minutes, until graft flow was constant, for measurement of flow off IABP. Results The angiographic patency rate was 100% (47/47). Overall, graft flow was 55 ± 36 ml/min on IABP and 53 ± 36 ml/min off IABP (p = 0.37). The pulsatility index was 4.1 ± 2.1 on IABP and 2.7 ± 1.5 off IABP (p < 0.001). There was no significant difference in graft flow between on and off IABP for aortocoronary bypass or in situ grafts. Graft flow was 57 ± 36 ml/min on IABP and 55 ± 37 ml/min off IABP (p = 0.41) in in situ grafts and 52 ± 34 ml/min on IABP and 49 ± 35 off IABP (p = 0.41) in aortocoronary grafts. Graft flow on IABP was more than 5 ml/min greater in 28 (37%) bypass grafts, and more than 5 ml/min lower in 20 (26%) bypass grafts. Conclusion In contrast to previous reports for conventional CABG, graft flow after OPCAB was not necessarily increased by IABP, regardless of elevated diastolic arterial pressure. It is suggested that preserved autoregulation of coronary flow contributes to a lower impact on the heart and early functional recovery, and consequently, greater perioperative safety of OPCAB.
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Asakura T, Higuchi A, Mori N. Streptococcus pneumoniae-induced purpura fulminans. QJM 2016; 109:499-500. [PMID: 27083982 DOI: 10.1093/qjmed/hcw060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Indexed: 11/14/2022] Open
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Domoto S, Kimura F, Asakura T, Nakazawa K, Koike H, Niinami H. Intraspinal collateral circulation to the artery of Adamkiewicz detected with intra-arterial injected computed tomographic angiography. J Vasc Surg 2016; 63:1631-4. [DOI: 10.1016/j.jvs.2015.07.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 07/13/2015] [Indexed: 10/23/2022]
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Takazawa A, Nakajima H, Iguchi A, Tabata M, Morita K, Koike H, Uwabe K, Asakura T, Niinami H. Impacts of Intraoperative Flow on Graft Patency of Sequential and Individual Saphenous Vein Grafts. INNOVATIONS-TECHNOLOGY AND TECHNIQUES IN CARDIOTHORACIC AND VASCULAR SURGERY 2015. [DOI: 10.1177/155698451501000202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nakajima H, Iguchi A, Tabata M, Koike H, Morita K, Takahashi K, Asakura T, Nishimura S, Niinami H. Predictors and prevention of flow insufficiency due to limited flow demand. J Cardiothorac Surg 2014; 9:188. [PMID: 25471304 PMCID: PMC4264538 DOI: 10.1186/s13019-014-0188-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Accepted: 11/20/2014] [Indexed: 11/10/2022] Open
Abstract
Background We investigated the impacts of flow demand and native coronary stenosis on graft flow and patency. Methods We reviewed the angiograms of 549 bypass grafts in 301 patients who underwent off-pump coronary artery bypass grafting since 2007. Grafts consisted of 237 internal thoracic artery to left anterior descending artery; 97 internal thoracic artery and 52 saphenous vein grafts to left circumflex artery; and 109 gastroepiploic artery and 54 saphenous vein grafts to right coronary artery. We selected only individual bypass grafts created as the sole bypass graft to the coronary vascular region. Flow insufficiency was defined as ≤ 20 ml/min measured intraoperatively. When a significant difference in the incidence of flow insufficiency or “not functional” occurred between higher and lower values rather than the particular minimal luminal diameter value, the highest value was defined as the cut-off minimal luminal diameter. Distal lesions were defined as stenosis at segment #4, 7, 8, 12, 13, 14, or 15. Results Flow insufficiency was found in 112/549 (20.4%) bypass grafts. For internal thoracic artery to left circumflex artery grafts, the cut-off minimal luminal diameter for proximal and distal lesions was 1.25 mm and 0.75 mm, respectively. For gastroepiploic artery to right coronary artery grafts, the cut-off minimal luminal diameter was 0.82 mm for proximal lesions (p = 0.005), while 10 (71%) of 14 gastroepiploic artery grafts for distal lesions presented with flow insufficiency. Univariate and multivariate analysis identified a distal lesion (odds ratio (OR): 3.12, p < 0.0001); minimal luminal diameter greater than the cut-off value (OR: 3.64, p < 0.0001); right coronary artery (OR: 18.2, p = 0.0002) and left circumflex artery (OR; 2.29, p = 0.009) grafting; and a history of myocardial infarction in the grafted region (OR: 2.21, p = 0.02) as significant predictors of flow insufficiency. Conclusions Both competitive flow and insufficient flow demand cause graft failure. For distal lesions, more severe stenosis is necessary to avoid graft failure, compared with proximal lesions. A revascularization strategy for distal lesions should be discussed separately from that for proximal lesions. Electronic supplementary material The online version of this article (doi:10.1186/s13019-014-0188-3) contains supplementary material, which is available to authorized users.
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Nakajima H, Uwabe K, Asakura T, Yoshida Y, Iguchi A, Niinami H. Emergent surgical repair of left ventricular rupture after blunt chest trauma. Ann Thorac Surg 2014; 98:e35-6. [PMID: 25087828 DOI: 10.1016/j.athoracsur.2014.03.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 02/23/2014] [Accepted: 03/26/2014] [Indexed: 11/25/2022]
Abstract
A 63-year-old man presented with sudden cardiac shock due to cardiac rupture after a blunt chest trauma. We emergently repaired 2 rupture sites with the sandwich technique. This technique maintained the ventricular geometry, and minimized impairment of cardiac function.
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Asakura T, Ishizuka T, Miyajima T, Toyoda M, Sakamoto S. Prediction of low-frequency structure-borne sound in concrete structures using the finite-difference time-domain method. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2014; 136:1085. [PMID: 25190384 DOI: 10.1121/1.4892784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Due to limitations of computers, prediction of structure-borne sound remains difficult for large-scale problems. Herein a prediction method for low-frequency structure-borne sound transmissions on concrete structures using the finite-difference time-domain scheme is proposed. The target structure is modeled as a composition of multiple plate elements to reduce the dimensions of the simulated vibration field from three-dimensional discretization by solid elements to two-dimensional discretization. This scheme reduces both the calculation time and the amount of required memory. To validate the proposed method, the vibration characteristics using the numerical results of the proposed scheme are compared to those measured for a two-level concrete structure. Comparison of the measured and simulated results suggests that the proposed method can be used to simulate real-scale structures.
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Asakura T, Kodera S, Kanda J, Ikeda M. Thiamine-responsive pulmonary hypertension. CASE REPORTS 2013; 2013:bcr-2012-007938. [DOI: 10.1136/bcr-2012-007938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Ogushi K, Lim P, Barr AR, Takahashi S, Asakura T, Ito K. Japanese Barley Meets Australia: Quality Performance of Malting Barley Grown in Different Countries. JOURNAL OF THE INSTITUTE OF BREWING 2012. [DOI: 10.1002/j.2050-0416.2002.tb00555.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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