Yutaka Miyoshi
Kitasato University
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Publication
Featured researches published by Yutaka Miyoshi.
The Japanese Journal of Thoracic and Cardiovascular Surgery | 2000
Masaki Nie; Kuniyoshi Ohara; Yutaka Miyoshi; Kazuhiko Tsukuda; Shinzo Torii; Hirokuni Yoshimura
We present a 60-year-old man who underwent coronary artery bypass grafting using an ulnar artery as one of the grafts intended to release angina pectoris. Previously, his right leg had been amputated following a traffic accident. The blood supply of his left leg was reduced due to atherosclerotic stenotic change (left ankle pressure index 0.6). He had been under treatment for severe diabetes mellitus for 4 years. Coronary angiography revealed severe stenosis in the triple coronary artery system. Immediate myocardial revascularization was considered necessary. We considered that saphenous vein grafts and bilateral internal thoracic artery grafts were unsuitable for this patient. Moreover, Allens test was positive in the bilateral forearms. Coronary artery bypass surgery consisted of left internal thoracic artery grafting to the left anterior descending artery, right gastroepiploic artery grafting to the right coronary artery, and left ulnar artery grafting to the diagonal branch. No myocardial or hand complications were observed after surgery. Following a review of the Japanese literature, we conclude that our case is the first report of an ulnar artery graft for coronary artery bypass grafting in Japan.
The Annals of Thoracic Surgery | 2001
Shigeru Kazama; Yutaka Miyoshi; Masaki Nie; Hiroshi Imai; Zong Bo Lin; Atsushi Kurata; Masato Machii
BACKGROUND Ischemic spinal cord damage during thoracic aortic operations has not been eliminated despite application of various adjuncts. We experimentally investigated the protective effects of pentobarbital and hypothermia on the spinal cord subjected to ischemia. METHODS Among nine groups of 6 rabbits each, groups AI to AIII underwent 20-minute infrarenal aortic occlusion, and groups BI to BVI underwent 40-minute occlusion. Five milligrams per kilogram of pentobarbital was administered to groups AII and BII; 10 mg/kg in groups AIII, BIII, and BVI; 20 mg/kg in group BIV; and none in groups AI, BI, and BV. In groups BV and BVI, hypothermia was induced. Forty-eight hours postoperatively, the motor function of the lower limbs was evaluated. RESULTS Statistically significant recovery of motor function was observed in animals in groups AII, AIII, BIII, BIV, BV, and BVI. CONCLUSIONS Pentobarbital showed dose-dependent protective effects of the spinal cord. Moderate hypothermia alone also showed protective effects. Combined use of pentobarbital and hypothermia resulted in highly significant recovery of spinal cord function.
The Annals of Thoracic Surgery | 1999
Shintaro Nemoto; Akira Sakai; Yutaka Miyoshi; Kiyomitsu Yasuhara; Masashi Seguchi
We describe an excised specimen of a stent-implanted valved equine pericardial extracardiac conduit in the right heart. It appears from careful pathologic examination that the stent acted as a nidus for thrombus formation followed by thick neo-intimal development over the stent, which caused restenosis. Restenosis occurred despite anticoagulation.
Annals of Thoracic and Cardiovascular Surgery | 2004
Shintaro Nemoto; Kiyomitsu Yasuhara; Katsutoshi Nakamura; Yutaka Miyoshi; Akira Sakai
Annals of Thoracic and Cardiovascular Surgery | 2002
Hideki Amano; Kuniyoshi Ohara; Masaki Nie; Shinzo Torii; Yutaka Miyoshi; Hirokuni Yoshimura
Annals of Thoracic and Cardiovascular Surgery | 2000
Tsutomu Sanae; Shigeru Kazama; Masaki Nie; Yutaka Miyoshi; Masato Machii; Kuniyoshi Ohara; Hirokuni Yoshimura
The Annals of Thoracic Surgery | 1999
Shigeru Kazama; Masaki Nie; Yutaka Miyoshi
Annals of Thoracic and Cardiovascular Surgery | 2001
Akihiro Nabuchi; Atsushi Kurata; Tsukuda K; Yutaka Miyoshi
北里医学 | 2003
Yutaka Miyoshi; Kuniyoshi Ohara; Masaki Nie; Kyouichi Sudou; Shinzo Torii; Hirokuni Yoshimura
北里医学 | 2000
Shinzo Torii; Kuniyoshi Ohara; Nobuyuki Yamamoto; Toshiaki Watanabe; Yutaka Miyoshi; Tsutomu Sanae; Zong-Bo Lin; Yuko Takeda; Masaki Nie; Hirokuni Yoshimura