| Japanese |
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| Title | 運動負荷タリウム心筋スキャンにおける逆再分布現象の検討 - 冠血流, 心筋障害との関係 - |
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| Subtitle | 原著 |
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| Authors | 松田宏史*, 小野口昌久*, 大竹英二*, 村田啓*, 西村重敬**, 加藤健一**, 外山比南子*** |
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| Authors(kana) | |
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| Organization | *虎の門病院放射線科, **循環器センター, ***筑波大学臨床医学系 |
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| Journal | 核医学 |
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| Volume | 26 |
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| Number | 1 |
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| Page | 55-60 |
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| Year/Month | 1989/1 |
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| Article | 原著 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」 タリウム心筋像における逆再分布現象の成因を明らかにするため, 運動負荷心筋SPECTを施行した477例(PTCA群74例, CABG群86例, 非血行再建群317例)で検討した. 逆再分布はPTCA群で12例(16%), CABG群で11例(13%), 非血行再建群で10例(3.2%)にみられ, 血行再建を行ったものに多かった(P<0.01). 逆再分布を認めた33例での当該部責任冠動脈は有意狭窄のないものまたは血行再建後のものが多く, 狭窄のあるものもほぼ全例に側副路を認めた. 逆再分布部の心筋は障害を持つものが多かった. 逆再分布部のwashout rateは正常人と有意差はないものの他の部位に比べ相対的に高値を示した. 結局, 逆再分布は障害の混在した心筋で血流の障害されていない場合に出現しやすかった. したがって逆再分布の存在は障害心筋が混在し, かつ残存心筋への血流が比較的良好であることを示唆すると思われた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Stress thallium myocardial SPECT, Reverse redistribution, Revascularization, Myocardial damage |
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| English |
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| Title | Reverse Redistribution in Stress Thallium Scan - Correlation with Coronary Blood Flow and Myocardial Damage - |
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| Subtitle | |
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| Authors | Hirofumi MATSUDA*, Masahisa ONOGUCHI*, Eiji OHTAKE*, Hajime MURATA*, Shigeyuki NISHIMURA**, Kenichi KATOH**, Hinako TOYAMA*** |
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| Authors(kana) | |
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| Organization | *Division of Nuclear Medicine, **Cardiovascular Center, Toranomon Hospital, ***Institute of Clinical Medicine, Tsukuba University |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 26 |
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| Number | 1 |
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| Page | 55-60 |
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| Year/Month | 1989/1 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] In order to make clear 'reverse redistribution (RR)' phenomenon in stress thallium scan we investigated 477 consequtive patients who were consisted of 74 cases with PTCA (PTCA group), 86 cases with coronary artery bypass graft (CABG group) and 317 cases without any revascularization (N group). RR was detected in 12 cases out of PTCA group (16%), in 11 cases out of CABG group (13%) and in 10 cases out of N group (3.2%), and the incidence of RR in PTCA or CABG group was higher than that of N group (p<0.01). In 33 patients with RR the cases without significant coronary artery stenosis were more than those with stenosis (p<0.01) and the cases with myocardial damage were more than those without damage (p<0.01). In quantitative analysis washout rate at the RR areas showed relatively high value, but it was not significant compared with normal value (53+-9.0% vs. 49+-1.9%). In conclusion, RR had a tendency to appear in the condition of normal myocardium mingled with scar and of sufficient coronary blood flow. The mechanism of the phenomenon was thought to be that initial uptake of thallium in the partially scarred area was as high as in the normal myocardium, but washout of thallium from its remaining normal myocardium is normal or faster so that the defect appears at the myocardium mingled with scar. Therefore existance of reverse redsitribution suspects the myocardium mingled with scar and sufficient coronary blood flow to the remaining normal myocardium. |
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| Practice | Clinical medicine |
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| Keywords | Stress thallium myocardial SPECT, Reverse redistribution, Revascularization, Myocardial damage |
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