| Japanese |
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| Title | 梗塞部位再分布はPTCA効果を予測できるか ? - タリウム運動負荷心筋シンチグラフィによる検討 - |
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| Subtitle | 原著 |
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| Authors | 三谷勇雄*, 西村恒彦*, 植原敏勇*, 林田孝平*, 住吉徹哉**, 土師一夫** |
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| Authors(kana) | |
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| Organization | *国立循環器病センター放射線診療部, **内科 |
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| Journal | 核医学 |
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| Volume | 27 |
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| Number | 1 |
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| Page | 1-7 |
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| Year/Month | 1990/1 |
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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」 PTCA前の運動負荷タリウム心筋シンチグラフィ (ETMS) において, 負荷4時間後の梗塞部位再分布所見が, PTCA後の心筋血流の改善をどの程度精度高く表現しているかを検討した. 梗塞責任血管に対して, PTCA初回施行し成功した43例において, 術前および術後1か月以内にETMSを試行した結果, 29例 (67%) では術前の梗塞部位の負荷4時間後像は, 術後の負荷直後の灌流分布像にほぼ等しかった (評価相応) . 14例 (33%) では, 術前の梗塞部位の負荷4時間後像に比べて, 術後の負荷直後像では高いタリウム分布を認めた (過小評価) . 過小評価例では責任血管の高度狭窄例 (AHA≧99%) が有意に多く, 負荷中の最大心拍数とrate-pressure productが有意に高かった. また, 梗塞発症からETMS施行までの期間が過小評価例で有意に短く, 特に3か月以内に施行した症例を多く認めた. ETMSによるPTCA前の梗塞部位残存心筋の評価には, その有用性とともに限界を認める. |
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| Practice | 臨床医学：一般 |
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| Keywords | Myocardial infarction, Myocardial viability, Exercise thallium-201 scintigraphy, Percutaneous transluminal coronary angioplasty |
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| English |
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| Title | Clinical Variables that Can Cause the Underestimation of the Viable Myocardium in the Infarcted Area : Results of the Sequential Exercise Thallium-201 Myocardial Scintigraphy |
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| Subtitle | Original Articles |
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| Authors | Isao MITANI, Tsunehiko NISHIMURA, Tosheiisa UEHARA, Kohei HAYASHIDA, Tetsuya SUMIYOSHI, Kazuo HAZE |
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| Authors(kana) | |
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| Organization | National Cardiovasular Center |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 27 |
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| Number | 1 |
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| Page | 1-7 |
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| Year/Month | 1990/1 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] Clinical variables that can cause the underestimation of the viable myocardium were examined in the sequential exercise thallium-201 study before and after PTCA. Among 60 patients who had documented myocardial infarction with single coronary artery disease, 43 patients had successful PTCA. Compared to the initial images after PTCA, the 4 hour-delayed images before PTCA had larger and more severe defect in the infarcted area of 14 patients (33%) . This underestimated group had shorter period from the infarction to the stress study. (3.4+-2.4 M vs. 7.1+-9.2 M ; P<0.05) , and attained more maximal heart rate during the stress study. The numbers of the patients who had severe stenosis (>=99%) were more in the underestimated group (79% vs. 34% ; p<0.01) . The patients who have recent myocardial infarction, especially within three months, are likely to be underestimated their viable myocardium in the infarcted area, and this variable is dependent from their workload during the stress study and the severity of the stenotic lesion which also affect the estimation of the myocardial viability. |
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| Practice | Clinical medicine |
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| Keywords | Myocardial infarction, Myocardial viability, Exercise thallium-201 scintigraphy, Percutaneous transluminal coronary angioplasty |
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