- 期刊
Reverse Redistribution during Dipyridamole Thallium - 201 Myocardial Single Photon Emission Computed Tomography in Coronary Artery Disease
Dipyridamole T1 - 201心肌單光子電腦斷層逆再分佈現象與冠狀動脈疾病
摘要
1100 例接dipyridamole TI-201 心肌單光子電腦斷層掃描的病人當中有96例顯示〝逆再分佈〞現象，本文研究其中26例接受冠狀動脈攝影術的病人，共包含40 塊顯示〝逆再分佈〞現象之區域。其中17塊為右冠狀動脈之分佈區，6塊為左迴旋枝之分佈區，17塊為左前降枝之分佈區。17塊顯示〝逆再分佈〞現象的區域其對應之冠狀動脈為異常，其餘23 塊區域所對應之冠狀動脈則為正常。結論，〝逆再分佈〞現象也可發生於靜脈注射dipyridamole後TI-201心肌單光子電腦斷層掃描，並且較容易在左前降枝及右冠狀動脈之灌注區出現。這種現象不能絕對表示冠狀動脈疾病之存在與否。
關鍵字
無資料並列摘要
Ninety-six of the consecutive 1100 patients who underwent dipyridamole thallium- 201 myocardial single photon emission computed tomography (SPECT) demonstrated reverse redistribution (RR). Twenty-six of the 96 cases who had accepted coronary angiographies were included in this study. RR was present in 40 myocardial segments from the 26 patients. Seventeen segments were in the right coronary artery (RCA) distribution, 17 in the left anterior descending artery (LAD) ¡¥distribution, and 6 in the left circumflex artery (LCX) distribution. Perfusion defects noted on the initial study became more severe in the delayed images in 22 segments and normal perfusion was present during the initial images in 18 segments. Seventeen segments with RR were in the distribution of coronary arteries with abnormal angiographic findings. Of the remaining 23 segments, the angiographic findings were normal. In conclusion, RR can happen in Ti -201 SPECT after dipyridamole and easily appears in the territories of RCA and LAD. It does not absolutely indicate whether the arteries are significantly diseased or normal coronary arteries.
延伸閱讀
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