低レベル運動併用のdipyridamole負荷Tl心筋スキャンにおける逆再分布現象の検討  [in Japanese] Reverse Redistribution in 201Tl Myocardial Imaging Using Dipyridamole Infusion Method Combined with Low Level Exercise.  [in Japanese]

Access this Article

Author(s)

Abstract

低レベル運動併用のdipyridamole負荷Tl心筋スキャンにおける逆再分布現象 (RR) の成因を調べるために虚血性心疾患73例 (219領域) を対象に冠狭窄, 心筋障害, および血行再建 (CABG) の有無について検討した。RRは, 血行再建 (CABG) 群では55領域中10領域 (18.2%) に, 非血行再建群では150領域中4領域 (2.7%) にみられ, 血行再建を行ったものに多かった (p>0.01) 。また, 血行再建群でRRを認めた領域はすべて心筋障害を有していた。以上より, RRは障害心筋が混在し, かっ残存心筋への血流が比較的良好な部位に多いことが示唆された。

<I>To make clear the cause of the reverse redistribution phenomenon (RR) in thallium-201 myocardial imaging using dipyridamole infusion method combined with low level exercise (DE-method), we investigated 73 patients (219 segments) including 23 cases with coronary artery bypass graft (CABG) and 50 cases with non-revascularization.</I><BR><I>RR was detected at the 10 segments in 55 post-CABG segments (18.2%), whereas only 4 RR segments were detected in 150 non-revascularized segments (2.7%) .</I><BR><I>All of RR segments in the post-CABG group had a partial myocardial damage. In each case with RR, washout rate of the RR segment showed higher value than those of non-RR segments.</I><BR><I>Therefore, RR was thought to be seen in the area with a partial myocardial damage and with sufficient coronary flow by the revascularization.</I>

Journal

  • RADIOISOTOPES

    RADIOISOTOPES 42(11), 624-628, 1993

    Japan Radioisotope Association

Codes

Page Top