FALSE-POSITIVE REVERSIBLE PERFUSION DEFECT DURING DOBUTAMINE-THALLIUM IMAGING IN LEFT-BUNDLE-BRANCH BLOCK

被引:0
作者
TIGHE, DA
HUTCHINSON, HG
PARK, CH
CHUNG, EK
FISCHMAN, DL
RAICHLEN, JS
机构
[1] THOMAS JEFFERSON UNIV, JEFFERSON MED COLL, DIV CARDIOL, PHILADELPHIA, PA 19107 USA
[2] THOMAS JEFFERSON UNIV, JEFFERSON MED COLL, DIV NUCL MED, PHILADELPHIA, PA 19107 USA
关键词
THALLIUM PERFUSION IMAGING; DOBUTAMINE; LEFT BUNDLE BRANCH BLOCK;
D O I
暂无
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
In the presence of pre-existing left bundle branch block (LBBB) exercise stress thallium scans have been associated with false-positive septal and apical perfusion abnormalities. Recent reports have documented a lower incidence of false-positive septal perfusion defects when pharmacologic agents such as dipyridamole or adenosine are utilized in patients with LBBB. Dobutamine, a synthetic catecholamine, is being used with increasing frequency in combination with perfusion agents for the diagnosis of coronary artery disease in patients unable to achieve an adequate exercise workload. Because the positive inotropic and chronotropic actions of dobutamine are similar to the physiologic effects of treadmill exercise, it is conceivable that false-positive perfusion abnormalities will be observed in patients with preexisting LBBB undergoing dobutamine perfusion imaging. We describe a patient with underlying LBBB who underwent dobutamine thallium imaging which revealed septal and periapical defects. Subsequent coronary angiography showed these abnormalities to be false-positive. It is concluded that septal and periapical perfusion abnormalities during dobutamine thallium imaging may be false-positive and should be interpreted cautiously.
引用
收藏
页码:1989 / 1991
页数:3
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