Perfusion defects and left ventricular dilation after experimental sco
rpion envenomation were evaluated in five dogs. Left ventricular dilat
ion was observed in three dogs and right ventricular dilation in one o
ther, in scans immediately after envenomation. Perfusion defects were
inferred from scans in four dogs. The data are strongly suggestive of
coronary hypoperfusion, and the mechanics of abnormal coronary flow af
ter scorpion envenomation are discussed.