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  • Title: Myocardial uptake (rabbit) of six 99mTc-tagged pharmaceuticals and 85Sr after vasopressin-induced necrosis.
    Author: Grossman ZD, Foster AB, McAfee JG, Richardson R, Subramanian G, Markarian B, Gagne G, Bassano D.
    Journal: J Nucl Med; 1977 Jan; 18(1):51-6. PubMed ID: 187742.
    Abstract:
    A new rapid method for producing myocardial necrosis in rabbits was developed, using percutaneous intramyocardial injection of vasopressin in peanut oil. The 15-min procedure resulted in a mortality rate of 15% and a success rate among surviving animals of 50%. When the lesions were 24 hr old, strontium-85 and a technetium-99m-tagged agent were injected intravenously simultaneously, and the animals were killed 1,6, and 24 hr later for tissue radioassay. Strontium-85 failed to accumulate appreciably in the lesions. Three bone-seeking technetium complexes (pyrophosphate, methylene diphosphonate, and imidodiphosphonate) produced lesion-to-normal myocardial ratios of 6,5, and 14, respectively, at 1 hr, and 20,30, and 33 at 6 hr. The ratios for 99mTc-glucoheptonate were only 2 at 1 hr and 4 at 6 hr, while the ratios of 99mTc-acetylcysteine and 99mTc-citrate were even lower.
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