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- W42364618 abstract "The authors have investigated the pharmacological behavior of hexakis (t-butylisonitrile)Tc(I) and evaluated it as a potential myocardial perfusion radiopharmaceutical. This complex produces good to excellent heart images in rats, guinea pigs, rabbits, cats, dogs, pigs and baboons. Good heart uptake in guinea pigs, cats and pigs may be predictive of good myocardial imaging in man, since the hearts of these three species extract Tl-201, but not Tc-99m(dmpe)/sub 2/-Cl/sub 2//sup +/ (similar to man, but unlike other animal species). Biodistribution studies reveal initial heart uptake of 1.3 to 2.2% of the injected activity. Imaging and biodistribution show significant initial lung activity which clears substantially during the first hour after injection. Little or no myocardial washout is observed. In rabbits with ischemia induced by coronary artery ligation, the complex distributes as a function of blood flow. Simultaneous injection of Tl-201 and Tc-99m (CN-t-butyl)/sub 6//sup +/ with subsequent dual isotope imaging shows that their initial distribution is a similar. The complex is extracted 100% by isolated rabbit and guinea pig hearts perfused with buffer. When human blood is mixed and co-injected with the complex, myocardial extraction is reduced, but remains high (73-75%). Uptake of the complex by rat myocytes in culture is notmore » inhibited by either ouabain or K/sup +/. These results suggest that this complex may be a promising myocardial perfusion agent and should be tested in man.« less" @default.
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- W42364618 date "1984-01-01" @default.
- W42364618 modified "2023-09-25" @default.
- W42364618 title "Pharmacological characterization of Tc-99m(CN-t-butyl)/sub 6//sup +/: A potential heart agent" @default.
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