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- W2049420881 abstract "We investigated the effect of indomethacin on responses to isoproterenol, bradykinin and nitroglycerin in the feline pulmonary vascular bed when pulmonary vascular resistance was actively increased by infusion of U46619 in order to determine if vasodilator responses to these agents were dependent on the integrity of the cyclooxygenase pathway. Since pulmonary blood flow and left atrial pressure were held constant, changes in lobar arterial pressure directly reflect changes in lobar vascular resistance. Intralobar injections of isoproterenol, bradykinin, and nitroglycerin decreased lobar arterial pressure in a dose-related manner. Pulmonary vasodilator responses to the lower and midrange doses of bradykinin and nitroglycerin were unchanged in the presence of indomethacin whereas pulmonary responses to the highest doses of nitroglycerin and bradykinin were increased by cyclooxygenase blockade. In contrast, pulmonary vasodilator responses to isoproterenol were significantly attenuated in the presence of propranolol, whereas pulmonary vasodilator responses to bradykinin and nitroglycerin were unchanged after beta blockade. The present data indicate that isoproterenol, bradykinin, and nitroglycerin have significant vasodilator activity in the cat when pulmonary vascular tone is actively increased. These data suggest that the formation of vasodilator cyclooxygenase products such as PGI2 do not mediate vasodilator responses to isoproterenol, bradykinin, and nitroglycerin in the feline pulmonary vascular bed." @default.
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- W2049420881 date "1984-08-01" @default.
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- W2049420881 title "Influence of cyclooxygenase blockade on responses to isoproterenol, bradykinin and nitroglycerin in the feline pulmonary vascular bed" @default.
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- W2049420881 doi "https://doi.org/10.1016/0090-6980(84)90061-3" @default.
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