[Recent pictures of the vet lung during chronic kidney failure (proceedings)].
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Biomedical subjects
Publications and source records attributed to C Contini.
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The acute systemic and coronary haemodynamic effects of a new hypotensive drug L 6150 (3-hydrazino-6-[N,N-bis(2-hydroxyethyl)amino]pyridazine) have been studied in six patients with renal or essential hypertension. The drug, administered intravenously at a dose of 2-9 mg, caused a marked hypotension and increase of cardiac output in five cases. Though left ventricular work was reduced or unchanged after the drug, myocardial blood flow increased markedly, coronary resistance decreased and coronary A-V oxygen difference decreased by about 50% indicating coronary vasodilation. When compared with the available data on the effects of hydrazinophthalazine, L 6150 appeared to have qualitatively similar effects, but a somewhat greater direct coronary vasodilator effect.
In patients with ischemic heart disease the evaluation of regional myocardial perfusion by 133Xenon intracoronary injection using a gamma camera computer system allows the detection of regional alterations of myocardial perfusion. While at rest a minority of the patients studied shows large alterations, during pacing induced angina a severe reduction of regional myocardial perfusion can be evidenced both in initial distribution scintigrams, when the injection is performed during angina, and on the washout curves when angina is induced immediately after the injection, during the course of the washout.
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