Biomedical subjects
Publications and source records attributed to R Borgoglio.
The substitution of the diltiazem acetyl-group with other chemical structures greatly influences its pharmacological properties as exerted upon the perfused heart. In particular, the substitution with a nicotinic group enhances its capacity of lowering Coronary Perfusion Pressure without the usual secondary effects observable on Heart Rate and Developed Pressure.
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The relaxing effect of Amrinone, an inotropic and vasodilating agent, was investigated on the isolated guinea pig tracheal smooth muscle in comparison and in association with Aminophylline. Amrinone (pD2 = 5.02 +/- 0.07) resulted more active than Aminophylline (pD2 = 4.25 +/- 0.08) in relaxing the isolated guinea pig trachea. The interaction curves of the two drugs showed the pattern typical for "competitive synergism", thus suggesting that Amrinone may act on tracheal muscle through inhibition of phosphodiesterase.