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Observations are presented about the effects of four kinds of coronary vasodilators (dipyridamole, oxyfedrine, prenylamine and trimetazidine) on coronary circulation in the heart with coronary sclerosis which has been induced by intravenous injection of allylamine in the dog. Following results are obtained: 1) All of the drugs examined increase coronary blood flow and decrease coronary vascular resistance in the dogs with coronary sclerosis as well as in normal dogs. 2) An amplitude of response of coronary circulation to the coronary vasodilators is significantly  less in the dogs with coronary sclerosis than in the normal dogs. 3) The clinical value of coronary vasodilator has been discussed.

EFFECT OF CORONARY VASODILATORS ON CARDIAC DYNAMICS OF THE NORMAL DOG AND THE DOG WITH EXPERIMENTAL CORONARY SCLEROSIS