[Experimental coronary ligation in swine: reduction of myocardial infarct and hemodynamic and metabolic changes by means of the calcium antagonist RO 11-1781].

In a comparative study the effect of the new calcium antagonist Ro 11-1781 on experimental infarct size and left ventricular function in the pig has been investigated. The calcium antagonist was administered 30 min prior to ligation of the left anterior descending coronary artery and twice daily on the following 4 days. For morphometric assessment of infarct size the ventricular myocardium was cut into slices and stained with nitro-benztoluene. There was a significant reduction in infarct size of about 25% in the calcium antagonist-treated group in comparison with the control group. After coronary occlusion left ventricular function is equally depressed in both groups, as is myocardial lactate extraction, which becomes negative.