Effects of quinapril on coronary blood flow in coronary artery disease patients with endothelial dysfunction. TREND Investigators. Trial on Reversing Endothelial Dysfunction.

This pilot study evaluates the effects of quinapril, an angiotensin-converting enzyme inhibitor with high tissue-binding affinity, on microvascular endothelial function in patients with mild (<40% narrowing) coronary artery disease and epicardial endothelial dysfunction. Patients randomized to quinapril had a trend suggesting an increase in endothelium-dependent coronary blood flow response.