Angiotensin-Converting Enzyme Inhibitors and 3-Hydroxy-3-Methylglutaryl Coenzyme A Reductase in Cardiac Syndrome X

Abstract
Background— Morbidity of patients with Syndrome X (SX; chest pain and normal coronary angiograms) is high and is associated with continuing episodes of chest pain and hospitalization. Impairment of microvascular endothelial function caused by increased oxidative stress has been suggested to be a mechanism of the disease. Superoxide dismutase (SOD) is the major antioxidant enzyme system of the vascular wall. This study sought to establish whether combination treatment with ACE inhibitors and statins reduces oxidative stress and improves quality of life of patients with cardiac SX.

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