Journal
CIRCULATION JOURNAL
Volume 69, Issue 10, Pages 1212-1217Publisher
JAPANESE CIRCULATION SOC
DOI: 10.1253/circj.69.1212
Keywords
cardiac syndrome X; C-reactive protein; cytokine; oxidative stress
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Background Cardiac syndrome X, also known as microvascular angina, is characterized by exercise-induced chest pain occurring despite a normal coronary angiogram. Several causes and mechanisms have been proposed to explain both the chest pain and ST segment depression. In this study, the association, if any, between cardiac syndrome X and several factors, including blood total antioxidant status, C-reactive protein (CRP), and monocyte chemotactic protein-1 (MCP-1) levels, was investigated. Methods and Results The study group comprised 36 patients who had been diagnosed as cardiac syndrome X on the basis of a positive treadmill test and a normal coronary angiogram, and 24 control patients. Total serum antioxidant status and CRP were assessed, and the levels of P-selectin, MCP-1, and interleukins 6 and 10 were also measured. Total serum antioxidant levels were determined to be significantly lower in the cardiac syndrome X patients than in the controls. CRP and serum MCP-1 levels, however, were found to be significantly higher in the cardiac syndrome X group. The total serum antioxidant levels and serum MCP-1 levels were comparable with the levels observed in a group of chronic stable angina patients. Conclusions In the present study, patients who had been diagnosed as cardiac syndrome X demonstrated increased systemic oxidative and enhanced inflammatory status.
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