RESULTS A total of 168 patients were studied. 70 patients were excluded due to various causes such as smoking, diabetes etc. The remaining 98 patients underwent final assessment. A majority of these patients, that is, 57 patients showed impaired vasodilation. This is a strong and indirect evidence for endothelial dysfunction.CONCLUSION Majority of the patients diagnosed as cardiac syndrome X, had impaired flow mediated dilation of the artery. This is a strong and indirect evidence for endothelial dysfunction in this group of patients. These results show that endothelial dysfunction as shown by impaired flow mediated vasodilation is highly prevalent among patients with cardiac syndrome X. Thus it is clear that endothelial dysfunction plays a major role in patients with cardiac syndrome x.

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