2Cohn PF. Total ischemie burden pathophysiolo- gy and prognosis. Am J Cardial, 1987,59:30.
3Celermajeer DS, Solensen KE, Gooch VM, et al. Non - invasive de - tection of endothelial dysfunction in childen and adults at risk of atherosclerosis [ J ]. Lancet, 1992,340 : 1111.