Abstract
Insulin-dependent diabetic (IDDM) subjects with microalbuminuria have an increased long-term risk of overt cardiovascular disease; however, the early exposure to cardiovascular risk factors may increase their predisposition to current silent myocardial ischaemia. The frequency of silent myocardial ischaemia detected by stress echocardiography and electrocardiography was significantly greater in 32 asymptomatic IDDM patients with microalbuminuria compared to 32 normoalbuminuric IDDM patients (25% [n = 8] vs 6.3% [n = 2]; p = 0.03, odds ratio [95% CI] 6.3 [1.2, 37.8]). Elective coronary artery bypass grafting was required in 1 patient with microalbuminuria and silent myocardial disease. Microalbuminuria and poorer autonomic function were independently associated with silent myocardial ischaemia in multivariate analysis (p = 0.03 and p = 0.02, respectively). Screening for silent myocardial ischaemia using these non-invasive tests may be warranted in microalbuminuric IDDM which patients could be of considerable clinical importance.
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