© 2005 by the American Diabetes Association, Inc.
Detection of Silent Myocardial Ischemia in Asymptomatic Diabetic SubjectsThe DIAD study
1 Department of Cardiology, Royal Infirmary of Edinburgh, Edinburgh, Scotland Address correspondence to James D. Walker, Medical Unit, St. Johns Hospital, Livingston, EH54 6PP, Scotland, U.K. E-mail: james.walker@wlt.scot.nhs.uk
We were impressed by the results of the Detection of Silent Myocardial Ischemia in Asymptomatic Diabetic Subjects (DIAD) study (1), which found that silent myocardial ischemia (SMI) was present in 22% of a large cohort of asymptomatic patients with type 2 diabetes and that the strongest predictor for abnormal cardiac tests was an abnormal Valsalva test. We have also found that autonomic function predicts SMI but that abnormal sympathetic, rather than parasympathic, tests are predictive.
We selected 12 patients with type 2 diabetes and 12 nondiabetic patients with documented exercise-induced electrocardiogram (ECG) changes (Bruce protocol) and angiographically proven coronary artery disease from the cardiac catheterization database of
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