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Eleven of 31 (36%) patients at stage A, i.e., at risk for heart failure but with no structural or functional abnormalities where re-classified by %normal LV myocardium to stage B, i.e., subclinical LV-dysfunction. LV-dysfunction was detected by LVEF (threshold = 50%) and %normal LV myocardium (threshold = 80%) in 29/140(21%) and 121/140(86%) of patients with subclinical disease and in 55/105(52%) and 104/105(99%) of patients, respectively with overt heart failure
