Patients underwent cardiac magnetic resonance imaging ( CMR ) at @-@ days and at @ months and serial blood sampling was performed over @ h for the measurement of plasma creatine kinase ( CK ) and Troponin I. Myocardial infarct size ( extent of late gadolinium enhancement at @-@ days by CMR-the primary endpoint ) did not differ between nitrite and placebo groups after adjustment for area at risk , diabetes status , and centre ( effect size -@ % @ % CI : -@ % , +@ % ; P = @ ) .