National Registry of Diseases Office Singapore Myocardial Infarction Registry (SMIR) NRAM096 mi_type MI type based on the American College of Cardiology AMI=acute myocardial infarct (unspecified), T1=type 1, T2=type 2, T3=type 3, T4A=type 4a, T4B=type 4b, T5=type 5 2007-2021