Number of AMI episodes of care discharged between April 1 and March 1 of the fiscal year
1. a. Acute myocardial infarction (AMI) (ICD-10-CA: I21, I22; ICD-9/ICD-9-CM: 410) is coded as most responsible diagnosis (MRDx) but not also as a diagnosis type (2); or
b. Where another diagnosis is coded as MRDx and also as a diagnosis type (2), and a diagnosis of AMI is coded as a type (1) \[type (C) for Quebec data\] or (type (W), (X) or (Y) but not also as type (2)); or
c. Where coronary artery disease (ICD-10-CA: I25.0, I25.1, I25.8, I25.9; ICD-9/ICD-9-CM: 429.2, 414.0, 414.8, 414.9) is coded as MRDx, AMI as type (1) \[type (C) for Quebec data\] or type (W), (X) or (Y) but not also as type (2); along with revascularization procedure (percutaneous coronary intervention–CCI: 1.IJ.50^^ ; 1.IJ.57.GQ^^ \[this code is used for 2002–2003 to 2017–2018 data only\]; 1.IJ.54.GQ-AZ \[this code is used for 2006–2007 to 2008–2009 data only\]; 1.IJ.57.GT*; 1.IJ.57.GU*; CCP: 48.02, 48.03; ICD-9-CM: 36.01, 36.02, 36.05; or coronary artery bypass–CCI: 1.IJ.76^^ ; CCP: 48.1^; ICD-9-CM: 36.1^).
2. Episodes involving inpatient care. An episode may start or end in a day surgery setting. Episodes that both start and end in day surgery settings are not included.
3. Discharge between April 1 and March 1 of the following year (period of case selection ends March 1 to allow for 30 days of follow-up)
4. Age 18 and older
5. Sex recorded as male or female
6. Urgent/emergent episodes (Admission Category Code = U in any records within an episode)
1. Records with an invalid health card number
2. Records with admission category of cadaveric donor or stillbirth (Admission Category Code = R or S)
3. Records with an invalid code for province issuing health card number
4. Records with an invalid admission date or time
5. Records with an invalid discharge date or time
6. Episodes with discharge as death (DAD Discharge Disposition Code = 07, 72*, 73*, 74*; NACRS Visit Disposition Code = 10, 11, 71*, 72*, 73*, 74*)
7. Episodes with length of stay less than 24 hours
8. AMI episodes that are within 30 days of a previous AMI episode
*2018–2019 data onward.