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Name
Hospitalized Heart Attacks
Short/Other Names

Hospitalized Acute Myocardial Infarction Event

Description

This indicator measures the age-standardized rate of new acute myocardial infarction (AMI) events admitted to an acute care hospital for the population age 18 and older.

A new event is defined as a first-ever hospitalization for an AMI or a recurrent hospitalized AMI occurring more than 28 days after the admission for the previous event in the reference period.

For further details, please see the General Methodology Notes.

Interpretation
Lower rates are desirable.
HSP Framework Dimension

Health System Outcomes: Improve health status of Canadians

Areas of Need

Not applicable

Geographic Coverage

All provinces/territories

Reporting Level/Disaggregation

National, Province/Territory, Region

Indicator Results

Accessing Indicator Results on Your Health System: In Depth

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<div role="button" class="expandableTitle" aria-controls="identifyingInfoRegion">Identifying Information</div>
Name
Hospitalized Heart Attacks
Short/Other Names

Hospitalized Acute Myocardial Infarction Event


<div role="button" class="expandableTitle" aria-controls="descAndCalRegion">Indicator Description and Calculation</div>
Description

This indicator measures the age-standardized rate of new acute myocardial infarction (AMI) events admitted to an acute care hospital for the population age 18 and older.

A new event is defined as a first-ever hospitalization for an AMI or a recurrent hospitalized AMI occurring more than 28 days after the admission for the previous event in the reference period.

For further details, please see the General Methodology Notes.

Calculation: Description

(Total number of new AMI events for persons age 18 and older ÷ Total mid-year population age 18 and older) × 100,000 (Age-adjusted)

Unit of Analysis: Single admission

Calculation: Geographic Assignment

Place of residence

Calculation: Type of Measurement

Rate - per 100,000

Calculation: Adjustment Applied

Age-adjusted

Calculation: Method of Adjustment

Direct Standardization
Standard Population:
Canada 2011

Denominator

Description:
Total mid-year population age 18 and older

Numerator

Description:
Cases that are new AMI events admitted to an acute care hospital, age 18 and older

A new event is defined as a first-ever hospitalization for an AMI or a recurrent hospitalized AMI occurring more than 28 days after the admission for the previous event in the reference period.
Inclusions:
1. AMI present on admission — ICD-10-CA: I21, I22 coded as diagnosis type (1) [type (C) for Quebec data only] or [type (M), (W), (X) or (Y), but not also as a diagnosis type (2)]

2. Age at admission 18 years and older

3. Sex recorded as male or female

4. Admission to an acute care institution (Facility Type Code = 1)
Exclusions:
1. Records with an invalid health card number

2. Records with an invalid code for province issuing health card number

3. Records with an invalid admission date

4. Cadaveric donor or stillbirth records (Admission Category Code = R or S)

5. AMI admissions within 28 days after the admission date of a previous AMI hospitalization


<div role="button" class="expandableTitle" aria-controls="backgroundRegion">Background, Interpretation and Benchmarks</div>
Rationale

AMI is one of the leading causes of morbidity and death. Measuring its occurrence in the population is important for planning and evaluating preventive strategies, allocating health resources and estimating costs. From a disease surveillance perspective, there are three groups of AMI events: non-diagnosed events, fatal events occurring outside the hospital and events admitted to acute care hospitals. Although AMIs admitted to a hospital do not reflect all AMIs in the community, this information provides a useful and timely estimate of the disease occurrence in the population.

Interpretation

Lower rates are desirable.

HSP Framework Dimension

Health System Outcomes: Improve health status of Canadians

Areas of Need

Not applicable

Targets/Benchmarks

Not applicable

References

Heart and Stroke Foundation of Canada. The Growing Burden of Heart Disease and Stroke in Canada 2003. Available at http://publications.gc.ca/collections/Collection/H1-10-2003E.pdf. Accessed March 01, 2014.

Manuel DG, Lim JJY, Tanuseputro P, et al. How many people have had a myocardial infarction? Prevalence estimated using historical hospital data. BMC Public Health. 2007; 7:174.


<div role="button" class="expandableTitle" aria-controls="availabilityRegion">Availability of Data Sources and Results</div>
Data Sources

DAD, HMDB

Available Data Years

Type of Year:
Fiscal
First Available Year:
2010
Last Available Year:
2015

Geographic Coverage

All provinces/territories

Reporting Level/Disaggregation

National, Province/Territory, Region


<div role="button" class="expandableTitle" aria-controls="resultRegion">Result Updates</div>
Update Frequency

Every year

Indicator Results

Web Tool:
Your Health System: In Depth
URL:
Accessing Indicator Results on Your Health System: In Depth

Updates

Not applicable


<div role="button" class="expandableTitle" aria-controls="qualityRegion">Quality Statement</div>
Caveats and Limitations

Not applicable

Trending Issues

Not applicable

Comments

This indicator includes all new hospitalized AMI events in the reference period, encompassing first-ever and recurrent AMIs. A person may have more than one AMI event in the reference period. AMI events not admitted to an acute care hospital and in-hospital AMIs are not included in this indicator.

Myocardial infarction is labelled as acute with a stated duration of four weeks (28 days) or less in ICD-10-CA and eight weeks or less in ICD-9/9-CM. Therefore, a 28-day period to define a new AMI event is applicable to the records coded in ICD-10-CA only.

Indicator results are also available on

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