Myocardial infarction

A heart attack is caused by a blockage in a coronary artery that supplies the heart with blood and, consequently, oxygen. This deprivation leads to heart failure and eventually cardiac arrest.

Data

The surveillance system for ischemic heart disease, particularly myocardial infarctions, established by Santé publique France makes it possible to study the epidemiological trends of these conditions:

  • Data from the registries

The rates are expressed per 100,000 inhabitants.

Hospitalizations

(New cases and recurrences)

ST-segment elevation myocardial infarction (STEMI)

Year 2015

Men

Women

Bas-Rhin

Crude incidence rates (n)

 

 

35–44 years

58.2 (43)

5.4 (4)

45–54 years

131.7 (104)

32.7 (26)

55–64

188.5 (131)

49.8 (36)

65–74

242.3 (106)

71.2 (34)

Rates standardized to the European population aged 35–74 (n)

149.3 (384)

37.7 (100)

Haute-Garonne

Crude incidence rates (n)

 

 

35–44 years

52.4 (48)

3.3 (3)

45–54 years

93.3 (82)

16.7 (15)

55–64

178.8 (126)

29.0 (22)

65–74

203.9 (100)

54.5 (31)

Rates standardized to the European population aged 35–74 (n)

118.5 (356)

21.3 (71)

Lille Urban Community

Crude incidence rates (n)

 

 

35–44 years

50.0 (37)

16.1 (12)

45–54 years

140.1 (94)

25.3 (18)

55–64

170.9 (96)

35.8 (23)

65–74 years

265.0 (92)

61.6 (26)

Rates standardized to the European population aged 35–74 (n)

149.7 (319)

33.1 (79)

*Heart attack, ACS, unstable angina, or other coronary events. Rates are expressed per 100,000 inhabitants.

Hospitalized and non-hospitalized events

(New cases and recurrences)

Acute coronary syndrome* and probable coronary deaths

Year 2015

Men

Women

Bas-Rhin

Crude incidence rates (n)

 

 

35–44 years

73.1 (54)

10.7 (8)

45–54 years

188.7 (149)

57.9 (46)

55–64

332.5 (231)

81.7 (59)

65–74

585.1 (256)

207.2 (99)

Rates standardized to the European population aged 35–74 (n)

528.2 (690)

158.3 (212)

Haute-Garonne

Crude incidence rates (n)

 

 

35–44 years

96.1 (88)

13.2 (12)

45–54 years

260.6 (229)

70.0 (63)

55–64

532.1 (375)

104.2 (79)

65–74

793.2 (389)

241.0 (137)

Rates standardized to the European population aged 35–74 (n)

356.9 (1,081)

86.6 (291)

Lille Urban Community

Crude incidence rates (n)

 

 

35–44 years

110.9 (82)

34.8 (26)

45–54

339.7 (228)

99.8 (71)

55–64 years

657.0 (369)

221.1 (142)

65–74

1,183.7 (411)

376.6 (159)

Rates standardized to the European population aged 35–74 (n)

534.5 (1,090)

170.7 (398)

Mortality from ischemic heart disease, acute coronary syndrome, and myocardial infarction: variations by age and sex

Data collected from death certificates show that myocardial infarctions accounted for 45% of deaths from ischemic heart disease and acute coronary syndromes for 51%. Crude mortality rates increased significantly with age. After adjusting for age, men had a mortality rate from ischemic heart disease more than twice that of women (77.2 vs. 31.8 per 100,000 in 2013). This finding was also observed for deaths from acute coronary syndrome and myocardial infarction.

Declining Mortality from Ischemic Heart Disease

Between 2000 and 2013, the age-standardized mortality rate from ischemic heart disease decreased by 44% among men and by 49% among women, across all age groups. Among those under 65, the mortality rate decreased more significantly among men than among women (-42% vs. -26%). This overall reduction in coronary mortality is due in part to the reduced incidence of acute coronary events and in part to the reduced 28-day mortality rate following such events. These trends are attributed to combined improvements in primary prevention—both individual and population-based—in the management of coronary patients, as well as in secondary prevention treatments prescribed following a first myocardial infarction.

Trends in death rates* per 100,000 population by age and sex from 2000 to 2013

Evolution des taux de décès par CPI, selon l’âge et le sexe, 2000-2013
* Rates per 100,000 inhabitants, age-standardized to the 2010 European reference population (Eurostat 2013). Scope: All of France.

A higher hospitalization rate among men than among women

In 2014, 221,108 patients residing in France had at least one full hospitalization for ischemic heart disease (including first-time events and recurrences), of whom 119,015 were hospitalized for acute coronary syndrome—including 62,251 for myocardial infarction. Hospitalization rates were three times higher among men than among women for ischemic heart disease, acute coronary syndrome, or myocardial infarction.

TABLE

Number and rate of patients hospitalized in acute care for CPI and IDM, by sex and age, in 2014

An increase in the rates of women under 65 hospitalized for myocardial infarction

An analysis of overall trends between 2002 and 2014 in the standardized rates of patients hospitalized for ischemic heart disease, acute coronary syndrome, and myocardial infarction shows a downward trend (–13%, –20%, and –17%, respectively). However, these overall trends mask different patterns depending on sex and age. Among those under 65, the standardized rate of patients hospitalized for ischemic heart disease decreased more significantly among men (-15.6%) than among women (-4.8%). Regarding myocardial infarctions, the standardized rate among those under 65 remained virtually stable in the male population (-1.4%), while it rose sharply for women (+26%).

Trends in the rates* of hospitalized patients with a primary diagnosis of ischemic heart disease by age and sex from 2002 to 2014

Evolution des taux de patients hospitalisés avec diagnostic principal de cardiopathies ischémiques, selon l’âge et le sexe, 2002-2014
Rates per 100,000, age-standardized to the 2010 European reference population (Eurostat 2013). Scope: All of France. Sources: National PMSI database (ATIH), demographic statistics: INSEE

Improvements in Follow-up Care and Rehabilitation Following a Myocardial Infarction

Following a myocardial infarction in the first half of 2014, slightly more than one-third (36.9%) of patients were hospitalized for follow-up care and rehabilitation within the year (N = 8,380): 28.5% for cardiac rehabilitation and 8.5% for “other” care purposes. Furthermore, the proportion of patients in cardiac rehabilitation was lower for women than for men, with age-standardized rates of 24.9% and 29.6%, respectively.

Between 2010 and 2014, the rate of cardiac rehabilitation increased by an average of 5.0% per year among men and 6.6% per year among women.
Furthermore, the proportion of inpatient admissions for cardiac rehabilitation decreased in favor of outpatient care (p<0.0001).

Significant regional disparities

Analysis of regional standardized rates reveals significant disparities in mortality and hospitalization rates due to ischemic heart disease across France.

  • Mortality rates due to ischemic heart disease:

    • The Normandy, Brittany, and Hauts-de-France regions exceeded the national average by more than 20%

    • Réunion had the highest rate in France

    • The regions of Île-de-France, Provence-Alpes-Côte d’Azur, and the three other overseas regions (Martinique, Guadeloupe, and French Guiana) had rates more than 10% lower than the national rate.

  • Rate of patients hospitalized for ischemic heart disease:

    • Corsica, Provence-Alpes-Côte d’Azur, and Grand-Est exceeded the national average by more than 10%.

    • Martinique, Guadeloupe, and Brittany had the lowest rates.

The differences in hospitalization rates observed from one region to another could be due to differences in the prevalence of risk factors (primarily smoking, high cholesterol, diabetes, high blood pressure, physical inactivity, obesity, and socioeconomic disadvantage).