[Acute myocardial infarction. Different treatment, different prognosis?]

Area of Science:

• Cardiology
• Epidemiology
• Public Health

Context:

• Hospitalized patients with acute myocardial infarction (MI) between 1970-1975 (G1, n=731) and 1984-1986 (G2, n=729) were compared.
• Patient demographics and risk factors (age, sex, tobacco, dyslipidemia, hypertension, diabetes, heredity) were similar between the two groups.
• Treatment modalities showed some changes, with steroids and electro-systolic stimulation decreasing, while diuretic use remained consistent.

Purpose:

• To investigate the reasons behind the observed decrease in in-hospital mortality for myocardial infarction.
• To determine if changes in treatment protocols or other factors contributed to improved patient outcomes.
• To analyze trends in specific complications like rhythm disorders and atrio-ventricular blocks.

Summary:

• In-hospital mortality for myocardial infarction decreased by 38% from 19.2% in G1 to 11.9% in G2 over a ten-year period.
• This mortality reduction was significant across most demographics, with notable exceptions in women under 65 and men over 65.
• While certain treatments like steroids and electro-systolic stimulation were reduced, the overall impact on mortality reduction remains unclear and likely multifactorial.

Impact:

• Highlights the need to consider factors beyond direct medical interventions when assessing improvements in acute myocardial infarction care.
• Suggests that changes in patient management or unmeasured variables may play a crucial role in reducing mortality.
• Provides valuable data for understanding long-term trends in cardiovascular disease outcomes and informing future public health strategies.