Peripheral atherosclerosis in patients with myocardial infarction

Area of Science:

• Cardiology
• Vascular Medicine
• Public Health

Background:

• Myocardial infarction (MI) is a leading cause of death globally.
• The role of generalized atherosclerosis in the etiology of MI is debated.
• Assessing peripheral arterial disease can offer insights into systemic atherosclerosis.

Purpose of the Study:

• To investigate the prevalence of generalized atherosclerosis in patients with myocardial infarction.
• To evaluate the association between arterial insufficiency and mortality in MI patients.
• To explore the etiological factors contributing to myocardial infarction.

Main Methods:

• Systolic blood pressure gradient between arm and big toe (brachial-to-pedal pulse wave velocity) was measured in 260 MI patients.
• Prevalence of arterial insufficiency was determined based on the pressure gradient.
• Patient mortality was tracked over a 2-year and longer follow-up period (56-82 months).

Main Results:

• Arterial insufficiency was detected in 12% of men and 17% of women with MI.
• Two-year mortality was significantly higher in male MI patients with arterial insufficiency (19%) compared to those without (6%).
• This mortality difference persisted and increased with longer follow-up.

Conclusions:

• Generalized atherosclerosis is present in a minority of myocardial infarction patients, not the majority.
• Arterial insufficiency is a significant risk factor for increased mortality post-MI.
• The findings suggest that mechanisms beyond generalized atherosclerosis play a critical role in the development of myocardial infarction.