Risk Factors and Timing of Acute Myocardial Infarction Associated With Pregnancy: Insights From the National...

Area of Science:

• Cardiology
• Obstetrics
• Public Health

Background:

• Pregnancy is a known risk factor for acute myocardial infarction (AMI).
• Understanding the timing and predictors of AMI during pregnancy is essential for improving maternal outcomes.
• The prevalence of AMI in pregnancy has shown a concerning increase.

Purpose of the Study:

• To investigate the temporal patterns of AMI in pregnant women.
• To identify key risk factors associated with AMI during pregnancy, labor, delivery, and postpartum.
• To examine factors contributing to poor cardiovascular and cerebrovascular outcomes following AMI in this population.

Main Methods:

• Utilized the National Inpatient Sample database from 2003-2015.
• Analyzed over 11 million inpatient records, identifying 913 cases of AMI.
• Employed statistical analysis to determine odds ratios for various risk factors and adverse events.

Main Results:

• AMI occurred most frequently in the postpartum period (50.8%), followed by pregnancy (37.0%) and labor/delivery (12.2%).
• Significant predictors of AMI included pre-existing coronary artery disease, heart failure, prior valve replacement, and atrial fibrillation.
• Gestational hypertensive disorders (preeclampsia, eclampsia) and traditional atherosclerosis risk factors were strongly associated with AMI.
• Major adverse cardiovascular and cerebrovascular events were more common postpartum (63.5%), with pre-eclampsia being a significant risk factor.

Conclusions:

• Acute myocardial infarction in pregnancy is linked to a combination of modifiable, nonmodifiable, and obstetric risk factors.
• These risk factors contribute to severe adverse outcomes, emphasizing the need for targeted interventions.
• Public health initiatives focused on risk factor modification are vital to decrease AMI incidence and improve maternal health during pregnancy.