Background:
Sex disparities exist in acute cardiovascular care. Despite sex-specific cardiac arrest (CA) research being identified as a priority by professional societies, there are limited studies on this topic.
Objectives:
To assess sex disparities in management and outcomes of CA complicating acute myocardial infarction (AMI) in a contemporary United States population.
Methods:
Adult admissions with a primary diagnosis of AMI and concomitant diagnosis of CA were identified using the National Inpatient Sample. Outcomes of interest included sex disparities in in-hospital mortality, coronary angiography (CAG), percutaneous coronary intervention (PCI) and mechanical circulatory support (MCS) use.
Results:
Between January 1, 2000 and December 31, 2017, 11,622,528 admissions for AMI were identified, of which 584,216 (5.0%) were complicated by CA. Men had higher prevalence of CA compared to women (5.4% vs 4.4%,
p<
0.001) in both STEMI and NSTEMI (2017 vs 2000, STEMI-men: 12.3% vs 7.8%, STEMI-women: 10.4% vs 7.5%, NSTEMI-men: 3.1% vs 2.7%, NSTEMI-women: 2.4% vs 2.5%). Women with AMI-CA were on average older (70.4 vs 65.0, p<0.001), of black race (12.6% vs 7.9%, p<0.001) and had higher comorbidity. Women were more likely to present with NSTEMI (36.4% vs 32.3%, p<0.001) and a non-shockable rhythm (47.6% vs 33.3%, p<0.001). Women less frequently received CAG (56.0% vs 66.2 %), early CAG (32.0% vs 40.2%), PCI (40.4% vs 49.7%), MCS (17.6% vs 22.0%), and CABG (all p<0.001). Women had significantly higher unadjusted in-hospital mortality (52.6% vs 40.6%, p
<
0.001). In a multivariable logistic regression analysis, female sex was associated with higher in-hospital mortality (OR 1.13 [95% CI 1.11-1.14];
p<
0.001). When stratified by type of rhythm, type of AMI, presence of cardiogenic shock and location of CA, women consistently received less frequent CAG and experienced higher in-hospital mortality.
Conclusion:
In the largest 18-year study evaluating management and outcomes of CA in AMI, we identified the presence of significant sex disparities. Women with AMI-CA were older, with higher rates of non-shockable rhythm, were less likely to undergo therapeutic procedures including CAG, PCI, and MCS. Women had higher unadjusted and adjusted in-hospital mortality.
Hospitalization Costs for Acute Myocardial Infarction Patients Treated With Percutaneous Coronary Intervention in the United States Are Substantially Higher Than Medicare Payments
