Aortic Dissection During Pregnancy and Puerperium: Contemporary Incidence and Outcomes in the United States.

Background Aortic dissection (AD) during pregnancy and puerperium is a rare catastrophe with devastating consequences for both parent and fetus. Population-level incidence trends and outcomes remain relatively undetermined. Methods and Results We queried a US population-based health care database, the National Inpatient Sample, and identified all patients with a pregnancy-related AD hospitalization from 2002 to 2017. In total, 472 pregnancy-related AD hospitalizations (mean age, 30.9±0.6 years) were identified from 68 514 000 pregnancy-related hospitalizations (0.69 per 100 000 pregnancy-related hospitalizations), with 107 (22.7%) being type A and 365 (77.3%) being type B. The incidence of AD appeared to increase over the 16-year study period but was not statistically significant (P for trend >0.05). Marfan syndrome, primary hypertension, and preeclampsia/eclampsia were found in 21.9%, 14.4%, and 11.5%, respectively. On multivariable logistic regression analysis, Marfan syndrome was associated with the highest risk of developing AD during pregnancy and puerperium (adjusted odds ratio, 3469.36 [95% CI, 1767.84-6831.75]; P<0.001). The in-hospital mortalities of AD, type A AD, and type B AD were 7.3%, 4.3%, and 8.1%, respectively. Length of hospital stay for the AD, type A AD, and type B AD groups were 7.7±0.8, 10.4±1.9, and 6.9±0.9 days, respectively. Conclusions We quantified population-level incidence and in-hospital mortality in the United States and observed an increase in the incidence of pregnancy-related AD. In contrast, its in-hospital mortality appears lower than that of non-pregnancy-related AD.