JOURNAL ARTICLE
MULTICENTER STUDY
RESEARCH SUPPORT, NON-U.S. GOV'T
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Cardiovascular magnetic resonance imaging predictors of pregnancy outcomes in women with coarctation of the aorta.

AIMS: The aim of this study was to determine associations between aortic morphometry evaluated by cardiovascular magnetic resonance (CMR) and pregnancy outcomes in women with aortic coarctation (CoA).

METHODS: Consecutive women with CoA seen with CMR within 2 years of delivery were reviewed. Aortic dimensions were measured on CMR angiography. Adverse outcomes (cardiovascular, obstetric, and foetal/neonatal) were documented.

RESULTS: We identified 28 women (4 with native and 24 with repaired CoA) who had 30 pregnancies. There were 29 live births (1 stillbirth) at mean gestation 38 ± 2 weeks. Mean maternal ages at first cardiac intervention and pregnancy were 6 ± 8 and 29 ± 6 years, respectively. There were nine cardiovascular events (hypertensive complications in five; stroke in two and arrhythmia in two) occurring in seven pregnancies. Minimum aortic dimensions were smaller in women with cardiovascular events (12.1 vs. 14.3 mm, P = 0.001), specifically in those with hypertensive complications (11.6 vs. 14.4 mm, P < 0.001). From receiver operator curve analysis, optimal discrimination for the development of adverse cardiovascular events occurred at the 12 mm diameter threshold [sensitivity 78%, specificity 91%, area under the curve 0.86 (95% CI: 0.685-1)]. All hypertensive events occurred in conjunction with a minimum aortic diameter of 12 mm (7mm/m(2)) or less. No adverse outcomes occurred if minimum diameter exceeded 15 mm.

CONCLUSION: Smaller aortic dimensions relate to increased risk of hypertensive events in pregnant women with CoA. CMR can aid in stratification of risk for women with CoA who are considering pregnancy.

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