C4. Maternal cardiac changes during uncomplicated twin pregnancy: does the chorionicity matter?

AbstractObjectives: To assess longitudinally the echocardiographic findings in a cohort of women carrying an uncomplicated monochorionic (MC) twin pregnancy and compare them with those obtained from dichorionic (DC) twin gestations.Methods: Healthy women with MC twin pregnancies were submitted to serial transthoracic maternal echocardiography during the first, second and third trimester. Cases with severe obstetric complications after enrollment were eventually excluded. The cardiac findings obtained at different time frames within the MC group were compared. Moreover, these data were compared with those obtained longitudinally in a cohort of uncomplicated DC twin pregnancies.Results: From 2012 to 2016, 19 women with an uncomplicated MC twin pregnancy were included in this study group. Among this group no significant changes were documented from 1st to 3rd trimester with the exception of an ejection fraction decrease. In respect of 48 DC uneventful twin gestations in the MC set the following significant d...