Abstract 18686: Serial Two Dimensional Echocardiographic Observations and Measurements Obtained by Fetal Echocardiograms: Correlation With Gestational Age
Objective: The purpose of the study was to establish changes that may occur between 20 and 34 weeks of pregnancy in linear measurements of the cardiac chambers, great vessels, aortic isthmus, descending aorta and foramen ovale by fetal echocardiography (FE). Regression analysis was utilized to determine any possible correlation between the linear measurements and gestational age.
Methods: Serial FEs were obtained on 2573 normal single pregnancies with accurate gestational ages. FEs obtained using ASE guidelines were divided into 15 groups according to gestational age.
Results: Measurements of thoracic diameter, total cardiac diameter, left atrial (LA) and right atrial (RA) diameters, left ventricular (LV) and right ventricular (RV) diameters, and aortic and pulmonary artery diameters significantly increased between 22 and 28 weeks (p < 0.01). Aortic arch isthmus (AoAI), descending Ao diameter, left and right pulmonary artery (PA) diameters and foramen ovale diameter did not change significantly. Between 20 and 34 weeks of pregnancy, RA and RV diameters were always greater than LA and LV diameters, the PA diameter was always greater than Ao diameter, and the AoAI diameter was always greater than the ductal artery (p < 0.01). The ductal artery diameter was always greater than left and right PA Regression analysis between FE dimensions and gestational age showed a significant progressive increase in thoracic and total cardiac diameters, LA and RA diameters, LV and RV diameters, AoAI and descending Ao diameters and ductal artery diameter.
Conclusion: FE can accurately assess cardiac structure and is capable of establishing normal reference values of cardiac and great vessel anatomy. As expected, most measurements statistically increase with increasing gestational age.
- © 2013 by American Heart Association, Inc.