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Abnormal Microscopic Findings in the Placenta Correlate With the Severity of Fetal Heart Failure.
BACKGROUND: This study investigated the association between placental pathology and fetal heart failure.Methods and Results: Singletons with a congenital heart defect (CHD) and/or arrhythmia (n=168) and gestational age-matched controls (n=52) were included in the study. The associations between macro- and microscopic abnormal findings of the placenta and the severity of fetal heart failure were evaluated using the cardiovascular profile (CVP) score. Nine features were microscopically identified and assessed in sections of the placenta: premature villi, edematous villi, fibrotic villi, chorioamnionitis, chorangiosis, fibrin deposition, subchorionic hematoma, infarcted villi, and nucleated red blood cells in villous vessels. Among singletons with CHD and/or arrhythmia, the final CVP score was ≥8 in 140 cases, 6 or 7 in 15 cases, and ≤5 in 13 cases. Microscopic analysis showed that the frequency and severity of premature and edematous villi and increased nucleated red blood cells in villous vessels were greater in cases of fetal heart failure. These microscopic findings were more common and severe in cases with a final CVP score ≤5 than in gestational age-matched controls. The prevalence of abnormal macroscopic findings of the placenta and umbilical cord was similar regardless of the severity of fetal heart failure.
CONCLUSIONS: Premature and edematous villi and increased nucleated red blood cells in villous vessels were correlated with the severity of fetal heart failure in cases of CHD and/or arrhythmia.
CONCLUSIONS: Premature and edematous villi and increased nucleated red blood cells in villous vessels were correlated with the severity of fetal heart failure in cases of CHD and/or arrhythmia.
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