May 4, 2010

Ultrasonographic diagnosis of delayed atrioventricular conduction during fetal life: a reliability study

American Journal of Obstetrics and Gynecology
Yvan MivelazJean-Claude Fouron

Abstract

The objective of the study was to evaluate the reliability of the 2 most commonly used ultrasonographic approaches for monitoring fetal atrioventricular conduction time (AVCT): (1) superior vena cava/ascending aorta (SVC/AA), and (2) left ventricular inflow/outflow tract (LVI/O) Doppler recordings. Echographic studies from fetuses followed up for first-degree atrioventricular block (AVB-1) between 1998 and 2008 were reviewed. The ability to identify atrial contractions in the same fetuses by the SVC/AA and LVI/O approaches was analyzed. Sixty-six studies of 13 fetuses with AVB-1 were available. Atrial contractions were visible in all SVC/AA studies. With the LVI/O approach, atrial contractions could not be identified in 26 studies (39%). AVCT delay was significantly greater in the nonidentifiable compared with the identifiable atrial contraction group (P < .001). Differences in heart rate and gestational age were not significant. The LVI/O is unsuitable for prenatal screening of conduction system anomalies.

  • References29
  • Citations4

Citations

Mentioned in this Paper

Atrioventricular Septal Defect
Myocardial Contraction
Biochemical Pathway
Embryopathies
Entire Fetus
TRIM21 gene
Bradycardia
Left Ventricular Structure
Uterus
Superior Vena Cava Structure

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