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Assessment of atrioventricular conduction by echocardiography and magnetocardiography in normal and anti‐Ro/SSA‐antibody‐positive pregnancies

The objectives of this study were, first, to evaluate the association between fetal echocardiographic atrioventricular (AV) and magnetocardiographic (fMCG) PR intervals at different gestational ages (GAs) in normal and anti‐Ro/SSA‐antibody‐positive pregnancies; second, to determine if PR interval could be predicted by AV interval; and third, to assess the neonatal outcome of fetuses with prolonged AV and PR intervals, with the goal of developing criteria for fetal first‐degree AV block (AVB‐I).