This case report provides the first documentation of Wenckebach type block progressing to complete heart block in a fetus with left isomerism using Doppler echocardiography.
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May warrant closer fetal monitoring in left isomerism; leaves open whether early intervention prevents hydrops.
We report a fetus with left isomerism, in whom the atrioventricular block progressed from low grade second degree to complete block and fetal hydrops. While it is known that there is a high incidence of heart block in the fetus with left isomerism, as far as we are aware, ours is the first report of Wenckebach type block documented in the fetus by Doppler echocardiography, and demonstration of the progression of heart block during fetus life in the setting of left isomerism.
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Swaminathan et al. (2007) studied this question.
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