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Does the trace of the ductus venosus improve the diagnosis of complete congenital heart block in fetuses compared to M-mode or spectral Doppler?
Evaluating the varying morphology of the 'a' wave in the ductus venosus trace offers a novel method for diagnosing complete congenital heart block antenatally.
Abstract Complete congenital heart block (CCHB) is a very rare cardiac condition. It is usually diagnosed between 20 and 24 weeks of gestation. But diagnosing this condition is difficult in the antenatal period. To overcome the difficulties of diagnosing using M-mode or spectral Doppler, we propose a novel method for easy diagnosis of CCHB. This is done by using the trace of the ductus venosus. The “a” wave in the ductus venosus trace shows pressure in the ventricle. In CCHB, due to varying pressure in the ventricle, we get varying morphology of the “a” wave.
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