anomaly

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In addition to large P waves and atypical right bundle branch block, common electrocardiographic features of Ebstein's anomaly include a long P-R interval, inferior or anterior Q waves, and the Wolff-Parkinson-White pattern of ventricular preexcitation via a right-sided accessory pathway.
05% risk of Ebstein's anomaly, a modest teratogenic effect.
05% risk of Ebstein's anomaly with lithium to an approximately 8% risk of cardiovascular malformations and neural tube defects with sodium valproate.
Many of us learned in medical school that lithium is a known teratogen and should not be used in pregnancy but we now know that its teratogenicity is relatively modest: The risk of Ebstein's anomaly is about 0.
When a standard four-chamber view and outflow views with color flow Doppler imaging on all fetuses were used, anomalies that were consistently identified included hypoplastic left and right heart, single ventricle, tetralogy of Fallot, transposition of the great arteries, and Ebstein's anomaly.
However, the absolute risk of Ebstein's anomaly is estimated at 0.