Foetal right ventricular outpouching associated with ventricular bigeminy

Introduction Congenital cardiac right ventricular diverticula are transmural localised protrusions, within the free wall of the ventricles. These diverticula are infrequently diagnosed during the foetal period, and because of their rarity, their natural history remains unclear. We present a case of a prenatal diagnosis of right ventricular diverticulum at 26 weeks gestation associated with an irregular rhythm of ventricular bigeminy. Case report We present a case of a 32-yearold G1P1, who was referred at 26 weeks gestation on account of an abnormal rhythm and four-chamber view on a routine screening. Foetal echocardiography showed a large right ventricular outpouching (RVO) of 11 × 9 mm, with unrestricted flow, across a large orifice and situated along the lateral free wall, just beneath the tricuspid valve. Conclusion Foetal RVO are rare congenital malformations that need to be considered, when an extra chamber is visualised in the routine four-chamber view, in the assessment of foetal arrhythmia or presence of a pericardial effusion.