Accessory tricuspid valve (ATV) is a rare cardiac anomaly often associated with other complex cardiac disorders, most commonly tetralogy of Fallot (TOF) and ventricular septal defect (VSD), but it can also be an isolated entity. It is usually diagnosed in childhood. It can be asymptomatic and get diagnosed incidentally, but it can also lead to cardiac complications such as right ventricular outflow obstruction (RVOTO) or tricuspid valve regurgitation.
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