Complex congenital cardiac anomalies in an infant with Multi-system disorders presenting in Heart failure; A case report

Background: Congenital anomalies are rare but can be extremely complex, presenting significant challenges for both diagnosis and treatment, especially in developing countries like Nigeria. These conditions often require precise imaging and a personalized approach to care. Case Presentation: We present the case of a 10-month-old infant with a rare combination of left atrial isomerism with a single atrium, complete atrioventricular septal defect (AVSD), and severe pulmonary stenosis, who presented with features of cardiac failure. Imaging played a crucial role in identifying the anomalies, guiding diagnosis, and informing management strategies. Despite financial constraints limiting surgical intervention, the patient continues to be managed with an anti-failure regimen. Conclusions: Advanced imaging and a multidisciplinary approach are critical in managing congenital heart defects. This case highlights the importance of early detection and thorough evaluation, even in resource-limited settings, to optimize patient outcomes.