ABSTRACT Congenital heart defects (CHD) remain one of the most common categories of birth defects worldwide. In many developing countries, high early childhood mortality and limited diagnostic facilities often obscure the true scope of the problem. In this review, we provide an overview of the clinical epidemiology and management of CHD in a developing country: Nigeria, Africa's most populous country. We describe the types of CHD and the clinical presentation, echocardiographic diagnosis, man...