Interventional Management of a Rare Case of Complex Congenital Heart Disease in an Adult Patient: A Case Report.

Congenital heart disease (CHD), which accounts for about one-third of all congenital defects and affects approximately 1% of all live births worldwide, has maintained a stable incidence rate while experiencing a decrease in mortality rates since 1990. Despite advancements in fetal cardiac ultrasound examinations and routine pulse oximetry screening of newborns, a significant proportion of CHD patients may still be undiagnosed until adulthood. This oversight can lead to considerable morbidity and mortality due to physical limitations and reduced quality of life. In this case report, we describe a 29-year-old woman who was initially misdiagnosed as having an inoperable case of CHD and was referred to our center with symptoms of palpitations and exertional dyspnea. During her evaluation, she was diagnosed with severe pulmonary hypertension associated with patent ductus arteriosus (PDA), pre-ductal aortic coarctation, ventricular septal defect (VSD), and bicuspid aortic valve, all of which had been overlooked since infancy. Following initial medical treatment for pulmonary hypertension, a simultaneous transcatheter approach was employed, during which the PDA was closed using an occluder device, and the coarctation was repaired concurrently with a self-expanding stent. Eight months later, her VSD was successfully closed using a muscular VSD occluder device through an interventional technique. This case underscores the importance of adult CHD fellowship training, which enables cardiologists specializing in this field to accurately diagnose and treat complex cases of CHD that may have been missed during infancy and early childhood. This timely intervention ultimately led to the complete relief of her symptoms and prevented progression to Eisenmenger syndrome.