Diagnosis in Childhood vs. Adulthood
Many congenital heart defects are diagnosed in infancy or childhood through newborn pulse oximetry screening, detection of a heart murmur, fetal echocardiography during pregnancy, or symptoms such as cyanosis and poor feeding in newborns. However, a significant subset of congenital heart defects — including bicuspid aortic valve, secundum atrial septal defects, congenitally corrected transposition, and some mild pulmonary valve abnormalities — go unrecognized until adulthood. The first clue may be an unexplained murmur found on a routine physical exam, an abnormal ECG during a pre-employment screen or sports physical, new-onset atrial fibrillation in a young adult, or a finding on an echocardiogram or CT scan performed for another reason.
How the Diagnosis Is Confirmed
When a congenital heart defect is suspected in adulthood, echocardiography (cardiac ultrasound) is typically the first-line imaging study and can define anatomy, valve function, chamber sizes, and intracardiac pressures. Cardiac MRI is increasingly used for detailed assessment of ventricular volumes, great vessel anatomy, conduit patency, and myocardial tissue characterization — particularly when echocardiographic windows are limited or when quantification of ventricular function is critical to management decisions. CT angiography provides high-resolution images of complex vascular anatomy and is especially useful before re-operative surgery. An ACHD-trained cardiologist with experience in adult congenital anatomy is essential for correctly interpreting these studies and integrating the findings into a coherent care plan.
Reviewed by Dr. Pradeepkumar Charla, MD, MBA, FAAP, FACC
Pediatric & Adult Congenital Cardiologist — Congenital Heart Compass Medical PLLC
Last reviewed:
Medical disclaimer: This content is for educational purposes only and is not a substitute for individualized medical advice, diagnosis, or treatment. Always consult a qualified cardiologist for decisions about your congenital heart disease care.