Atrial septal defect (ASD) - Symptoms and causes - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/atrial-septal-defect/symptoms-causes/syc-20369715
WEBJan 23, 2024 · Symptoms. A baby born with an atrial septal defect (ASD) may not have symptoms. Symptoms may begin in adulthood. Atrial septal defect symptoms may include: Shortness of breath, especially when exercising. Tiredness, especially with activity. Swelling of the legs, feet or belly area. Irregular heartbeats, also called arrhythmias.
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