Thank you for your medical query at AskTheDoctor.com
I can understand your concern.
Right atrial abnormality signifies an enlargement of the right side of the heart. This could be due to asthma COPD or any other cause of pulmonary arterial hypertension. There could also be an error in reporting.
I will suggest a 2D ECHO and lung function tests for conclusive diagnosis.
Hope this was helpful,
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