Cardiology Questions Answered by Verified Cardiologists.
Thank you for your question, if your ECG, chest X rays and blood test for cardiac enzymes are normal then you do not need to worry, other causes of such symptoms are anxiety, lung disease including infections and asthma.
Let me know if you have questions, Thank you.
I would recommend an echocardiogram as well.
that will help rule out cardiac issues
Indication of Echocardiogram comes when you have done the basic tests that are abnormal or clinical finding of murmur or abnormal heart sound.