I am not a doctor, but all the doctors who have looked at my EKG printouts (at least three in the last year) say my heart is fine. But my lungs are a different story. The doctor who is our landlord stopped by last weekend to check on some repairs to our unit and said I should be on oxygen. My new/old primary care doc says they need to run further tests to determine whether it is episodic asthma, chronic bronchitis, or emphysema in order to supply the proper treatment. They have ruled out cancer and infections (tuberculosis, influenza, etc) based on blood chemistry and x-rays, although I am on a short course of antibiotics just to be sure.
And the silver lining of the cloud is that I have lost about 30 pounds since last August.