The primary suspect is the lung. Lung causes include COPD, emphysema, asthma, pulmonary edema restrictive disease, pulmonary embolism, fibrosis, infection and other rarer causes. Many systemic illnesses such as lupus, liver or kidney failure and infections can cause shortness of breath. A good internist should be able to help you sort through the various potential causes and prescribe therapy. I hope you find this information useful.
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Only your physician can provide specific diagnoses and therapies. Please feel free to write back with additional questions. The Heart Center website contains a directory of the cardiology staff that can be used to select the physician best suited to address your cardiac problem. Information contained within this forum is intended solely for general educational purposes and is not intended nor implied to be a substitute for professional medical advice relative to your specific medical condition or question. Only your physician can provide specific diagnoses and therapies.