Conversation: The conversation between human and AI assistant.
[|Human|] Hi, I recently saw a pulmonologist following 2 episodes of allergic reaction followed by cough induced asthma. My PFT was normal except for a low DLOC of 15.6. I still have some dyspnea on exertion, like stairs. I also feel tired sleep more than usual. I m 75 yrs old. I had a normal chest X-ray And Cat scan of my lungs. Could this be a cardiovascular problem? Thank you. Betty
[|AI|]  Thanks for your question on Chat Doctor. I can understand your concern. Yes, cardiac diseases can cause breathlessness on exertion. Your extensive pulmonary work up (chest x-ray, CT scan and PFT) are normal. So no need to worry about lung diseases. Get done blood pressure monitoring, ECG, 2d echo and stress test (trade mill test). Yoi may need cardiac supportive Chat Doctor. Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.