Hello, Thank you for your query at DoctorSpring.com I have gone through case file , it was very interesting. You have been leading a very active life and following your passion. Yes definitely , dancing in conditions having heavy smoke is definitely not good for health in long term. But going through investigations your health looks perfectly in good condition. I would suggest you to PFT ( pulmonary function test ) to see the present condition of the lung and whether it had been effected by heavy smoke. At this age of 71 , I would suggest look in to the future , what you want ? Follow your passion or look to achieve you goal of living up to 110 yrs . As a cardiologist I would suggest , if you want to live a healthy life try to avoid dancing in heavy smoke. Echocardiogram and Tread mill is suggested to assess the condition of the Heart . Regards Dr Satish |