<s>[INST] Hello, I have had a heart problem and always suffered breathing problems. I now have a stent in my heart vien and after several months am still having breathing and feel sometimes I am going to just fall over and be dead.I only like have to exert myself for like a breif moment and I feel I have to use that nitro stuff and my ventolin inhaler asap or drop. I have always got a bad pain in between my shoulders and neck. it worsens when I do little and in the cold.but if I get hot I just get all faint and dizzy.yes i di smoke and i was a heavy smoker, bu6t am regular at 8 a day now [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Since you are a active smoker, we should rule out lung diseases like bronchitis first. So consult pulmonologist and get done 1. Clinical examination of respiratory system 2. PUT (pulmonary function test). PFT will not only diagnose bronchitis, but it will also tell you about severity of the disease. And treatment is based on severity only. Smoking cessation should be done as soon as possible. You may need inhaled bronchodilator (formoterol or albuterol) and inhaled corticosteroids (ICS) (budesonide or fluticasone). Also get done ECG and 2d echo to rule out heart related worsening as active smoking habit can also worsen underlying heart disease (Coronary artery disease). So quit smoking, consult doctor and discuss all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>