Hello Thanks for posting at HCM. Since you have diabetes And history of heart disease with three stents and symptoms of chest pain after exertion, an angina cannot be ruled out. You define it as non angina pains. But any chest pain in a diabetic person with a history of heart disease should not be ignored. You have premature heart disease with three stents already at the age of 45, so your pains cannot be underestimated before you don t feel it s typical angina pain. We must get you evaluated with a treadmill test which requires you to walk on a treadmill while your ECG is continuously being monitored and a 2 D echo. Please get a TMT done. Wishing you good health Regards