MY name is Nasser, teacher, 50 years old, 84 kg wight, 167 cm hight, used to be a heavy smoker amonth ago Family history: nothing worth mentioning except that mother died of brain stroke at age 85. My problem is that one time after climbing stairs from one floor to the next I suddenly felt tight chest and difficulty breathing . Since that moment my life has changed by having what has been diagnosed as stable angina. I undergone catherization procedure and it showed no blocked arteries. My aquestion is : does having the angina with unclogged arteries means that my heart muscle was damaged in the attack I mentioned . Thank you for your time and consideration.