Hello, I understand your concern and would explain that your symptoms could be related to coronary artery disease. Other possible causes to consider would be a lung disorder, chronic anemia, low blood pressure, low blood glucose, etc. Have you measured your blood pressure values during these episodes? Coming to this point, I would recommend performing an exercise cardiac stress test, a cardiac ultrasound, pulmonary function tests and some blood lab tests (complete blood count for anemia, fasting glucose and blood electrolytes for possible imbalance). Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Ilir Sharka, Cardiologist