Hello! Welcome and thank you for asking on HCM! Regarding your concern, I would explain that clopidogrel is an antiplatelet agent, used to prevent acute coronary syndrome (also called heart attack) or a brain ischemia. The abnormal finding in your ECG could be related to myocardial ischemia (also called coronary artery syndrome). Your low blood pressure doesn t seem to be related to the ECG changes. I would recommend consulting with a cardiologist and performing further tests to investigate for possible myocardial ischemia: - a cardiac ultrasound to examine your cardiac function and structure - a cardiac stress test or stress echo would examine the cardiac function during exertion and investigate for possible myocardial ischemia - an coronary angiogram. This would be the test of choice to examine the blood flow in the coronary arteries to investigate for possible vessel narrowing, which could lead to myocardial ischemia. This is an invasive test, and should be performed if high suspicions of coronary artery syndrome are raised. Hope you will find this answer helpful! Kind regards, Dr. Iliri