Hello, Welcome to HCM. Anteroseptal infarct seen on ECG or EKG = electrokardiogram means that you did have a heart attack = the heart muscle was damaged by a clogged coronary artery and this is what causes the changes seen by the doctors on the ECG recording. These changes are quite specific and characteristic and it is not likely that other medical conditions like indigestion would have produced them. Also, since these changes were seen on several different occasions, this makes an anteroseptal infarct quite certain. After an infarct the damaged area of the heart muscle undergoes scarring and it may also result in thickening of that area as seen on the Echocardiogram. Some patients, especially diabetics, do not have symptoms like chest pain when they are having their heart attacks, so it is possible to just see the EKG changes of an old MI old myocarial infarction on an EKG while the patient does not even know that they had a heart attack. Typically an acute heart attack causes severe chest pain, Shortness of breath and makes one very ill and treatment in the hospital is required , where blood tests are done to confirm a diagnosis of so called acute MI. Hope this helps you understand this issue. Wishing you best of health.