There appears to be some heart cells that may have been damaged by a prior heart attack. Left atrium is the upper chamber above the left ventricle...it is enlarged. Ischemia indicates a lack of adequate blood flow usually due to occluded vessels.
Do you have symptoms of chest pains or shortness of breat. etc? T-wave abnormalities by their own, without the detection of chest pain or similar such symptoms, are neither conclusively proven of any harm, nor a sign of problem in future. It is only when these accompany pains, that a doctor consider it as an alarming development.
I have listed some causes of t wave abnormailty: A slight strain accompanied by left or right ventricular hypertrophy. A slight enlargement in the body part is reflected as a major fluctuation in the T-wave.
•A condition known as 'Digoxin effect', can also be detected as a variation on the ECG reader. This is a condition in which the contractions of the heart occur at an abnormal rate.
•Falling out or a damage in the mitral valve region
•Lack of vitality or anemia in the central muscular region of the heart causes coagulation of blood, which is verified by T-wave abnormality.
•Inflammation of a part of the cardiac region.
Your doctor will diagnose based on the totality of your synptoms and test.
Hope this helps. Thanks for sharing.