The patient is a 65 year old, hypertensive and diabetic female with T-wave inversion V1 to V6 on ECG. ECHO and TMT have done to evaluate further, which was reported to be normal. The patient is on Metformin XR and Tazloc-H. The patient is asymptomatic. Six months back, ECG did not show these changes. She is hypertensive for 15 years and diabetic for the last 10 years. What could be the cause of these changes? Please advice.