Minimal Criteria For Anterior Infarct Are No Longer Present [updated] -

The ECG evolves over time after an MI. Early after an MI, the ECG might show ST elevation, but as time progresses (hours to days), these changes can normalize, and the ECG might show only Q-waves and T-wave inversions, or even a return to a more normal pattern.

According to universal ECG guidelines (e.g., AHA/ACC/HRS 2009), the minimal criteria for a prior anterior infarct are of the following:

There are several reasons why these markers might vanish from your medical record. 1. Electrical Remodeling