Normal ST segment (asymmetric upsloping ST segment with concavity, slight ST segment elevation).

Abnormal ST segment elevation or lack of normal upward concavity in the first part of the ST-T segment (as seen in LVH or acute ischemia or injury).

ST-T segment typical of acute or recent myocardial infarction, i.e., the ST-T segment appears as though a thumb were pushed up into it.

Negative amplitudes in the latter part of the ST-T segment (may be seen in ischemia or old infarction.

Negative T wave (may be a non-specific sign, but may be seen in ischemia or old.

Downward sloping in the first part of the STT segment (consider ischemia, digitalis or hypokalemia).

Flat ST-T segment (a non-specific sign).

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