How often do you see an ECG that is just a little off? Maybe the T wave is flat, oddly-shaped or inverted. Maybe the ST segment is coved, very minimally-depressed or shows some J point elevation.

Wellen's phenomenon occurs when biphasic T waves are seen in leads V1-V3, or deep symmetric inverted T waves are seen in the precordial leads. Both of these ECG findings are indicative of a severe ...