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.

PR segment depression can be from acute pericarditis or an atrial infarction. Diffuse T wave inversion is stage III of the ECG changes in pericarditis. Pericarditis can be distinguished from early ...