a "sine wave" pattern (see below), which is frequently a fatal rhythm. Giving IV calcium is "cardioprotective" in the setting of hyperkalemia. Frequently, instant reversal of all hyperkalemic ECG ...

Diffuse T wave inversion is stage III of the ECG changes in pericarditis ... and is described as a “grassy knoll” appearance just after the QRS complex. An Osborne wave classically occurs ...