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 ...

Eventually a “sine wave” pattern ensues ... leads in the setting of left ventricular hypertrophy. The most common ECG finding of an acute pulmonary embolism is sinus tachycardia; however ...

Sine-wave speech can be thought of as a sort of auditory illusion, a sensory edge case in which one’s experience has a clear “before” and “after” moment, like going through a one-way door.

These ECG voltage attenuations are of extracardiac mechanism, and impact the amplitude of QRS complexes, P-waves, and T-waves, occasionally resulting also in shortening of the QRS complex and QT ...