ECG - Hyperkalemia

ECG - Hyperkalemia

• • P wave flatten, widen, and later disappear

  • PR prolongation >200 msec, later absent when P waves disappear

  • QRS complexes begin to widen >120 msec, slurred and merge with following T waves, resulting in a "sine wave" pattern

  • ST segments disappear

  • T waves tall, peaked with narrow base. Earliest changes in II, III, V2 - V6

  • Sinus arrest may occur at 7.5

  • Asystole/VF at 10 - 12