Answer 8

8.  Choice B is the correct answer.  A key characteristic with hyperkalemia is that the P wave is flattened, the QRS complex is widened, and the T waves are peaked.  This is contrasted with hypokalemia where the T waves become flattened and there can be a U wave.  Calcium affect the QT interval.  With hypercalcemia, the QT interval is shortened.  With hypocalcemia, the QT interval is prolonged.