The nurse notes that a patient has a low serum potassium level.Which phase of the cardiac action potential will be most affected by this blood level?

Question

Quizplus · Accepted Answer

Phase 3 of the cardiac action potential is the repolarization phase, which is largely dependent on the efflux of potassium ions from the cell. Therefore, a low serum potassium level would affect this phase the most by reducing the amount of potassium ions available for repolarization.

The Nurse Notes That a Patient Has a Low Serum