A patient has been diagnosed with premature ventricular contractions.The nurse realizes that this dysrhythmia can result from a weaker than normal stimulus during which action potential period?
A)Absolute refractory period
B)Relative refractory period
C)Supranormal period
D)Subnormal period

Question

Quizplus · Accepted Answer

Premature ventricular contractions (PVCs) can occur during the supranormal period, a phase shortly after the relative refractory period in the cardiac action potential, where a weaker-than-normal stimulus can cause depolarization. This period is more susceptible to abnormal impulses, leading to PVCs.

A Patient Has Been Diagnosed with Premature Ventricular Contractions