After reviewing an electrocardiogram, the nurse determines that an electrical impulse originated in a patient's sinoatrial node. What did the nurse see on this tracing?

Question

Quizplus · Accepted Answer

The presence of a positive P wave before a QRS complex on an electrocardiogram indicates that the electrical impulse originated in the sinoatrial node, which is the normal pacemaker of the heart. This leads to the atrial depolarization that is represented by the P wave.

After Reviewing an Electrocardiogram, the Nurse Determines That an Electrical