Step-by-step explanation:
The upward and downward movement of the waveform in lead I of an ECG is known as a Lead Reversal. It means that the electrodes have been placed incorrectly, usually on the right arm and left arm. Renee can correct the problem by switching the electrode placement on the right arm and left arm. If this does not correct the issue, she may need to check the placement of the other electrodes as well. Ensuring proper electrode placement is crucial in obtaining an accurate ECG reading.