Final answer:
Lead II in an ECG records electrical impulses related to the depolarization and repolarization of the heart.
Step-by-step explanation:
Lead II in an Electrocardiogram (ECG)
In an electrocardiogram (ECG), Lead II records the electrical impulses related to the depolarization and repolarization of the heart. Lead II measures the voltage between the right arm and the left leg in the body. This voltage potential is graphed as a waveform on the ECG and provides valuable information about the function and health of the heart.
Example:
When the atria depolarize during a heartbeat, it creates a P wave on the ECG. The QRS complex represents the depolarization of the ventricles, and the T wave corresponds to the repolarization of the ventricles. Lead II allows us to visualize and analyze these electrical events in the heart.