Certified EkG technician (CET) Practice Exam

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What lead is established between the left leg and the right arm plus the left arm?

Lead V1
Lead aVR
Lead 2
Lead aVF

The correct answer is: Lead aVF

The lead that is established between the left leg and the right arm plus the left arm is referred to as Lead aVF. This lead is one of the augmented limb leads used in an electrocardiogram (ECG). In more detail, Lead aVF (augmented Vector Foot) specifically measures the electrical potential between the left leg and the central point formed by the right arm and left arm. The 'augmented' part indicates that this lead is derived from the combination of the standard limb leads to create an enhanced view of the heart's electrical activity directed towards the feet. Understanding the configuration of leads is crucial since each lead provides unique information about heart activity from different angles, helping in accurate diagnosis and treatment planning for various cardiac conditions. The lead placements and their interpretations are fundamental to interpreting ECG results effectively.