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Multiple Choice
The bipolar leads in an electrocardiogram (ECG) are attached to which parts of the body?
A
Both legs and the right arm
B
Both arms and the left leg
C
Chest and right arm
D
Chest and left leg
Verified step by step guidance
1
Step 1: Understand the concept of bipolar leads in an electrocardiogram (ECG). Bipolar leads measure the electrical activity of the heart by detecting voltage differences between two specific points on the body.
Step 2: Recall the three standard bipolar leads in an ECG: Lead I, Lead II, and Lead III. These leads are part of the limb leads and are attached to specific parts of the body.
Step 3: Learn the placement of electrodes for each bipolar lead: Lead I measures the voltage between the right arm and left arm, Lead II measures the voltage between the right arm and left leg, and Lead III measures the voltage between the left arm and left leg.
Step 4: Note that the correct answer, 'Both arms and the left leg,' corresponds to the placement of electrodes for the limb leads, which are used to record the bipolar leads in an ECG.
Step 5: Eliminate the other options based on anatomical and physiological knowledge. For example, 'Chest and right arm' and 'Chest and left leg' are incorrect because they refer to precordial leads, not bipolar limb leads.