In the standard lead layout, which leads occupy the first column?

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Multiple Choice

In the standard lead layout, which leads occupy the first column?

Explanation:
Think about how a standard 12-lead ECG printout is organized. The leads are displayed in four columns, with each column grouping a set of leads. The first column contains the three original limb leads: I, II, and III. These are the bipolar limb leads that view the heart’s activity in the frontal plane. The second column holds the augmented limb leads: aVR, aVL, and aVF. The third column shows the chest leads: V1, V2, and V3, while the fourth column has V4, V5, and V6. So the first column is I, II, and III.

Think about how a standard 12-lead ECG printout is organized. The leads are displayed in four columns, with each column grouping a set of leads. The first column contains the three original limb leads: I, II, and III. These are the bipolar limb leads that view the heart’s activity in the frontal plane. The second column holds the augmented limb leads: aVR, aVL, and aVF. The third column shows the chest leads: V1, V2, and V3, while the fourth column has V4, V5, and V6. So the first column is I, II, and III.

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