Identifying rightward rotation in the horizontal plane can be determined by monitoring which leads?

Identifying rightward rotation in the horizontal plane can be determined by monitoring which leads?

• A. V3 and V4
• B. V1 and V2
• C. V5 and V6
• D. Lead I and AVF

Answer: (B)

To identify rightward rotation in the horizontal plane on an EKG, monitoring specific precordial leads is essential. Leads V1 and V2 are positioned in a way that helps to analyze the orientation of the heart in the frontal and horizontal planes, particularly during ventricular depolarization.

When examining the EKG, rightward rotation is evidenced by changes in the QRS complexes within these leads. In the case of rightward rotation, there is typically an upward deflection in V1, transitioning to a more positive deflection in V2. This change indicates that the electrical activity of the heart is moving in a clockwise direction, or rotating to the right, which is consistent with the rotation pattern being assessed.

The other sets of leads mentioned do not provide the same level of assessment for rightward rotation. While V3 and V4 can provide valuable information about the anterior aspects of heart activity, they are less effective in detecting changes in horizontal orientation specifically linked to rightward rotation. Similarly, leads V5 and V6 focus on the lateral aspect, and Lead I and AVF are best suited for assessing frontal plane activity rather than the specific horizontal plane changes related to rightward rotation. Thus, V1 and V2 are the most appropriate choices for