You are placing the electrodes for an ECG on a patient who weighs 342 pounds, and you cannot find the midclavicular line. What should you do to place lead V4?
A. Use the nipple line as the guide.
B. Place lead V3 and V5 first, then place lead V4 in the middle.
C. Place the lead where you think it should go.
D. Use the clavicle as the landmark.
Answer: D
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