EKG AcquisitionQuestion 57 of 100
A physician orders right-sided chest leads on a patient with a suspected right ventricular infarction. Which electrode position corresponds to V4R?
a.Fourth intercostal space, left sternal border
b.Fifth intercostal space, right midclavicular line
c.Fifth intercostal space, left midaxillary line
d.Second intercostal space, right sternal border
Explanation
Right-sided leads mirror the standard positions across the chest, so V4R sits in the fifth intercostal space at the right midclavicular line and is the single most useful lead for right ventricular infarction. The fourth space at the left sternal border is standard V2. The left midaxillary position is V6, and the second space at the right sternal border is not a chest electrode site.
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