EKG第 69 / 100 题
When placing precordial (chest) leads for a 12-lead EKG, where is lead V1 positioned?
a.Fourth intercostal space at the right sternal border
b.Fourth intercostal space at the left sternal border
c.Fifth intercostal space at the midclavicular line
d.Fifth intercostal space at the anterior axillary line
解析
Lead V1 is placed in the fourth intercostal space at the right sternal border. Accurate placement of V1 is critical because the other chest leads are positioned relative to it. Misplacement produces inaccurate waveforms and can lead to misinterpretation.
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