EKG Acquisition第 52 / 100 题
How many electrodes are applied for standard 3-lead cardiac monitoring, and what do they produce?
a.Three electrodes producing all 12 leads
b.Five electrodes producing leads I, II, and III
c.Three electrodes producing leads I, II, and III
d.Three electrodes producing leads V1 through V3
解析
Three-lead monitoring uses three electrodes, usually right arm, left arm, and left leg positions, and generates the three bipolar limb leads I, II, and III, with lead II most often selected because it shows P waves well. Twelve leads require ten electrodes. Five-lead systems add a ground and a chest lead, and V1 through V3 are precordial leads that a 3-lead setup cannot produce.
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