EKG AcquisitionQuestion 52 of 100
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
Explanation
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.
Practice all 100 questions free — no signup required.
Related questions on this topic
- How much time and voltage does one large box on standard EKG paper represent?
- A patient has a hairy chest and oily skin. What is the correct skin preparation before applying chest electrodes?
- A technician is setting up 5-lead telemetry monitoring. Which placement follows the standard color convention?
- The QRS complexes on a 12-lead tracing are so tall that they run off the paper and overlap the lead above. What is the appropriate action?
- A patient's heart rate is so fast that the complexes are crowded together and hard to measure. Which machine adjustment can help, and what must the technician remember?
- What is the standard patient position for obtaining a resting 12-lead EKG?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against NHA Certified EKG Technician (CET) Exam · How we review