What are leads in ECG monitoring?

• A. P Wave
• B. Leads
• C. Pacemaker
• D. Polarization

Answer: (B)

Leads are the electrical viewpoints used to record the heart’s activity. They are the electrodes placed on the chest and limbs that connect to the ECG machine, and each lead provides a different angle or vector of the heart’s electrical activity. Together, the multiple leads (as in a standard 12-lead ECG) give a comprehensive view of rhythm and conduction, helping detect abnormalities. The P wave, pacemaker, and polarization aren’t what describes the recording system: the P wave is a part of the tracing, a pacemaker is a device, and polarization isn’t the term used for ECG monitoring views.