Which component of the ECG lead system is responsible for detecting electrical impulses from the heart?
Electrode
The electrode is the metal/gel sensing element placed on the patient's skin; it is the component that actually detects the heart's small electrical potentials and transmits them through the lead wire to the ECG amplifier.
The monitor and display screen only present the processed signal, and the battery supplies power — none of these detects the cardiac signal itself.
Hence, Electrode.
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