What is the function of the signal amplifier?

What is the function of the signal amplifier?

• A. Amplify and process cardiac signals
• B. Deliver pacing impulses
• C. Filter the blood
• D. Display pressure waveforms

Answer: (A)

The main idea here is that the signal amplifier’s job is to boost and refine the heart’s electrical signals. Cardiac electrical activity is extremely small, so the amplifier increases their amplitude to a usable level for the recording system. It also helps reduce noise and may apply conditioning like filtering and impedance matching to preserve the true waveform and timing. This makes intracardiac and surface ECG signals reliable for interpretation, mapping, and analysis. Delivering pacing impulses is done by the pacing system, not the amplifier. Filtering blood or displaying pressure waveforms are separate functions handled by other sensors and monitors, not the signal amplifier.

The main idea here is that the signal amplifier’s job is to boost and refine the heart’s electrical signals. Cardiac electrical activity is extremely small, so the amplifier increases their amplitude to a usable level for the recording system. It also helps reduce noise and may apply conditioning like filtering and impedance matching to preserve the true waveform and timing. This makes intracardiac and surface ECG signals reliable for interpretation, mapping, and analysis.

Delivering pacing impulses is done by the pacing system, not the amplifier. Filtering blood or displaying pressure waveforms are separate functions handled by other sensors and monitors, not the signal amplifier.