Which option best describes the function of an EP recording system?

• A. It directly receives, records, and displays all ECG/EGM signals from ECG electrodes and EP catheters
• B. It amplifies the ECG signal
• C. It converts digital data back to analog signals
• D. It stores only ventricular signals

Answer: (A)

An EP recording system is designed to interface with all the heart’s electrical signals—from surface ECG leads and intracardiac catheters—so it can directly receive, record, and display those signals. It combines amplification, filtering, and digitization to provide real-time, high-resolution traces and stored data, enabling visualization of atrial and ventricular activity and their timing relationships for mapping and analysis. While amplification is a necessary part of the system, the essential function is the comprehensive capture and display of ECG and intracardiac electrograms from all monitored sites; digital-to-analog conversion is not the primary goal, and the system does not limit storage to ventricular signals.