The system that directly receives, records, and displays all ECG signals from ECG electrodes and EP catheters is the ____.

• A. EP recording system
• B. Cardiac Signal Processor
• C. ECG Monitor
• D. Holter Monitor

Answer: (C)

The main idea is that this device is the front-line system for real-time heart electrical activity, bringing in signals from both skin electrodes and intracardiac catheters, recording them, and displaying them for immediate interpretation. An ECG monitor is designed to collect multiple channels of electrical activity, digitize them, and present them on-screen in real time, often with alarms and the ability to store the data for later review. In electrophysiology, clinicians rely on this single monitoring hub to see surface ECG traces alongside intracardiac electrograms, all on one display, to correlate events and guide procedures.

Other options refer to components or setups with different primary roles. A Holter monitor is for long-term ambulatory recording, not real-time lab monitoring. A cardiac signal processor and an EP recording system can be involved in processing and recording signals, but the device that directly displays all ECG signals from both skin leads and EP catheters in real time is the ECG monitor.