HP Hewlett Packard 78534A Arrhythmia Monitor Terminal ECG Cardiac Display

HP Hewlett Packard 78534A Arrhythmia Monitor Terminal ECG Cardiac Display

The HP 78534A is a dedicated monitor/terminal unit designed as part of Hewlett-Packard's arrhythmia monitoring system. It combines a built-in CRT display with a modular front-panel bay system and a full set of controls for reviewing, storing, and managing cardiac waveform data. The front panel provides direct access to real-time and delayed ECG recordings, alarm management, and system control functions — all organized around the needs of clinical arrhythmia surveillance.

Specifications & What's Included

• Manufacturer: Hewlett-Packard (HP)
• Model: 78534A Monitor/Terminal
• Display: Built-in CRT screen
• Front-panel controls: Overview, Store, Real Time, Delayed Recorder, Control, Clear, Test, Suspend, Silence/Reset, Alarms
• Multiple front-panel plug-in module bays (several modules installed — see photos)
• Form factor: Benchtop/tabletop
• Power cord attached (visible in rear photo)
• Rear panel: ventilation grille and rear connectors visible

Applications

The HP 78534A was part of Hewlett-Packard's modular arrhythmia monitoring platform, used in hospital cardiac care units, telemetry wards, and step-down units for continuous ECG surveillance. These systems were designed to detect, store, and review arrhythmia events across multiple monitored patients, giving clinical staff both real-time waveform views and a delayed-recorder function for retrospective review. HP was a major supplier of clinical monitoring equipment from the 1970s through the 1990s, and systems like this formed the backbone of hospital cardiac monitoring before fully digital, networked platforms became standard. Today, units like this are sought by hospitals maintaining legacy HP monitoring infrastructure, biomedical engineers, collectors of vintage medical electronics, and institutions using compatible HP monitoring modules.