magnet mode
A temporary pacemaker operating state triggered by placing a magnet over the device, typically resulting in asynchronous pacing.
Full Definition
Magnet mode represents a fail-safe mechanism built into pacemakers and ICDs that temporarily suspends normal sensing functions when a magnet is applied over the device. In pacemakers, this typically results in asynchronous pacing at a predetermined rate regardless of intrinsic cardiac activity. For ICDs, magnet application usually suspends tachyarrhythmia detection and therapy delivery while maintaining bradycardia pacing support. The specific magnet response varies by manufacturer and device model, making it essential to verify the expected behavior before clinical use. This feature is commonly utilized during surgical procedures to prevent electromagnetic interference from affecting device function.
Usage
Usage note: Specify manufacturer-specific magnet responses; avoid confusion with programming or reset functions.
In Context
- "Magnet mode was activated during electrocautery to prevent inappropriate sensing." — Surgical procedure note
- "The device demonstrated appropriate magnet mode response with DOO pacing at 100 bpm." — Device interrogation report