mode switching
Automatic pacemaker algorithm that temporarily changes from atrial-tracking to non-tracking mode during atrial arrhythmias.
Full Definition
Mode switching is an intelligent pacemaker algorithm designed to prevent rapid ventricular pacing during episodes of atrial fibrillation or atrial flutter. When the device detects sustained high atrial rates indicative of atrial arrhythmias, it automatically switches from dual-chamber tracking modes (like DDD) to non-tracking modes (like VVI or DDI) to avoid tracking the irregular atrial signals. This prevents the ventricles from being paced at dangerously high rates while maintaining appropriate ventricular support. Modern devices include sophisticated mode-switching algorithms with programmable detection criteria and switching behaviors.
Usage
Usage note: Hyphenate as 'mode-switching' when used as a compound modifier; use 'mode switching' as a noun phrase.
In Context
- "Mode switching episodes correlated with the patient's paroxysmal atrial fibrillation burden." — Holter monitor interpretation
- "The mode switching algorithm successfully prevented ventricular tracking of atrial flutter." — Pacemaker interrogation summary