DDD pacing
Also written as: DDD — Dual chamber, Dual chamber, Dual response
A dual-chamber pacemaker mode that paces and senses both atrial and ventricular chambers with dual response capability.
Full Definition
DDD pacing represents a sophisticated pacemaker programming mode where the device can pace both the atrium and ventricle, sense electrical activity in both chambers, and respond appropriately by either triggering or inhibiting pacing. This mode maintains atrioventricular synchrony and is considered the most physiologic pacing mode for patients with intact sinus node function but impaired AV conduction. The nomenclature follows the NBG (NASPE/BPEG Generic) pacing code where each 'D' indicates dual functionality.
Usage
Usage note: Always capitalize all three letters; avoid confusion with DDI mode which inhibits rather than tracks atrial activity.
In Context
- "The patient's pacemaker was programmed to DDD mode to maintain optimal hemodynamics." — Device interrogation report
- "DDD pacing at 60-130 bpm with rate response enabled showed appropriate tracking of sinus rhythm." — Cardiology consultation note