DDD pacing
Also written as: DDD — Dual chamber, Dual chamber, Dual response
A dual-chamber pacing mode that can pace and sense both atria and ventricles with dual response capability.
Full Definition
DDD pacing is a comprehensive dual-chamber pacing mode where the device can pace both the atrium and ventricle, sense electrical activity in both chambers, and respond to sensed events 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 mode automatically adjusts between AAI, VVI, and dual-chamber pacing based on the patient's intrinsic rhythm.
Usage
Usage note: Always capitalize all three letters when referring to the pacing mode.
In Context
- "The patient was programmed to DDD pacing mode with a lower rate limit of 60 bpm." — Implant procedure note
- "DDD pacing maintained AV synchrony and improved the patient's exercise tolerance." — Clinical outcomes report