What does VVI mode mean?
VVI(R) is ventricular demand pacing. The ventricle is paced, sensed, and the pulse generator inhibits pacing output in response to a sensed ventricular event. This mode of pacing prevents ventricular bradycardia and is primarily indicated in patients with atrial fibrillation with a slow ventricular response.
What is DDD mode in pacemaker?
DDD mode is the standard programming option in dual chamber and resynchronization (with added left ventricular lead) therapy pacemakers. It enables maintanance of atrioventricular synchrony at rest but also during exercise when the intrinsic or paced atrial rate is elevated.
What is OOO mode?
AOO – asynchronous atrial pacing Asynchronous atrial pacing mode is usually the programmed response of an AAI pacemaker to the application of a magnet. This is never a permanent mode. In general, it is said that asynchronous pacing is contraindicated in the presence of intrinsic cardiac rhythms.
What does the code DDI mean?
DDI = Like above, but the atrial activity is tracked into the ventricle only when the atria is paced. DOO = asynchronous A+V pacing. VOO = asynchronous V pacing.
How are pacemakers programmed?
Modern pacemakers have multiple functions. The simplest settings are VVI and AAI. The VVI mode senses and paces the ventricle and is inhibited by a sensed ventricular event. Alternatively, the AAI mode senses and paces in the atrium, and each sensed event triggers the generator to fire within the P wave.
How do you read a pacemaker code?
Pacemaker codes It usually consists of three letters, but some systems use four or five: Letter 1: chamber that is paced (A = atria, V = ventricles, D = dual-chamber). Letter 2: chamber that is sensed (A = atria, V = ventricles, D = dual-chamber, 0 = none).
What does Dddr stand for?
DDDR
| Acronym | Definition |
|---|---|
| DDDR | Dual Chamber Rate Adaptive Pacemaker |
| DDDR | Port D Data Direction Register (computing) |
What does NBG code stand for?
It is abbreviated as the NBG (for “NASPE/BPEG Generic”) Code, and was developed to permit extension of the generic-code concept to pacemakers whose escape rate is continuously controlled by monitoring some physiologic variable, rather than determined by fixed escape intervals measured from stimuli or sensed …
What happens when a pacemaker fails to sense?
Undersensing occurs when the pacemaker fails to detect spontaneous myocardial depolarization, which results in asynchronous pacing. Atrial or ventricular pacing spikes arise regardless of P waves or QRS complex. This typically results in the appearance of too many pacing spikes, as seen on ECG (Fig. 3).