An Access field property that limits the number of characters that can be typed into a text or number field. Foreign key. A field in one table that is also the primary key of a second table; it is used to create a relationship with that table.
burst pacing. Also found in: Dictionary, Thesaurus, Wikipedia. fast pacing. A term defined in the context of implantable pacemakers for the deliveryâe.g., atrial burst pacingâof rapid, multiple electrical pulses, to pace the heart faster than its intrinsic rate. Fast pacing is used for ventricular tachycardia, to try to break the tachycardia before it progresses to ventricular fibrillation. burst pacing.
Failure to capture is when the pacemaker signal fires but there is no response. This is identified by having pacing spikes present with no resulting QRS, (capture). The example below shows the first two ventricular paced beats capture, then the next two spikes fire but there is no capture. The last beat captures. Pacemaker Failure to Sense. In most cases, sensing problems are less threatening and can be corrected by performing a pacemaker interrogation. Sensing problems include undersensing where the pacemaker fails to sense the native cardiac rhythm.