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.
Premature Ventricular Contractions. Description. Premature ventricular contractions (PVCs) are beats which are initiated in the ventricles or lower chambers of the heart, prematurely. As opposed to PACs, when the SA node (the natural pacemaker of the heart) gets interrupted, PVCs do not interrupt the SA node.