atrial capture


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a·tri·al cap·ture

control of the atria for one or more beats after a period of independent beating, as in incomplete AV block or in junctional or ventricular ectopic beats or tachycardias by a retrograde impulse.
References in periodicals archive ?
ACap™ Confirm Setup test included three phases: atrial capture verification, atrial rate overdrive, and atrial threshold search.
(5) The dissociation can result from 1) slowing of the dominant pacemaker (in most cases, the sinus node), which allows an escape junctional or ventricular rhythm, (6,7) or 2) acceleration of a latent pacemaker, such as a junctional site or a ventricular site that activates the ventricles without retrograde atrial capture. (6) The former situation can be seen during periods of sinus arrhythmia, sinus bradycardia, sinus arrest, or sinoatrial exit block, and the latter with accelerated junctional rhythm and ventricular tachycardia.
A 5-French catheter electrode (Japan Lifeline, Tokyo, Japan) was inserted into the esophagus under the monitoring of an esophageal electrogram and placed to ensure constant atrial capture with the lowest threshold.