Term used to describe the situation when a pacemaker defaults or AV conduction fails and another, usually lower pacemaker, assumes the function of pacemaking for one or more beats.
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Evaluation Study of Congestive Heart Failure and Pulmonary Artery Catheterization Effectiveness
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es·cape is-'kāp vb, es·caped; es·cap·ing vi to avoid or find relief from something by means of an escape vt to avoid or find relief from (something) by means of an escape <he was unable to \escape reality>
a) evasion of something undesirable <find no method of \escape from pain and suffering>
b) distraction or relief from routine or reality esp mental distraction or relief by flight into idealizing fantasy or fiction that serves to glorify the self
escape adj providing a means of escape <\escape literature>
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es·cape (əs-kāpґ) the act of becoming free.Medical dictionary. 2011.