escape pacemaker

escape pacemaker
an ectopic pacemaker that assumes control of cardiac impulse propagation because of failure of the sinoatrial node to generate one or more normal impulses.

Medical dictionary. 2011.

Look at other dictionaries:

  • escape — 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. junctional e. e. with the AV junction as pacemaker. ventricular e …   Medical dictionary

  • pacemaker escape interval — the period between the last sensed spontaneous cardiac activity and the first beat stimulated by the pacemaker …   Medical dictionary

  • Artificial pacemaker — Cardiac resynchronization therapy and CRT (Cardiac Resynchronization Therapy) redirect here. For the device termed a CRT D, see Implanted cardiac resynchronization device. For other uses, see Pacemaker (disambiguation). A pacemaker, scale in… …   Wikipedia

  • Biological pacemaker — The heart is endowed with specialized excitatory and conducting cells that are responsible for the generation and conduction of rhythmic impulses and contractions throughout the heart. If these cells are damaged by disease, the implantation of an …   Wikipedia

  • Junctional escape beat — A junctional escape beat is a delayed heartbeat originating not from the atrium but from an ectopic focus somewhere in the AV junction. It occurs when the rate of depolarization of the SA node falls below the rate of the AV node. This dysrhythmia …   Wikipedia

  • Ventricular escape beat — A ventricular escape beat is a heart rhythm finding, discovered on EKG, that indicates the normal electrical conduction system of the heart is disrupted or performing inadequately. More specifically, it is an ectopic beat that occurs after an… …   Wikipedia

  • ventricular escape — the occurrence of one or more ectopic beats in which a ventricular pacemaker becomes effective before the pacemaker in the sinoatrial node. See also under beat and rhythm …   Medical dictionary

  • atrioventricular junctional escape — the occurrence of one or more escape beats in which the atrioventricular node acts as the cardiac pacemaker; see also under beat and rhythm …   Medical dictionary

  • Cardiac action potential — The cardiac action potential is a specialized action potential in the heart, with unique properties necessary for function of the electrical conduction system of the heart.The cardiac action potential differs significantly in different portions… …   Wikipedia

  • Third-degree atrioventricular block — Classification and external resources ICD 10 I44.2 …   Wikipedia

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