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{{CMG}}
{{CMG}}


{{SK}} PMT
{{SK}} PMT, endless loop tachycardia,


==Overview==
==Overview==
It is a possible complication of dual-chamber [[artificial pacemakers]].
Pacemaker mediated tachycardia is a condition in which an artificial implanted pacemaker stimulates the the ventricles (the lower chambers of the heart) to beat at rates that are inappropriately fast.


==Pathophysiology==
==Pathophysiology==
Pacemaker mediated tachycardia is a form of [[AV nodal reentrant tachycardia]].  In PMT, the artificial pacemaker forms the anterograde ([[atrium]] to [[ventricle]]) limb of the circuit and the atrioventricular (AV) node forms the retrograde limb (ventricle to atrium) of the circuit.
Pacemaker mediated tachycardia is a form of [[AV nodal reentrant tachycardia]].  In PMT, the artificial pacemaker forms the anterograde ([[atrium]] to [[ventricle]]) limb of the circuit and the atrioventricular (AV) node forms the retrograde limb (ventricle to atrium) of the circuit.
==Causes==
*The rate response setting of the pacemaker is set too sensitive
*Tracking of noise in the atrium as can occur with electromagnetic interference
*Tracking an atrial tachyarrhythmia by the dual chamber pacemaker


==Treatment==
==Treatment==

Revision as of 23:32, 4 August 2013

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Synonyms and keywords: PMT, endless loop tachycardia,

Overview

Pacemaker mediated tachycardia is a condition in which an artificial implanted pacemaker stimulates the the ventricles (the lower chambers of the heart) to beat at rates that are inappropriately fast.

Pathophysiology

Pacemaker mediated tachycardia is a form of AV nodal reentrant tachycardia. In PMT, the artificial pacemaker forms the anterograde (atrium to ventricle) limb of the circuit and the atrioventricular (AV) node forms the retrograde limb (ventricle to atrium) of the circuit.

Causes

  • The rate response setting of the pacemaker is set too sensitive
  • Tracking of noise in the atrium as can occur with electromagnetic interference
  • Tracking an atrial tachyarrhythmia by the dual chamber pacemaker

Treatment

The treatment of PMT typically involves reprogramming the pacemaker.

References

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