Pacemaker mediated tachycardia: Difference between revisions
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*Tracking of noise in the atrium as can occur with electromagnetic interference | *Tracking of noise in the atrium as can occur with electromagnetic interference | ||
*Tracking an atrial tachyarrhythmia by the dual chamber pacemaker | *Tracking an atrial tachyarrhythmia by the dual chamber pacemaker | ||
==Diagnosis== | |||
===Symptoms=== | |||
The majority of patients are asymptomatic. Some patients may complain of the following: | |||
*[[Chest pain]] | |||
*[[Lightheadedness]] | |||
*[[Palpitations]] | |||
*[[Rapid heart rate]] | |||
*[[Syncope]] | |||
==Treatment== | ==Treatment== | ||
Revision as of 23:35, 4 August 2013
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
Diagnosis
Symptoms
The majority of patients are asymptomatic. Some patients may complain of the following:
Treatment
The treatment of PMT typically involves reprogramming the pacemaker.