Tachycardia: Difference between revisions

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===AV Re-entry Tachycardia (AVRT)===
===AV Re-entry Tachycardia (AVRT)===
====Pathophysiology:====  
====Pathophysiology:====  
AVRT are tachycardias with a re-entry circuit compromising the entire heart. Atria, AV-node, ventricle and an extra bundle are an essential part of this circuit. The pre-requisite of an AVRT is the existence of an extra bundle between the atria and ventricle. This bundle can bypass the AV-node and connect to ventricular myocardium or one of the fascicles. The conduction direction of these bundles can be anterograde (atrium-ventricle), retrograde (ventricle-atrium) or bidirectional.  
AVRT are tachycardias with a re-entry circuit compromising the entire heart. Atria, AV-node, ventricle and an extra bundle are an essential part of this circuit. The pre-requisite of an AVRT is the existence of an extra bundle between the atria and ventricle. This bundle can bypass the AV-node and connect to ventricular myocardium or one of the fascicles. The conduction direction of these bundles can be anterograde (atrium-ventricle), retrograde (ventricle-atrium) or bidirectional. Some of the bundles exhibit AV-nodal like conduction properties, these are Maheim bundles.  
The following bundles exist:
The following bundles exist:
* Bundle of Kent: A connection between atria and ventricles most often located on the lateral side of the atria\ventricles.
* Bundle of Kent: A connection between atria and ventricles most often located on the lateral side of the atria\ventricles.
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