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Tachycardia: Difference between revisions
→AV Re-entry Tachycardia (AVRT)
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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. | ||