Macro reentrant atrial tachycardia

Definition

An atrial arrhythmia in which there is intra-atrial reentry or circus movement around a fixed or functional central obstacle. The central obstacle may consist of normal (e.g. valves) or abnormal (e.g. scar) structures. This form of SVT originates in the atrium; conduction to the ventricles is not necessary for the tachycardia to continue. An organised atrial rhythm with a rate typically between 250 and 350 bpm, including tachycardias using a variety of reentry circuits that often occupy large areas of the atrium ("macro-reentrant"). Here the arrhythmia involves the cavotricuspid isthmus.

5 subordinate codes

• BC81.20Cavotricuspid isthmus dependent macroreentry tachycardia
• BC81.21Non-scar, non-isthmus dependent macro reentrant atrial tachycardia
• BC81.22Scar mediated macro reentrant atrial tachycardia
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified

Nearby in Supraventricular tachyarrhythmia

• BC81.0Ectopic atrial tachycardia
• BC81.1Junctional ectopic tachycardia
• BC81.3Atrial fibrillation
• BC81.4Wolff-Parkinson-White syndrome
• BC81.5Sinus node reentrant tachycardia
• BC81.6Inappropriate sinus tachycardia
• BC81.7Atrioventricular reciprocating tachycardia
• BC81.8Atrioventricular nodal reentry tachycardia