BC81.2 Macro reentrant atrial tachycardia

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

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.

sections/codes in this section (BC81.2-BC81.2)

• Cavotricuspid isthmus dependent macroreentry tachycardia  (BC81.20)
• Non-scar, non-isthmus dependent macro reentrant atrial tachycardia  (BC81.21)
• Scar mediated macro reentrant atrial tachycardia  (BC81.22)
• Other specified macro reentrant atrial tachycardia  (BC81.2Y)
• Macro reentrant atrial tachycardia, unspecified  (BC81.2Z)

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