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Table 2 List of counters used in the AF-VP model

From: Open source model for generating RR intervals in atrial fibrillation and beyond

Counter Increment condition
AF impulse counter Arrival of AF impulse
Atrial invasion counter Retrograde wave escapes the AVJ
AV block counter Antegrade or retrograde AV block (w/o fusion)
AVJ fusion counter Collision of antegrade & retrograde waves in AVJ
Ventricular fusion counter Collision of antegrade & retrograde waves in ventricle
VS counter VS event
VP counter VP event
Beat counter VS or VP event