What are the determinants of the ventricular rate during atrial fibrillation (Afib) (AF)?

Updated: Apr 09, 2019
  • Author: Lawrence Rosenthal, MD, PhD, FACC, FHRS; Chief Editor: Jeffrey N Rottman, MD  more...
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Answer

Regardless of the long-term management strategy chosen, control of ventricular rate is a critical component of management of new-onset AF. The main determinants of the ventricular rate during AF are those intrinsic and extrinsic factors that influence atrioventricular (AV) conduction. Foremost among these are the intrinsic AV nodal conduction properties. Underlying sympathetic and parasympathetic tone also influences AV nodal conduction. Rate-controlling agents act primarily by increasing AV nodal refractoriness.


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