Ashman Phenomenon Differential Diagnoses

Updated: Nov 21, 2014
  • Author: Roger Freedman, MD; Chief Editor: Jeffrey N Rottman, MD  more...
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Diagnostic Considerations

Understanding Ashman phenomenon is useful in differentiating wide complex arrhythmias of ventricular origin from supraventricular arrhythmias with aberrancy because the prognosis and treatment of these conditions are different.

A supraventricular impulse with aberrant conduction is confused with a PVC, and a series of consecutive aberrantly conducted supraventricular impulses may appear to be ventricular tachycardia.

Intermittent ventricular preexcitation, as in Wolf-Parkinson-White syndrome, should also be considered in the differential diagnosis of Ashman phenomenon.

It is important to diagnose and appropriately treat disease entities associated with Ashman phenomenon as well as to diagnose ventricular tachycardia.

Differential Diagnoses