Ashman phenomenon
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The Ashman phenomenon, also known as Ashman beats, describes a particular type of wide complex tachycardia (fast rhythm of the heart) that is often seen in atrial fibrillation. In particular, it is important because it can be misinterpreted as non-sustained ventricular tachycardia.
Ashman beats are described as wide complex QRS complexes that follow a short R-R interval preceded by a long R-R interval. This wide QRS complex represents an abberantly conducted complex that originates above the AV node, rather than a complex that originates in either the right or left ventricle.
EKG Examples
Ashman phenomenon |
Reference
- Ashman R, Byer E. Aberration in the conduction of premature ventricular impulses. J La State Med Soc 8:62, 1946
See also
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
