Wide complex tachycardia differential diagnosis: Difference between revisions
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Revision as of 21:31, 7 February 2013
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Differential Diagnosis
Algorithms to Distinguish VT from SVT
Brugada Criteria
Vereckei Criteria
An algorithm has been proposed by Vereckei and colleagues. In addition to to do the traditional criteria, the voltage change on the EKG is used as a final discriminatory criteria. In this method, the voltage change during the initial 40 ms (v(i)) and the terminal 40 ms (v(t)) of the same QRS complex is used to estimate the (v(i)) and terminal (v(t)) ventricular activation velocity ratio (v(i)/v(t)). A v(i)/v(t) >1 suggests SVT and a v(i)/v(t) <or=1 suggests VT. [1]
The method calculating Vi / Vt is shown below. Because the Vi/Vt si < 1, a diagnosis of VT is suggested by the tracing:
ACC Algorithm for Distinguishing SVT from VT
The above figure is adapted from the American College of Cardiology algorithm.
References
- ↑ Vereckei A, Duray G, Szénási G, Altemose GT, Miller JM (2007). "Application of a new algorithm in the differential diagnosis of wide QRS complex tachycardia". European Heart Journal. 28 (5): 589–600. doi:10.1093/eurheartj/ehl473. PMID 17272358. Retrieved 2012-10-13. Unknown parameter
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