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Sensitive Findings

Ventricular Tachycardia: Sensitivity and Specificity

Introduction: Most common cause of a wide-complex tachycardia (see also Supraventricular Tachycardia). See historical features and Brugada criteria here to distinguish from SVT with aberrancy.

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Tags: Cardiac Problem Tag this Diagnosis.

Differential Diagnoses include: Supraventricular Tachycardia

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
patients with wide-complex tachycardia 74% Ann Emerg Med. 1987 Jan;16(1):40-3. PMID: 3800075
patients with wide-complex tachycardia and history of MI 98% Ann Intern Med. 1988 Dec 1;109(11):905-12. PMID: 3190044
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The sensitivity and specificity of findings for Ventricular Tachycardia are listed below. See the left navigation bar to change the display.

Sensitive and Specific Findings

Finding SensitivitySpecificity Comments, Study
Brugada Criteria Edit 98.7%96.5%

Note: Replication study found sensitivity = 80-90% and specificity = 40-70%, depending on observer. This study did include patients on antiarrhythmics, while Brugada's did not.

Brugada Criteria - Flowchart as follows:

  • Absence of RS in all precordial leads? Yes ->VT
  • No-> RS int (start R - nadir S) > 100ms in one precordial lead? Yes ->VT
  • No-> AV dissociation? Yes ->VT
  • No-> Morphology criteria (if RBBB: V1 has monophasic R OR QR OR RS; V6 R<S OR QS OR QR OR monophasic R; or if LBBB: V1 or V2 has R>30ms OR RS > 60ms OR notched S; V6 QR or QS)? Yes ->VT; No ->SVT
  • Differential Diagnosis: Supraventricular Tachycardia

    Study: Circulation. 1991 May;83(5):1649-59. PMID: 2022022

    Acad Emerg Med. 2000 Jul;7(7):769-73. PMID: 10917326

    Specific Findings

    Finding SensitivitySpecificity Comments, Study
    History of CHF Edit 24%100%

    Study: Ann Emerg Med. 1987 Jan;16(1):40-3. PMID: 3800075

    History of MI Edit 66%95%

    Study: Ann Emerg Med. 1987 Jan;16(1):40-3. PMID: 3800075

    Sensitive Findings

    Finding SensitivitySpecificity Comments, Study
    Age Edit 92%54%

    age > 35

    Study: Ann Emerg Med. 1987 Jan;16(1):40-3. PMID: 3800075

    Gender Edit 90%27%

    male

    Study: Ann Emerg Med. 1987 Jan;16(1):40-3. PMID: 3800075