May et al reported the Mayo Clinic VT Prediction model to predict ventricular tachycardia in a patient with ventricular tachycardia. It can help distinguish ventricular tachycardia from supraventricular wide complex tachycardia (SWCT). The authors are from the University of St Louis, Mayo Clinic, and Stanford University.
12-lead ECG are taken at baseline and during wide complex tachycardia (WCT).
Parameters:
(1) QRS axis change from baseline in degrees
(2) T axis change from baseline in degrees
(3) QRS duration during wide complex tachycardia in ms
(4) QRS duration change in ms
Parameter
Points
QRS axis change
0.0211 * (axis change)
T axis change
0.0124 * (axis change)
QRS duration during WCT
0.0532 * (duration)
change in QRS duration
0.0123 * (change)
value of X =
= SUM(points for all of the parameters) - 10.69
risk of ventricular tachycardia =
= 1 / ( 1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.92 for differentiating VT from SWCT.
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