Robert et al developed an equation for predicting the probability of coronary artery disease in a woman undergoing exercise testing. The authors are from the University of Louvain in Brussels.
Parameters:
(1) work load in watts during exercise testing (W)
(2) heart rate in beats per minute
(3) ST60 segment change in X lead in mm (depression is indicated by a negative number)
where:
• The X lead is from vectorcardiography.
• ST60 is measured at 60 milliseconds after the J point.
P =
= (0.980 * (ST60 in lead X in mm)) + (0.039 * (heart rate)) + (0.021 * (work load in watts)) - 6.635
probability of coronary artery disease =
= 1 / (1 + EXP(P))
Performance:
• Sensitivity 66-70% and specificity: 85-89%.
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