Table 2.

Performance indices of myocardial ischemia detection (the 10th minute of ischemia) using lead I AUC_QRS calculated for hearts with low (L) and high (H) LV mass fraction and united group (L&H)

Analysed group	Se, %	Sp, %	Cut-off, mV·ms	Group used for cut-off calculation
L	89	94	−8*	L
H	100	100	39*	H
L&H	94	90	−8*	L&H
L	79	98	39	H
H	100	85	−8	L
L&H	89	99	39	H

Se – sensitivity; Sp – specificity; * – optimal (‘adjusted’) discriminating cut-off derived from ROC curve for corresponding group