Table 2. The sensitivity, specificity and predictive values of electrical dyssynchrony (present diagnosis using the intra+interDC together with TC and TC alone in all patients and in subgroups).

Criterion-subgroup	Sensitivity (%)	Specificity (%)	PPV(%)	NPV(%)
Intra+interDC: intraventricular and intraventricular dyssynchrony criteria; LBBB: left bundle branch block; NICD: nonspecific intraventricular conduction disturbance; NPV: negative predictive value; PPV: positive predictive value; TC: traditional criteria. The sensitivity of TC was always 100% and the specificity and NPV 0, because patient selection to CRT was based on the TC. Reproduced with permission from Ref. 17.
Intra + inter DC + TC all patients	95.7	35.9	77.9	77.8
TC all patients	100	0	71.8	0
Intra + inter DC + TC LBBB	100	14.3	82.4	100
TC LBBB	100	0	80	0
Intra+interDC+TC NICD	100	50	80.6	100
TC NICD	100	0	67.4	0