Table 3. Predictive Values of Wellens’ Sign, Either Symmetrically Inverted T Waves (≥ 0.10 mV) or Biphasic T Waves in Both Leads V2 and V3, for Left Anterior Descending Artery Culprit.

	Sensitivity	Specificity	PPV	NPV	Accuracy
Biphasic T wave in leads V2 and V3	12.30%	99.00%	80.00%	78.40%	78.50%
Symmetrically inverted T wave (≥ 0.10 mV) in leads V2 and V3	12.30%	97.10%	57.10%	78.10%	77.00%
Symmetrically inverted T wave (≥ 0.20 mV) in leads V2 and V3	9.20%	97.60%	54.50%	77.60%	76.70%
Symmetrically inverted T wave (≥ 0.30 mV) in leads V2 and V3	3.10%	99.00%	50%	76.70%	76.30%
Either biphasic or symmetrically inverted T wave (≥ 0.10 mV) in leads V2 and V3	24.60%	96.20%	66.70%	80.40%	79.20%

PPV: positive predictive value; NPV: negative predictive value.