ECG findings		Lesion	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)
ST-segment elevation greater in lead III than in lead II plus ST-segment depression of > 1 mm in lead I, lead aVL, or both		Right coronary artery	90	71	94	70
Absence of the above findings plus ST-segment elevation in leads I, aVL, V5, and V6 and ST-segment depression in leads V1, V2, and V3		Left circumflex coronary artery	83	96	91	93
ST-segment elevation in leads V1, V2, and V3 plus any of the features below:
	ST-segment elevation of > 2.5 mm in lead V1, right bundle branch block with Q wave, or both	Proximal LAD coronary artery	12	100	100	61
	ST-segment depression of > 1 mm in leads II, III, and aVF	Proximal LAD coronary artery	34	98	93	68
	ST-segment depression of ≤ 1 mm or ST-segment elevation in leads II, III, and aVF	Distal LAD coronary artery	66	73	78	62