Table 3.

Best‐Performing ECG Variables and Their Accuracy in Predicting Left Ventricular Recovery

ECG	Recovery	Nonrecovery	Cutoff	Sens	Spec	PPV	NPV	Registration Site	AUC	P Value
Variable	Median	Median
LAD group
First QRS integral	1.01	−1.33	−0.15	85	79	85	79	around V4–V6	0.821	0.002
STT integral	−5.52	−10.65	−9.03	80	71	80	71	left upper back and neck	0.786	0.005
RCA group
First QRS integral	1.72	2.66	2.22	91	80	91	80	upper sternum	0.891	0.015
ST integral	−3.90	2.37	1.3	100	80	92	83	upper sternum and rightward	0.982	0.003
LCX group
STT area	15.19	7.77	8.98	100	83	86	100	around V6–V7	0.972	0.006

Unit of the ECG variables is mVms.

Median indicates median value of the average integrals calculated for each patient from the best registration site, cutoff, the average integral value yielding the highest sum of sensitivity and specificity. AUC = area under the curve; LAD = left anterior descending coronary artery; LCX = left circumflex coronary artery; NPV = negative predictive value; PPV = positive predictive value; First QRS integral = integral of the first quartile of QRS; Sens = sensitivity; Spec = specificity; ST integral = integral of the first half of the interval from QRS end to T‐wave end; STT area = integral of the absolute values from QRS end to T‐wave end; STT int = integral from QRS end to T‐wave end; RCA = right coronary artery; V₄–V₇ = standard ECG chest leads.