Table 3.

ECG Variables and Their Best Correlations with DE‐CMR‐Determined LV Infarct Percentage at Different Stages of MI

	Acute Phase			Recovery Phase			Chronic Phase
ECG Variable	r max	P‐Value	Lead	r max	P‐Value	Lead	r max	P‐Value	Lead
1st QRSint	0.56	<0.0001	112	0.56	<0.0001	112	0.57	<0.0001	112
2nd QRSint	−0.59	<0.0001	61	−0.59	<0.0001	55	−0.56	<0.0001	54
3rd QRSint	−0.43	0.0009	61	−0.42	0.002	55	−0.39	0.003	54
4th QRSint	0.32	0.02	90		n.s.		0.34	0.01	82
QRSint	−0.62	<0.0001	54	−0.58	<0.0001	55	−0.58	<0.0001	54
Ramp	−0.60	<0.0001	67	−0.59	<0.0001	62	−0.57	<0.0001	61
Samp	−0.51	<0.0001	104	−0.53	<0.0001	113	−0.42	0.001	105
R width	0.64	<0.0001	112	0.65	<0.0001	112	0.71	<0.0001	112
Q width	0.59	<0.0001	71	0.47	0.0003	61	0.51	<0.0001	60
Jamp	−0.30	0.02	5	0.28	0.04	54	0.28	0.03	112
ST60amp	−0.30	0.02	5	0.36	0.008	63	−0.30	0.02	88
ST80amp	−0.33	0.01	5	0.29	0.04	63	−0.35	0.008	80
ST60int	−0.29	0.03	5	0.33	0.02	63		n.s.
ST80int	−0.30	0.02	5	0.33	0.01	63		n.s.
STint	−0.30	0.03	5	0.28	0.04	63	−0.31	0.02	81
ST60slope	0.32	0.01	55	−0.30	0.03	115	0.27	0.04	70
ST80slope	0.28	0.04	47	−0.32	0.02	115	−0.36	0.006	88
Tamp	−0.40	0.002	75	−0.54	<0.0001	72	−0.55	<0.0001	72
T80int	−0.36	0.006	75	−0.52	<0.0001	72	−0.57	<0.0001	72
TPEint	−0.36	0.006	71	−0.54	<0.0001	72	−0.56	<0.0001	72
STTint		n.s.		−0.38	0.004	72	−0.52	<0.0001	72
QRSSTTint	−0.42	0.001	71	−0.50	0.0001	69	−0.54	<0.0001	69
QRSSTTarea	−0.35	0.007	119	−0.51	<0.0001	111	−0.50	<0.0001	111

Correlations ≥0.5 are highlighted.

DE‐CMR = contrast‐enhanced cardiac magnetic resonance imaging; LV = left ventricle.

For explanation of ECG variables, see Table 2.