Table 1. QRS amplitudes and Tslew values.

Index	POD 3	POD 5	POD 7
QRS
Isograft group	0.91±0.07	0.89±0.08	0.88±0.07
Allograft group	0.88±0.10	0.71±0.13	0.61±0.13
P	0.3799	0.0006	0.0009
Tslew
Isograft group	0.95±0.04	0.94±0.04	0.93±0.04
Allograft group	0.95±0.05	0.82±0.09	0.76±0.06
P	0.8127	0.0001	0.0000

POD, postoperative days; QRS, QRS amplitude; Tslew, the maximum slope of the descending T wave of ventricular evoked response (VER); the data are represented as the mean ± SD (n=10).