Table 3.

Magnetic Resonance Parameters Over Time

Group	Baseline	Year 1	Year 2
Perfusion index
S group	0.48 ± 0.18	0.42 ± 0.44	0.34 ± 0.19
S + E group	0.42 ± 0.13	0.44 ± 0.23	0.37 ± 0.13
E group	0.51 ± 0.16	0.46 ± 0.21	0.54 ± 0.20
All patients	0.48 ± 0.16	0.45 ± 0.21	0.44 ± 0.20
PCr recovery time constant, s
S group	94 ± 77	85 ± 80	84 ± 68
S + E group	104 ± 56	93 ± 46	73 ± 35
E group	83 ± 62	86 ± 65	74 ± 58
All patients	92 ± 64	88 ± 64	78 ± 55
MRA index
S group	0.73 ± 0.50*	0.59 ± 0.38*	0.71 ± 0.46*
S + E group	1.10 ± 0.72	1.26 ± 0.73	1.32 ± 0.86
E group	0.65 ± 0.62	0.73 ± 0.72	0.63 ± 0.64
All patients	0.81 ± 0.64	0.86 ± 0.71	0.88 ± 0.79
MRA ROR index
S group	15.4 ± 7.2	13.7 ± 7.9	13.9 ± 6.2
S + E group	15.0 ± 6.1	15.9 ± 5.4	14.7 ± 6.2
E group	11.2 ± 5.8	11.3 ± 6.4	9.5 ± 4.4
All patients	13.5 ± 6.5	13.6 ± 6.5	12.7 ± 6.2

Values are mean ± SD.

^*p < 0.05 versus S + E group.

MRA = magnetic resonance angiography; PCr = phosphocreatine; ROR = runoff resistance; other abbreviations as in Table 1.