Table 4 Exercise test results at basal evaluation and at follow‐up evaluation in patients treated with spinal cord stimulation and control patients.
| SCS (n = 17) | Controls (n = 9) | p Value | |
|---|---|---|---|
| Peak exercise | |||
| Test duration (s) | |||
| Basal | 362 (126) | 313 (72) | <0.05 |
| Follow‐up | 428 (101)* | 310 (86) | |
| Heart rate (bpm) | |||
| Basal | 123 (25) | 117 (22) | 0.15 |
| Follow‐up | 132 (21) | 116 (16) | |
| Systolic blood pressure (mm Hg) | |||
| Basal | 138 (11) | 146 (13) | <0.005 |
| Follow‐up | 160 (15)† | 147 (10) | |
| Rate‐pressure product (bpm x mm Hg) | |||
| Basal | 17002 (3848) | 17138 (3887) | <0.005 |
| Follow‐up | 21156 (4066)† | 17082 (2914) | |
| 1 mm ST segment depression | |||
| No of patients | |||
| Basal | 14 (82%) | 7 (78%) | 0.58 |
| Follow‐up | 8 (47%) | 7 (78%) | 0.085 |
| Time (s) | |||
| Basal | 274 (148) | 262 (99) | <0.05 |
| Follow‐up | 365 (131)‡ | 268 (60) | |
| Heart rate (bpm) | |||
| Basal | 107 (17) | 104 (14) | <0.01 |
| Follow‐up | 124 (21)‡ | 103 (13) | |
| Systolic blood pressure (mm Hg) | |||
| Basal | 135 (11) | 136 (11) | <0.05 |
| Follow‐up | 155 (16)‡ | 138 (7) | |
| Rate‐pressure product (bpm x mm Hg) | |||
| Basal | 14571 (3076) | 14127 (2138) | <0.005 |
| Follow‐up | 19432 (4543)‡ | 13984 (1972) | |
| Angina | |||
| No of patients | |||
| Basal | 10 (59%) | 6 (67%) | 0.52 |
| Follow‐up | 9 (53%) | 6 (67%) | 0.40 |
| Time (s) | |||
| Basal | 236 (84) | 254 (54) | <0.05 |
| Follow‐up | 350 (101)‡ | 262 (92) | |
| Heart rate (bpm) | |||
| Basal | 99 (15) | 101 (8) | <0.01 |
| Follow‐up | 115 (17)* | 99 (8) | |
| Systolic blood pressure (mm Hg) | |||
| Basal | 132 (6) | 135 (8) | <0.05 |
| Follow‐up | 146 (12)‡ | 137 (12) | |
| Rate‐pressure product (bpm x mm Hg) | |||
| Basal | 13073 (2177) | 13702 (1553) | <0.01 |
| Follow‐up | 16845 (3580)‡ | 13628 (2131) | |
SCS, spinal cord stimulation.
Values are represented as mean (SD).
*p<0.01 versus basal evaluation.
†p<0.05 versus basal evaluation.
‡p<0.005 versus basal evaluation.