Table 1.
Baseline | Exercise (control) | Inflation (nadir) | Inflation (steady state) | Deflation (acute) | Deflation (steady state) | |
---|---|---|---|---|---|---|
Protocol 1 (n = 9) | ||||||
20% MVC (no drug) | ||||||
FBF, ml/min | 79 ± 8 | 372 ± 37a | 181 ± 23b | 360 ± 40d | 481 ± 51c,d,f | 464 ± 44c,d,f |
FVC, ml · min−1 · (100 mmHg)−1 | 89 ± 11 | 392 ± 33a | 253 ± 25b | 406 ± 38d | 503 ± 51c,d,f | 479 ± 41c,d |
20% MVC (l-NMMA) | ||||||
FBF, ml/min | 61 ± 9 | 356 ± 36a | 159 ± 24b | 306 ± 34d,h | 416 ± 31d,f | 435 ± 38c,d,f |
FVC, ml · min−1 · (100 mmHg)−1 | 66 ± 9 | 370 ± 33a | 242 ± 27b | 347 ± 34d,h | 433 ± 32d,f | 442 ± 36c,d,f |
20% MVC (l-NMMA + aminophylline) | ||||||
FBF, ml/min | 123 ± 17g | 388 ± 32a | 185 ± 25b | 286 ± 40c,e,h | 467 ± 42d,f | 453 ± 39d,f |
FVC, ml · min−1 · (100 mmHg)−1 | 133 ± 20g | 398 ± 30a | 251 ± 29b | 333 ± 36h | 481 ± 46d,f | 460 ± 40d,f |
Protocol 2 (n = 7) | ||||||
20% MVC (no drug) | ||||||
FBF, ml/min | 86 ± 13 | 545 ± 29a | 272 ± 24b | 532 ± 28d | 629 ± 53c,d,f | 614 ± 48d,f |
FVC, ml · min−1 · (100 mmHg)−1 | 95 ± 13 | 583 ± 26a | 386 ± 27b | 605 ± 28d | 660 ± 49c,d | 639 ± 43d |
20% MVC (aminophylline) | ||||||
FBF, ml/min | 120 ± 17h | 562 ± 35a | 289 ± 23b | 462 ± 30e,h | 693 ± 74c,df | 642 ± 48d,f |
FVC, ml · min−1 · (100 mmHg)−1 | 130 ± 17h | 588 ± 42a | 424 ± 28b | 547 ± 32e,h | 710 ± 64c,d,f | 649 ± 44d |
20% MVC (aminophylline + l-NMMA) | ||||||
FBF, ml/min | 112 ± 17 | 548 ± 39a | 245 ± 13b | 376 ± 41c,g | 714 ± 74c,d,f | 644 ± 57d,f |
FVC, ml · min−1 · (100 mmHg)−1 | 120 ± 22 | 555 ± 38a | 361 ± 17b | 453 ± 31g | 734 ± 76c,d,f | 630 ± 45d,f |
Values are means ± SE for n subjects. FBF, forearm blood flow; FVC, forearm vascular conductance; l-NMMA, Ng-monomethyl-l-arginine; MVC, maximal voluntary contraction.
P < 0.001 vs. baseline;
P < 0.001 vs. exercise (control);
P < 0.05 vs. exercise;
P < 0.001 vs. nadir;
P < 0.05 vs. nadir;
P < 0.05 vs. inflation (steady state);
P < 0.05 vs. other trials;
P < 0.05 vs. no-drug trial.