Nobrega A C, Castro C L, Araújo C G
Departamento de Fisiologia, Universidade Federal Fluminense, Niterói, RJ, Brasil.
Braz J Med Biol Res. 1990;23(12):1259-62.
To evaluate the relative influence of the two branches of the autonomic nervous system on the 4-s exercise test which measures heart rate acceleration at the onset of exercise, 6 healthy male subjects performed the 4-s test under sympathetic blockade with propranolol, parasympathetic blockade with atropine and dual blockade. The magnitude of the 4-s test results (means +/- SD) was significantly different only between the conditions with and without atropine (1.04 +/- 0.03 vs 1.53 +/- 0.33, respectively), with no differences between the control (1.60 +/- 0.25) and the test under sympathetic blockade (1.51 +/- 0.33). These results support the conclusion that the 4-s exercise test is a specific method for the evaluation of parasympathetic activity.
为评估自主神经系统的两个分支对测量运动开始时心率加速的4秒运动试验的相对影响，6名健康男性受试者在使用普萘洛尔进行交感神经阻滞、使用阿托品进行副交感神经阻滞以及双重阻滞的情况下进行了4秒试验。4秒试验结果的大小（平均值±标准差）仅在使用阿托品和未使用阿托品的情况下存在显著差异（分别为1.04±0.03和1.53±0.33），而对照组（1.60±0.25）与交感神经阻滞试验组（1.51±0.33）之间没有差异。这些结果支持以下结论：4秒运动试验是评估副交感神经活动的一种特定方法。
