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对原发性高血压（EH）60例、正常对照31例的尿去甲肾上腺素（UNE）及肾上腺素（UE）含量进行测定，以观察交感神经活性对（EH）的影响。EH组24h、日间、夜间UNE含量显著高于正常组（P＜0.01）．而EH组UE含量与正常组比较则无显著差异（P＞0．05）。正常组UNE含量日间显著高于夜间（P＜0．01），EH组UNE含量则无此昼夜规律性（P＞0．05）、以正常组UNE均值加2s（＋2s）作为正常高限．EH患者24h及夜间UNE含量高于正常高限者分别占19例（31．7％）及12例（2％）．反映了部分EH患者交感神经活性可有明显增高。
The levels of urinary norepinephrine (UNE) and epinephrine (UE) in 60 patients with essential hypertension (EH) and 31 normal controls were measured to observe the effect of sympathetic nerve activity (EH). The levels of UNE in EH group were significantly higher than those in normal group at 24h, day and night (P <0.01). However, the content of UE in EH group was not significantly different from that in normal group (P> 0.05). The levels of UNE in the normal group were significantly higher than those in the night (P <0.01), while those in the EH group were not (P> 0.05). The mean value of the UNE plus 2s (+ 2s) . EH patients at 24 hours and night UNE levels were higher than the normal high limit accounted for 19 cases (31.7%) and 12 cases (2%). Reflects some patients with sympathetic EH activity may be significantly higher.