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首页> 外文期刊>Psychosomatic Medicine: Journal of the American Psychosomatic Society >Anxiety and vagal control of heart rate.
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Anxiety and vagal control of heart rate.

机译：焦虑和迷走神经控制心率。

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OBJECTIVE: Prospective studies have demonstrated that anxiety predicts sudden cardiac death, but the mechanism underlying this increased risk is unclear. This study examined whether anxiety is associated with reductions in vagal control of heart rate in healthy volunteers. METHOD: Trait anxiety (T-ANX) was measured, using the Spielberger State-Trait Anxiety Inventory (STAI), in 93 healthy men and women 25 to 44 years of age. Power spectral analysis was used to measure two indices of vagal control: baroreflex control of heart rate (BRC) and respiratory sinus arrhythmia (RSA). RESULTS: High trait anxiety (T-ANX > 41, N = 23) was associated with significantly reduced vagal control of the heart, compared with low trait anxiety (T-ANX < 31, N = 22), as indicated by a 36% reduction in BRC (p< .001) and an 8% reduction in RSA (p<.05). Furthermore, T-ANX scores were negatively correlated with levels of BRC (r = -.30, p<.005), and levels of RSA (r = -.26, p <.05). CONCLUSIONS: These findings provide evidence that trait anxiety is associated with reductions in vagal control of the heart. Additional studies are needed to examine whether low vagal control is involved in the increased risk of sudden cardiac death associated with anxiety.
机译：目的：前瞻性研究表明，焦虑症可预示心脏猝死，但尚不清楚这种增加的危险机制。这项研究检查了焦虑症是否与健康志愿者的迷走神经控制心率降低有关。方法：使用Spielberger状态-特质焦虑量表（STAI）测量了93至25岁至44岁健康男性和女性的特质焦虑（T-ANX）。功率谱分析用于测量迷走神经控制的两个指标：心律的压力反射控制（BRC）和呼吸窦性心律不齐（RSA）。结果：与低特质焦虑（T-ANX <31，N = 22）相比，高特质焦虑（T-ANX> 41，N = 23）与心脏迷走神经控制明显降低有关。 BRC降低（p <.001），RSA降低8％（p <.05）。此外，T-ANX评分与BRC水平（r = -.30，p <.005）和RSA水平（r = -.26，p <.05）负相关。结论：这些发现提供了性状焦虑与心脏迷走神经控制减少有关的证据。还需要其他研究来检查迷走神经控制不足是否与焦虑引起的心脏猝死的风险增加有关。

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