The effect of level of injury and physical activity on heart rate variability following spinal cord injury
The effect of level of injury and physical activity on heart rate variability following spinal cord injury
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DOI：
10.1080/10790268.2017.1383709
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发表时间：
2019-01-01
影响因子：
1.7
通讯作者：
Chroni, Elisabeth
中科院分区：
文献类型：
--
作者：
Kyriakides, Athanasios;Poulikakos, Dimitrios;Chroni, Elisabeth
目的/背景：评估脊髓损伤(SCI)患者安静状态和体位自主神经刺激时的频域心率变异性(HRV)参数，并探讨不同体力活动对心脏的自主神经影响。设计：横断面研究。方法：前瞻性地从社区招募10名完全性颈脊髓损伤患者和14名完全性下胸脊髓损伤患者，并进一步将其分为静坐和体力活动组，后者定义为前3个月每周有规律的4小时体力活动。16名性别、年龄相匹配的健康人作为对照组。采用快速傅立叶变换，对连续记录的静息和静坐时心率变异性(HRV)的低频(LF)、高频(HF)功率和低频/高频(LF/HF)比值进行测量。结果：SCI患者静息和坐姿时的低频、高频和低频/高频比值均显著低于对照组。坐位动作后，对照组的HF、LF和LF/HF的变化明显大于SCI组，截瘫患者的变化明显大于四肢瘫痪患者。截瘫患者较好的HRV值和增强的迷走神经活动似乎与活动受试者的体力活动类型有关。结论：在这组受试者中，HRV的频谱参数与损伤程度相关。在截瘫患者中，被动站立与较高的HRV值相关。
Objective/Background: To assess frequency domain heart rate variability (HRV) parameters at rest and in response to postural autonomic provocations in individuals with spinal cord injury (SCI) and investigate the autonomic influences on the heart of different physical activities.Design: Cross-sectional study.Methods: Ten subjects with complete cervical SCI and fourteen subjects with complete low thoracic SCI were prospectively recruited from the community and further divided in sedentary and physically active groups, the latter defined as regular weekly 4 hour physical activity for the preceding 3 months. Sixteen healthy individuals matched for sex and age were recruited to participate in the control group. The Low Frequency (LF), High Frequency (HF) powers and the LF/HF ratio of HRV were measured from continuous electrocardiogram (ECG) recordings at rest and after sitting using a fast Fourier transformation.Outcome measures: The LF, HF, and the LF/HF ratio at rest and after sitting.Results: A significant decrease in all HRV parameters in patients with SCI was found compared to controls. The change in HF, LF and LF/HF following sitting maneuver was significantly greater in controls as compared with the SCI group and greater in subjects with paraplegia as compared to subjects with tetraplegia. Better HRV values and enhanced vagal activity appears to be related to the type of physical activity in active subjects with paraplegia.Conclusion: In this cohort of subjects spectral parameters of HRV were associated with the level of the injury. Passive standing was associated with higher HRV values in subjects with paraplegia.