The autonomic nervous system dysfunction has been reported in up to 76% of stroke patients 7 days after an acute stroke. Heart rate variability (HRV) is one of the important indicators reflecting the balance of sympathetic and parasympathetic nerves. Therefore, we performed a systematic literature review of existing literature on the association between heart rate variability and the different types of stroke. We included studies published in the last 32 years (1990 to 2022). The electronic databases MEDLINE and PubMed were searched. We selected the research that met the inclusion or exclusion criteria. A narrative synthesis was performed. This review aimed to summarize evidence regarding the potential mechanism of heart rate variability among patients after stroke. In addition, the association of clinical characteristics of heart rate variability and stroke has been depicted. The review further discussed the relationship between post-stroke infection and heart rate variability, which could assist in curbing clinical infection in patients with stroke. HRVas a noninvasive clinical monitoring tool can quantitatively assess the changes in autonomic nervous system activity and further predict the outcome of stroke. HRV could play an important role in guiding the clinical practice for autonomic nervous system disorder after stroke.

中文翻译：

---

中风后心率变异的临床特征：系统评价。

据报道，高达 76% 的中风患者在急性中风后 7 天出现自主神经系统功能障碍。心率变异性（HRV）是反映交感神经和副交感神经平衡的重要指标之一。因此，我们对有关心率变异性与不同类型中风之间关联的现有文献进行了系统的文献综述。我们纳入了过去 32 年（1990 年至 2022 年）发表的研究。检索了电子数据库 MEDLINE 和 PubMed。我们选择了符合纳入或排除标准的研究。进行了叙事综合。本综述旨在总结有关中风后患者心率变异性潜在机制的证据。此外，还描述了心率变异性和中风的临床特征的关联。该综述进一步讨论了中风后感染与心率变异性之间的关系，这可能有助于遏制中风患者的临床感染。HRV作为一种无创临床监测工具，可以定量评估自主神经系统活动的变化，并进一步预测中风的结局。HRV对脑卒中后自主神经系统疾病的临床实践具有重要指导作用。