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目的探讨植物神经功能与急性心肌梗塞（ＡＭＩ）的关系。方法用５ｍｉｎ节段采样分析的心率功率谱检查方法测定了４０例ＡＭＩ患者（ＡＭＩ组）和４１例正常对照者（对照组）的植物神经功能。结果ＡＭＩ组较对照组高频峰（ＨＦＰ）降低（Ｐ＜０．０１），低频峰（ＬＦＰ）／ＨＦＰ增高（Ｐ＜０．０１）；且于ＡＭＩ后３月时ＨＦＰ仍不能恢复正常；前壁ＡＭＩ患者ＨＦＰ降低明显（Ｐ＜０．０１），ＬＨＰ／ＨＦＰ高于非前壁梗塞者（Ｐ＜０．０１）。结论ＡＭＩ患者迷走神经功能受损，植物神经功能失调，并且前壁ＡＭＩ迷走神经活性低于下、后壁ＡＭＩ患者，ＡＭＩ后迷走神经功能短时间内不能恢复正常，很可能是永久性损害。
Objective To investigate the relationship between autonomic nerve function and acute myocardial infarction (AMI). Methods The autonomic function of 40 patients with AMI (AMI group) and 41 healthy controls (control group) was determined by the heart rate power spectrum test in 5 min. Results Compared with the control group, the AMI group had higher HFP (P <0.01) and LFP / HFP (P <0.01), and HFP still could not return to normal after 3 months of AMI. The HFP decreased significantly in AMI patients (P <0.01), LHP / HFP was higher in non-AMI patients (P <0.01). Conclusions The AMI patients have impaired vagal function and autonomic dysfunction. The anterior wall AMI vagus nerve activity is lower than that of the inferior and posterior wall AMI patients. After AMI, the vagus nerve function can not return to normal within a short time and may be permanent damage.