【摘要】 目的 探討急性腦梗死對心臟自主神經活性的影響。 方法 Wistar大鼠32只隨機分為正常組、假手術組和腦梗死組，腦梗死組用線栓法行右側大腦中動脈阻塞。腦梗死組和假手術組于術前及術后24 h作心率變異性（HRV）檢測，同時檢測正常組HRV，將3組的HRV指標進行比較。實驗終點取各組心肌組織檢測兒茶酚胺和神經肽Y（NPY），進行組間比較。 結果 術后24 h腦梗死組和正常組、假手術組相比，竇性心搏間期標準差、均方根，總功率譜、高頻功率譜（HF）、低頻功率譜（LF）降低，差異有統計學意義。3組比較LF/HF和分數維無明顯差異。腦梗死組心肌組織去甲腎上腺素（NA）和NPY高于正常組和假手術組。 結論 腦梗死引起心臟自主神經總活性降低、自主神經功能受損，自主神經末梢去甲腎上腺素和NPY的異常分泌可能是重要的原因。
【Abstract】 Objective To investigate the effect of acute cerebral infarction on cardiac autonomic nervous activity. Methods A total of 32 Wistar rats were divided into normal group, sham operation group and infarction group by random. Experimental cerebral infarction in Wistar rats was induced by intraluminal occlusion of middle cerebral artery. About 24 hours after the occlusion or 24 hours after sham operation, the heart rate variability (HRV) sequences were measured, and the HRV values in the three groups were compared. The levels of catecholamine and neuropeptide (NPY) in myocardium were measured. Results At the 24th hour after the occlusion, the standard deviation and root mean square standard deviation of R-R interval, the total power, high frequency (HF) and low frequency (LF) in infarction group were lower than those in normal and sham operation group. LF/HF and fractal dimension did not differ much among the three groups. The levels of noradrenaline and NPY in myocardium in infarction group were higher than those in the other groups. Conclusion It is suggested that acute cerebral infarction may cause the decrease of autonomic nervous activity and damage of the autonomic nervous function; the abnormal secretion of noradrenalin in autonomic nerve ending and NPY may be the important reasons.
引用本文： 王蕾,李長清,胡長林. 實驗性腦梗死對大鼠心率變異性的影響. 華西醫學, 2011, 26(3): 344-346. doi: 復制