摘要
目的 通过对急性冠脉综合征（ACS）患者心率减速力（DC）特点研究,探讨DC对ACS高危患者的预测价值及临床意义.方法 选择100例ACS患者为ACS组,50例稳定型心绞痛（SAP）患者为SAP组,50例造影正常者为对照组.所有入选者均行24h动态心电图检查,将24h动态心电图经120 Hz数字化自动处理系统转换为以心动周期R-R值为纵坐标的序列图,筛选出减速周期,以选中的减速点为中心计算出X（0）、X（-1）、X（-2）、X（1）,再经过公式DC（ms）=[X（0）＋X（1）-X（-1）-X （-2）]×1/4,计算机自动测定DC.结果 ACS组患者异常DC的发生率明显高于SAP组（P＜0.05）及正常对照组（P＜0.01）;ACS组患者的DC值明显低于SAP组（P＜0.05）及正常对照组（P ＜0.01）.结论 ACS患者的DC减弱.DC值可以直接反映冠心病患者的病变不稳定状态,病情愈严重,迷走神经的保护作用愈低,猝死风险愈高.
Objective By studying the prediction of acute coronary syndrome（ACS） patients at high risk,to discuss the value and clinical significance of the heart rate deceleration force（DC）.Methods 100 ACS patients （ACS group） were enrolled,patients with stable angina pectoris were 50 （SAP group） and normal human controls were 50.All patients were underwent 24 hour dynamic electrocardiogram.The 24 hour dynamic electrocardiogram were converted to system diagram using the heartbeat cycle R-R sequence as ordinate by digital automatic processing of 120 Hz,and the deceleration period was screened out,X（0）,X（-1）,X （-2）,X （1）were calculated using the deceleration point as the center,then the DC by the formula of DC（ms）=[X（0）＋X（1）-X（-1）-X（-2）]×1/4 was calculated automatically.Results The DC was significantly higher in the ACS group than that in SAP group （P＜0.05） and normal control group （P＜0.01）.Conclusion The DC decreased in ACS patients.The value of DC can directly reflect the unstable state in patients with coronary heart disease.The illness is more serious,the protective effect of vagus nerve is lower,the risk of sudden death is higher.
出处
《中国心血管病研究》
CAS
2014年第4期313-315,共3页
Chinese Journal of Cardiovascular Research
关键词
急性冠脉综合征
心率减速力
动态心电图
Acute coronary syndrome
The heart rate deceleration force
24 hour dynamic electrocardiogram
