The Study On The Influence Of The Heart Rate Turbulence In Patients With Acute Myocardial Infarction

Objective:To Explore the variances of the heart rate turbulence in patients with acute myocardial infarction and the accidence of cardiac events in AMI subgroup,study the correlation of four variables included Turbulence onset(TO),Turbulence slope(TS ),Turbulence timing(TT),Turbulence Dynamicis(TD) about the accidence of cardiac events in AMI subgroup, and to assess clinical value of the indices of HRT in patients with the accidence of cardiac events in AMI subgroup.Methods:Ninety-seven patients with AMI(AMI group) and sixty-six healthy controls (control group) were chosen.24 hambulatory electrocardiograph(Holter),ultrasonic cardiogram (UCG) and clinical data were collected and processed to obtain the values of Turbulence onset (TO),Turbulence slope(TS),Turbulence timing(TT),Turbulence Dynamicis(TD).Study the predictive value of the indices of HRT in patient with the accidence of cardiac events in AMI subgroup by Receiver Operating Characteristic(ROC).In order to explore the influence of various indicators of HRT on the AMI patients with he accidence of cardiac events we analyze the correlation between the indices of HRT,between the indices of HRT and traditional prognostic indices including heart variability(HRV),age and mean heart rate(HR).Results:The value of above indices were compared between AMI group and control group,the levels of age and TO in the patients with AMI were significantly higher than those of the controls;the levels of HR,TS were lower than those of the controls.The analysis in AMI subgroup indicates:the levels of age,TO,TS and TT were significantly different;the levels of age and TO in the patients with the accidence of cardiac events in AMI subgroup were significantly higher than those of the controls in AMI subgroup, and the levels of TT,TS were lower than those of the controls in AMI subgroup;the levels of TD,HR,SDNN were not significantly different.AMI groups of related research indicates that, TO and TT and age was positively correlated with TS,TD,SDNN was negatively correlated. The level of TO increased and the levels of TS,TD decreased accompanied with the increase of age;.In the measurement of TO,TS,TD should be taking account the effects of age,TS values of AMI recurrence in patients with the risk of cardiac events could have some predictive value,.When TS Equivalent to2.3ms/RRI,the true-positive rate and true-negative rate were higher than others,it can be a cut-point,it is recommended in patients with AMI as a predictive values,its clinical importance to be further confirmed. Conclusions:Weaken HRT were observed in patients with AMI and the accidence of cardiac events in AMI subgroup.HRT can be used as some predictors in the accidence of cardiac events in AMI subgroup.Detection of the targets of HRT is conducive to early detection of AMI patients with high-risk patients,so give a reference of AMI patients with early recurrence of cardiac events.