右室流出道室性早搏联律间期的变异度与心脏超声改变的相关分析

Analysis the Correlation Between the Variation of Ventricular Premature Beat Interval and Echocardiographic Changes in the Right Ventricular Outflow Tract

目的分析右室流出道室性早搏(premature ventricular contractions,PVC)联律间期的变异度(coupling interval variability,CIV),探讨其与患者心脏超声改变的相关性。方法选择2010年6月—2015年6月在与我院合作的某三甲医院收治的起源于右室流出道的PVC患者共116例,测量患者连续三个PVC的联律间期(coupling interval,CI),并计算CIV。对CIV进行分型,CIV≤80 ms为固定型,>80 ms为非固定型。其中非固定型68例,固定型48例。记录患者入院时心脏彩超数据,比较两种类型的CIV与左室射血分数(LVEF),左室舒张末期内径(LVDD)之间的关系。结果非固定型CIV组(CIV>80ms)患者LVEF小于固定型CIV组(CIV≤80 ms),两组之间差异有统计学意义(P<0.05)。非固定型CIV组LVDD大于固定型CIV组,两组之间差异有统计学意义(P<0.05)。结论联律间期不固定的右室流出道PVC其左室射血分数小于联律间期相对固定的,前者更影响左室收缩功能。联律间期不固定的右室流出道PVC其左室舒张末期内径大于联律间期相对固定的,前者更易引起左室结构性的改变。

Objective To analyze the CIV（premature,contractions,PVC,ventricular） interval variability（coupling,interval,variability） in the right ventricular outflow tract,and to investigate the correlation with the echocardiographic changes of the patients.Methods From June 2010 to June 2015 in cooperation with the origin of our hospital admitted to a hospital in the right ventricular outflow tract of PVC patients with a total of 116 cases were measured for three consecutive PVC interval（coupling interval,CI）,and calculate the CIV.The typing of CIV,CIV ≤ 80 ms for fixed type,Ms 80 for non fixed type.Among them,68 cases were fixed type,48 cases were fixed type.The echocardiographic data of patients at admission were recorded to compare the relationship between the two types of CIV and left ventricular ejection fraction（LVEF） and left ventricular end diastolic diameter（LVDD）.Results Non stationary CIV group（CIV 80 ms） were less than LVEF fixed type CIV group（CIV ≤ 80 ms）,there was significant difference between the two groups（P〈0.05）.The CIV in the non fixed group LVDD was larger than that in the fixed group CIV,and the difference between the two groups was statistically significant（P〈0.05）.Conclusion The left ventricular ejection fraction（PVC） of the right ventricular outflow tract is not fixed.The left ventricular ejection fraction is relatively constant,and the left ventricular ejection function is more affected by the left ventricular systolic function.The left ventricular end diastolic diameter of the right ventricular outflow tract PVC,which is not fixed in the LV interval,is larger than the LV interval,and the former is more likely to cause structural changes in the left ventricle.