The Differences in Ventricular Function and Ventricular Systolic Synchrony in Patients with Different Types of Complete Left Bundle Branch Block
Objective To evaluate the differences of ventricular function and ventricular systolic synchrony in patients with different types of complete left bundle branch block(CLBBB).Methods Adopting a retrospective study,with 85 CLBBB patients admitted to the hospital from February 2021 to December 2023 as the experimental group,and 50 healthy individuals who underwent physical examinations during the same period as the control group,in both groups,conventional ultrasound was used to examine left atrial diameter(LAD),left ventricular end diastolic dimension(LVEDD),left ventricular end diastolic volume(LVEDV),left ventricular ejection fraction(LVEF),tricuspid annular plane systolic excursion(TAPSE),and right ventricular fractional area change(RVFAC).In addition,two-dimensional speckle tracking imaging(2D-STI)technology was used to measure the left ventricular global longitudinal strain(LVGLS),the right ventricular global longitudinal strain(RVGLS),and the standard deviation of strain peak time.The ventricular function indicators(LAD,LVEDD,LVEDV,LVEF,TAPSE,RVFAC)and ventricular systolic synchrony indicators(LVGLS,RVGLS)between the two groups were compared;According to the longitudinal time-strain curve of the left ventricular posterior interventricular septum,the experimental groups were divided into types Ⅰ,Ⅱ,and Ⅲ,and the ventricular function indicators and ventricular systolic synchrony indicators of CLBBB patients with different subtypes were compared.Results The LAD,LVEDD,LVEDV,and standard deviations of strain peak time in the experimental group were higher than those in the control group,while the absolute values of LVEF,TAPSE,RVFAC,LVGLS,and RVGLS were lower than those in the control group,and the differences were statistically significant(P<0.05).The LAD,LVEDD,LVEDV,and standard deviations of strain peak time in patients with type Ⅰ,Ⅱ,and Ⅲ CLBBB showed an increasing trend,while the absolute values of LVEF,TAPSE,LVGLS,and RVGLS showed a decreasing trend,with statistically significant differences(P<0.05);RVFAC showed a decreasing trend,but the difference was not statistically significant(P>0.05).Conclusion The ventricular function of patients with type Ⅰand Ⅱ CLBBB was better than that of type Ⅲ CLBBB,and the left ventricular systolic asynchrony of patients with type Ⅲ CLBBB was more significant than that of patients with type Ⅰ and Ⅱ CLBBB.
万方数据
维普
