Evaluation of the left ventricular systolic function and synchrony in patients with myocardial infarction using real-time three-dimensional echocardiography

Objective To explore the feasibility and accuracy of real-time three-dimensional echocardiography(RT-3DE) in evaluation of the left ventricular systolic function and synchrony in patients with myocardial infarction.Methods Two-dimensional echocardiography(2DE) or RT-3DE was performed on 18 patients with myocardial infarction(the myocardial infarction group) and 16 normal people(the control group).Left ventricular ejection fraction(LVEF),left ventricular end-diastolic volume(LVEDV),left ventricular end-systolic volume(LVESV),the difference(Dif) and standard deviation(SD) of the time to the point with minimal systolic volume(Tmsv) in 16,12,and 6 segments were determined and adjusted by R-R interval(TmsvSD% and TmsvDif%) using real-time three-dimensional echocardiography and QLAB software.LVEDV,LVESV,and LVEF were obtained by 2DE.Results Compared with the control group,LVEF of the myocardial infarction group was decreased(P0.05),while TmsvSD% and TmsvDif% were increased(P0.05).LVEDV and LVESV obtained by RT-3DE were higher than those obtained by 2DE(P0.05),while LVEF by RT-3DE was lower than that by 2DE(P0.05).Conclusion RT-3DE can objectively evaluate the left ventricular systolic function and synchrony in patients with myocardial infarction.TmsvSD-16% and Tmsv-16Dif% may be potential parameters for evaluation of systolic synchrony.