Study on ultrasonic evaluation vector flow imaging of left ventricular segmental blood flow changes in the structure of the pa-tients with myocardial infarction

ZHA NG Yun; WA NG Pei

Abstract：Objective To evaluate the flow structure changes of left ventricular myocardial infarction segments by vector flow mapping (vector flow mapping ,VFM ) and to provide the basis for the diagnosis of myocardial infarction .Methods We selected 42 cases of old myocardial infarction from January 2012 to may 2013 May in our hospital as the study group , and 30 healthy subjects as control group .VFM was used to evaluate blood flow parameters of groups .Results No signifi-cant differences between the two groups in age ,body surface area ,heart rate ,EDV ,ESV of study group were significant-ly higher than that in control group ( P > 0 .05) .LVEF was significantly lower than that of the control group ( P <0.01) .The systolic left ventricular long axis ,apical four chamber of each segment of TF peak time between too groups were no significant difference ( P >0 .05) ,the diastolic left ventricular long axis ,apical four chamber of each segment of TF peak time in the sludy group was significantly longer than that of the control group ( P<0 .05) .The systolic segmen-tal positive flow ,total flow rate ,positive negative total flow and total flow rate were shown no statistical difference ( P>0 .05) ,the diastolic basal segment ,middle segment positive flow ,total flow and total flow rate in the sludy group was sig-nificantly lower than that of control group ( P<0 .05) .Conclusion VFM can image in any fault ,evaluate multiple range of the heartbeat cycle arbitrary phase changes in blood flow to the heart of each section ,offer a more comprehensive under-standing on the flow structure of heart in patients with myocardial infarction ,and provide a strong basis for diagnosis , prognosis and rehabilitation of patients with myocardial infarction condition .