Value of cardiac magnetic resonance feature tracking technique in evaluating cardiac function during chemotherapy in breast cancer patients
Objective:To investigate the value of cardiac magnetic resonance feature tracking(CMR-FT)in evaluating early subclinical changes in cardiac function during chemotherapy in breast cancer patient.Materials and Methods:This was a prospective study,in which 73 breast cancer patients were enrolled.All subjects underwent a once-time 1.5 T cardiac magnetic resonance examination with a scan sequence heart cinema.According to different chemotherapy cycles,breast cancer patients were divided into three groups,i.e.,baseline group(no chemotherapy yet;n=20),early chemotherapy group(3-4 cycles;n=27),and late chemotherapy group(7-8 cycles;n=26).Conventional cardiac function parameters and myocardial strain parameter including left ventricular ejection fraction(LVEF),left ventricular end-diastolic volume index(LVEDVI),global radial strain(GRS),global longitudinal strain(GLS),and global circumferential strain(GCS)were obtained using CVI42 post-processing software.Normality tests were performed,moreover,a one-way analysis of variance was to compare intergroup differences.Pearson correlation coefficient was utilized to analyze the relationship between cardiac function and myocardial strain data,with statistical significance set at P<0.05.Results:When compared to the baseline group,a pronounced decrease was detected in the cardiac function indexes of LVEF,right ventricular ejection fraction(RVEF),and stroke volume index(SVI)in the late chemotherapy group(all P<0.05),while the main myocardial strain indexes GRS,GCS,and GLS in the early chemotherapy group(all P<0.05).Correlation analysis revealed a linear positive correlation between LVEF,RVEF,SVI and GRS,GCS,GLS respectively(r=0.26-0.45,all P<0.05).LVMI,LVEDVI,LVESVI,and cardiac index(CI)showed no significant correlation with myocardial strain data(all P>0.05).Repeatability analysis indicated good inter-and intra-observer agreement for GRS,GCS,and GLS measurements.Conclusions:Compared to conventional cardiac function indexes,the cardiac strain index measured by CMR-FT technology is more sensitive in detecting subclinical cardiac function injury in breast cancer patients,providing an opportunity for early prevention and treatment of severe cardiac damage.
breast cancerchemotherapycardiotoxicitymyocardial straincardiac magnetic resonancemagnetic resonance imaging
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