心血管磁共振特征追踪技术诊断早期高血压性心脏病

Cardiovascular magnetic resonance feature tracking technique in diagnosis of early hypertensiveheart disease

目的探讨心血管磁共振特征追踪(CMR-FT)技术对早期高血压性心脏病(HHD)的诊断价值。方法选取54例HHD患者,其中26例左心室射血分数(LVEF)≤50%(LVEF≤50%组),28例LVEF>50%(LVEF>50%组);另选40名健康志愿者作为对照组。行心血管磁共振(CMR)检查,检测各项心功能参数及整体纵向应变(GLS)。结果3组间左心室舒张末期容积(LVEDV)、左心室收缩末期容积(LVESV)、每搏输出量(SV)、LVEF、心输出量(CO)、心指数(CI)、心率(HR)、左心室收缩期质量及舒张期质量、GLS差异均有统计学意义(P均<0.05)。GLS与LVEDV、LVESV、HR、左心室收缩期质量及舒张期质量均呈正相关(r=0.340、0.460、0.284、0.640、0.570,P均<0.01),与SV、LVEF、CO、CI均呈负相关(r=-0.223、-0.516、-0.052、-0.260,P均<0.05)。结论CMR-FT可用于评估左心室功能,有助于早期诊断HHD。

Objective To explore the value of cardiovascular magnetic resonance feature tracking(CMR-FT)in diagnosis of early hypertensive heart disease(HHD).Methods Totally 54 patients with HHD were selected,including 26 patients with left ventricular ejection fraction(LVEF)≤50%(LVEF≤50%group)and 28 LVEF>50%(LVEF>50%group).Forty healthy volunteers were selected in control group.Cardiac magnetic resonance(CMR)was performed to obtain the cardiac function parameters and global longitudinal strain(GLS).Results There were significant differences of left ventricular function parameters,including left ventricular end-diastolic volume(LVEDV),left ventricular end-systolic volume(LVESV),stroke volume(SV),LVEF,cardiac output(CO),cardiac index(CI),heart rate(HR),left ventricular systolic mass(MyoMass[Diast]),diastolic mass(MyoMass[Syst])and GLS among all 3 groups and between each 2 groups(all P<0.05).GLS were positive correlated with LVEDV,LVESV,HR,MyoMass(Diast)and MyoMass(Syst)(r=0.340,0.460,0.284,0.640,0.570,all P<0.01)but negative correlated with SV,LVEF,CO and CI(r=-0.223,-0.516,-0.052,-0.260,all P<0.01).Conclusion CMR-FT can be used to evaluate the left ventricular function,which is helpful for early diagnosis of HHD.