屏气流速电影MRI评价左右心室功能的初步研究

Assessment of cardiac function with breath-hold phase-velocity cine MRI

目的:评价屏气相位流速电影法MRI(phase-velocitycineMRI,PVCMRI)测量心功能方面的价值。方法:应用PVCMRI检查了25例心脏病患者,将流速法测量的左心室搏出量(LVSV)、主动脉峰值流速(APV)、主动脉平均流速(AAV),分别与右心室搏出量(RVSV)、肺动脉峰值流速(PPV)、肺动脉平均流速(PAV)进行均值比较。结果:PVC法所测的左右心室搏出量均值比较差异无显著性,并且具有明显的直线相关关系。肺动脉AV均值要明显大于主动脉AV,并且具有明显的直线相关关系。主动脉PV要明显大于肺动脉PV,两者没有明显直线相关关系。结论:相位流速电影MRI成像可以无创监测心脏、大血管血流动力学改变,准确评价心功能,是一种有价值的检查方法。

Objective： To investigate the value of breath-hold phase velocity cine MRI （PVC MRI）. Methods： 25 patients with cardiac diseases were studied with PVC MRI. 6 cardiac parameters, including LVSV,APV, AAV, and RVSV, PPV,PAV,were measured. Measurements of LVSV,APV,and AAV were compared with RVSV,PPV, PAV respectively. Results：There were no statistically signifi- cant differences between measurements of LVSV and RVSV . Measurements of APV and AAV were significantly large than those of PPV and PAY. Measurements of LVSV and AAV were closely correlated with those of RVSV and PAV. Conchiston： PVC MRI was a useful method for evaluating cardiac function.