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首页> 外文会议>Computers in cardiology 1995 >Cardiac Nuclear Magnetic Resonance Imaging Compared With Doppler Echocardiography to Estimate Pulmonary Vein and Left Ventricular Diastolic Flow
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Cardiac Nuclear Magnetic Resonance Imaging Compared With Doppler Echocardiography to Estimate Pulmonary Vein and Left Ventricular Diastolic Flow

机译：心脏核磁共振成像与多普勒超声心动图的比较，以估计肺静脉和左心室舒张血流

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We compared cardiac nuclear magnetic resonance imaging (Vectra, 0.5 T) to Doppler echocardiography in the non invasive estimate of intracardiac flow patterns. By comparing NMR signal intensity curves and Doppler flow patterns within the left ventricle, we obtained a relation between Doppler velocities and NMR signal intensities in absolute units (100 AU =7 cm/sec, r=0.74). This allowed the estimate of flow velocity of the pulmonary veins in normal subjects and patients with previous infarction (most of them without technically feasible evaluation of pulmonary vein inflow velocity to the left atrium). Moreover, in 8 patients with left ventricular aneurysm, an estimate of flow within the lesion was possible; 30% of them had technically/ unsatisfactory Doppler flow velocity estimates. NMR signal intensities were very low throughout the cardiac cycle and correlated to thrombus formation (p<0.001 for maximum systolic AU<100 and p<0.03 for maximum diastolic AU<200).
机译：我们在心脏内血流模式的非侵入性评估中，将心脏核磁共振成像（Vectra，0.5 T）与多普勒超声心动图进行了比较。通过比较左心室内的NMR信号强度曲线和多普勒流型，我们获得了绝对单位（100 AU = 7 cm / sec，r = 0.74）的多普勒速度与NMR信号强度之间的关系。这样就可以估算正常受试者和先前有梗塞的患者的肺静脉流速（大多数患者在技术上无法评估左心房的肺静脉流速）。此外，在8例左室动脉瘤患者中，可以估计病变内的血流。他们中有30％的人对多普勒流速的估算在技术上/不令人满意。在整个心动周期中，NMR信号强度非常低，并且与血栓形成相关（对于最大收缩期AU <100，p <0.001；对于最大舒张期AU <200，p <0.03）。

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