NON-INVASIVE ASSESSMENT OF DYNAMIC OBSTRUCTION WITH CONTINUOUS-WAVE DOPPLER

肥厚型心肌病(HCM)患者可能出现 室壁内压差作为动态主动脉下病变的表现 障碍物。一种非侵入性测量梯度的技术是 非常适合重复评估存在和 梗阻程度。要确定CONTINUATION的用途，请执行以下操作 波多普勒法评价左室流出道 肥厚性心肌病患者的梯度，我们同时进行了 CW和压力梯度的测量。 这项研究的结果支持使用连续波多普勒作为一种 一种可靠的测量脑室内压差的技术 肥厚型心肌病。然而，在重症患者中 梗阻流出道特别窄，流速很高 二尖瓣反流可能导致对二尖瓣反流 主动脉下梗阻的程度。

Patients with hypertrophic cardiomyopathy (HCM) may present intraventricular gradients as expressions of dynamic subaortic obstruction. A non-invasive technology to measure the gradient is highly desirable for repetitive assessment of the presence and magnitude of obstruction. To determine the utility of continuous wave Doppler (CW) in assessing the left ventricular outflow tract gradient in patients with HCM, we performed simultaneous measurements of CW and pressure gradients. The results of this study support the use of CW Doppler as a reliable technique to measure the intraventricular gradients in hypertrophic cardiomyopathy. However, in patients with severe obstruction a particularly narrow outflow tract and a high velocity jet of mitral regurgitation may result in misinterpretation of the magnitude of subaortic obstruction.