Tomov I, Savova A, Kŭtova Ts
Vutr Boles. 1989;28(2):35-40.
A correlative study was carried out between the transvalvular aortic gradient determined by continuous wave Doppler echocardiography and by cardiac catheterization (retrograde or transseptal) in 41 patients with proved by invasive methods aortic valvular stenosis of different degree with or without accompanying aortic incompetence (light, moderate or severe). A considerable correlation was found between the transvalvular aortic gradient determined by the two methods (r = 0.75). In spite of that in considerable number of cases there is overestimation or underestimation of the transvalvular aortic gradient determined by Doppler echocardiography compared with the one determined by cardiac catheterization. The overestimation of the transvalvular aortic gradient determined by Doppler echocardiography is due to the accompanying aortic incompetence of greater degree and to the condition that the gradient determined by Doppler echocardiography is maximum instantaneous while the one determined by cardiac catheterization is peak to peak and is principally of lower values. The underestimation of the transvalvular aortic gradient is due to the presence of considerable left ventricular dysfunction and technical faults in the Doppler echocardiographic examination.
对41例经侵入性方法证实患有不同程度主动脉瓣狭窄伴或不伴主动脉瓣关闭不全（轻度、中度或重度）的患者，进行了连续波多普勒超声心动图测定的跨瓣主动脉压差与心导管检查（逆行或经房间隔）测定的跨瓣主动脉压差之间的相关性研究。发现两种方法测定的跨瓣主动脉压差之间存在显著相关性（r = 0.75）。尽管如此，与心导管检查测定的跨瓣主动脉压差相比，在相当数量的病例中，多普勒超声心动图测定的跨瓣主动脉压差存在高估或低估的情况。多普勒超声心动图测定的跨瓣主动脉压差高估是由于伴发的较严重主动脉瓣关闭不全，以及多普勒超声心动图测定的压差是最大瞬时压差，而心导管检查测定的压差是峰峰值且主要为较低值。跨瓣主动脉压差低估是由于存在相当程度的左心室功能障碍以及多普勒超声心动图检查中的技术故障。
