首页> 外文期刊>Cardiovascular Ultrasound >Flow propagation velocity is not a simple index of diastolic function in early filling. A comparative study of early diastolic strain rate and strain rate propagation, flow and flow propagation in normal and reduced diastolic function
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Flow propagation velocity is not a simple index of diastolic function in early filling. A comparative study of early diastolic strain rate and strain rate propagation, flow and flow propagation in normal and reduced diastolic function

机译:在早期充盈中,血流传播速度不是舒张功能的简单指标。舒张早期应变率和应变率传播,正常舒张功能和减少舒张功能中的血流和血流传播的比较研究

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Background Strain Rate Imaging shows the filling phases of the left ventricle to consist of a wave of myocardial stretching, propagating from base to apex. The propagation velocity of the strain rate wave is reduced in delayed relaxation. This study examined the relation between the propagation velocity of strain rate in the myocardium and the propagation velocity of flow during early filling. Methods 12 normal subjects and 13 patients with treated hypertension and normal systolic function were studied. Patients and controls differed significantly in diastolic early mitral flow measurements, peak early diastolic tissue velocity and peak early diastolic strain rate, showing delayed relaxation in the patient group. There were no significant differences in EF or diastolic diameter. Results Strain rate propagation velocity was reduced in the patient group while flow propagation velocity was increased. There was a negative correlation (R = -0.57) between strain rate propagation and deceleration time of the mitral flow E-wave (R = -0.51) and between strain rate propagation and flow propagation velocity and there was a positive correlation (R = 0.67) between the ratio between peak mitral flow velocity / strain rate propagation velocity and flow propagation velocity. Conclusion The present study shows strain rate propagation to be a measure of filling time, but flow propagation to be a function of both flow velocity and strain rate propagation. Thus flow propagation is not a simple index of diastolic function in delayed relaxation.
机译:背景应变率成像显示左心室的充盈阶段由一波心肌舒张波组成,从基部传播到根尖。应变波的传播速度在延迟松弛中降低。这项研究检查了心肌的应变率传播速度与早期充盈过程中血流传播速度之间的关系。方法对12例正常人和13例高血压和收缩功能正常的患者进行研究。患者和对照组在舒张早期二尖瓣血流测量,舒张早期峰值组织速度峰值和舒张早期峰值应变率方面存在显着差异,显示患者组中的舒张延迟。 EF或舒张期直径无明显差异。结果患者组的应变率传播速度降低,而血流传播速度增加。二尖瓣流E波的应变率传播与减速时间之间存在负相关性(R = -0.57),二尖流E波的应变率传播与流动速度之间存在负相关性(R = -0.57),并且存在正相关性(R = 0.67)二尖峰流速/应变率传播速度与流动传播速度之比)。结论本研究表明应变率传播是填充时间的量度,而流动传播是流速和应变率传播的函数。因此,在延迟松弛中,血流传播不是舒张功能的简单指标。

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