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首页> 外文期刊>The American Journal of Cardiology >Resolving Apparent Inconsistencies Between Area, Flow, and Gradient Measurements in Patients With Aortic Valve Stenosis and Preserved Left Ventricular Ejection Fraction
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Resolving Apparent Inconsistencies Between Area, Flow, and Gradient Measurements in Patients With Aortic Valve Stenosis and Preserved Left Ventricular Ejection Fraction

机译：解决主动脉瓣狭窄患者的面积，流动和梯度测量之间的明显不一致，并保存左心室喷射分数

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Inconsistencies between area (aortic valve area [AVA])-flow-gradient are common during the echocardiographic assessment of aortic stenosis (AS). This study was conducted to investigate the importance of these inconsistencies and the impact of 3 methods to resolve these inconsistencies. The study population consisted of 327 patients (age: 76.3 +/- 8.6 years, 49.5% males) with severe AS (SAS) (AVA = 1 cm(2)) and preserved left ventricular ejection fraction (= 50%). Inconsistent findings between AVA, flow, and mean gradient (MG) were observed in 78 (23.9%) patients with low flow and a high MG, 52 (15.9%) patients with normal flow and a low MG, and 37 (113%) patients with a low flow and a low MG. Using stroke volume index by catheterization for AVA recalculation showed the greatest effect to resolve inconsistencies in the low flow and a high MG group (85%). Decreasing the AVA cut-off values for SAS to = 0.8 cm(2) resulted in a shift from SAS to moderate AS in 36 patients (69%) in the normal flow and a low MG. Indexing AVA to body surface area had only a minor impact on reclassification. In conclusion, in patients with SAS and preserved left ventricular ejection fraction, the majority of area-flow-gradient inconsistencies at echocardiography can be resolved by correcting errors in stroke volume index measurements by alternative techniques and by redefining the cut-off.value for SAS to = 0.8 cm(2). (C) 2017 Elsevier Inc. All rights reserved.
机译：区域之间的不一致（主动脉瓣膜区域[AVA]） - 流量梯度在主动脉狭窄的超声心动图评估期间常见于（AS）。进行该研究以调查这些不一致的重要性以及3种方法对这些不一致的影响。该研究人群由327名患者（年龄：76.3 +/- 8.6岁，49.5％雄性）组成，具有严重的（SAS）（AVA = 1cm（2））并保存左心室射血分数（＆ = 50％） ）。在78名（23.9％）低流量和高镁（15.9％）患者的患者中观察到AVA，流动和平均梯度（Mg）之间的发现不一致的调查结果，患有正常流动和低mg，37例（113％）流量低的患者和低mg。通过导尿率指数用于AVA重新计算的激动率指数显示最大的效果，以解决低流量和高Mg组（85％）的不一致。将SAS的AVA截止值降低至＆ = 0.8cm（2）导致从SAS在36名患者中的正常流量和低mg中的36例（69％）转移到中等。将AVA索引到体表面积仅对重新分类产生轻微影响。总之，在SAS和保存的左心室喷射部分患者中，超声心动图中的大多数区域流动梯度不一致可以通过替代技术校正行程卷指数测量的误差来解决，并通过重新定义切断。为SAS进行重新定义。 ＆ = 0.8 cm（2）。 （c）2017年Elsevier Inc.保留所有权利。

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