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Echocardiographic Evaluation of Chronic Aortic Regurgitation: Comparison With Cardiac Magnetic Resonance and Implications for Guideline Recommendations.
JACC: Cardiovascular Imaging ( IF 12.8 ) Pub Date : 2024-10-30 , DOI: 10.1016/j.jcmg.2024.08.013
Rowa Attar,Maan Malahfji,Clara Angulo,Duc T Nguyen,Edward A Graviss,Dipan J Shah,William A Zoghbi

BACKGROUND Guidelines for echocardiographic evaluation of aortic regurgitation (AR) have not been validated against an independent quantitative standard. OBJECTIVES The aim of this study was to evaluate the accuracy of the ASE (American Society of Echocardiography) AR guidelines against cardiac magnetic resonance (CMR) and to develop simplified approaches for detection of significant AR. METHODS Patients with AR underwent echocardiography and CMR <4 hours apart. AR severity was graded according to ASE guidelines. Quantitation of regurgitant volume (RegV) was performed with pulsed Doppler at the mitral annulus and right ventricular outflow compared with left ventricular (LV) outflow, and with proximal isovelocity surface area. RESULTS The authors studied 81 patients; median age was 52 years, and 58% had a bicuspid aortic valve. According to echo, 35 (43%) patients had mild AR, 18 (22%) moderate, 12 (15%) moderate to severe, and 16 (20%) had severe AR. The area under the curve (AUC) for detection of severe AR by CMR using ASE grading was 0.9 (82.4% sensitivity and 96.9% specificity). Feasibility of RegV quantitation was >88% using either echo volumetric method, and it was low for proximal isovelocity surface area (37%). The highest accuracy for echo parameters against CMR was seen with vena contracta width, jet width, and LV end-diastolic volume index (AUC: 0.86-0.89); pressure half-time had the lowest accuracy. Without RegV quantitation, a vena contracta width ≥0.5 cm and indexed LV end-diastolic volume ≥82 mL/m2 had 95.5% positive predictive value and 87.5% negative predictive value for identifying ≥moderate to severe AR by CMR (AUC: 0.89). CONCLUSIONS The ASE guidelines display very good performance in identifying significant AR. A simplified approach using vena contracta width and LV volumes can be used to reliably identify significant AR. Further validation of the findings in larger cohorts and against clinical outcomes is needed.

中文翻译:


慢性主动脉瓣反流的超声心动图评估:与心脏磁共振的比较及其对指南建议的意义。



背景 主动脉瓣反流 (AR) 超声心动图评估指南尚未根据独立的定量标准进行验证。目的 本研究的目的是评估 ASE (美国超声心动图学会) AR 指南针对心脏磁共振 (CMR) 的准确性,并开发检测显着 AR 的简化方法。方法 AR 患者间隔 4 小时接受超声心动图和 CMR <。根据 ASE 指南对 AR 严重程度进行分级。与左心室 (LV) 流出道相比,在二尖瓣环和右心室流出处用脉冲多普勒对反流容积 (RegV) 进行定量,并且具有近端等速表面积。结果 作者研究了 81 例患者;中位年龄为 52 岁,58% 患有二叶式主动脉瓣。根据 echo,35 例 (43%) 患者患有轻度 AR,18 例 (22%) 患有中度 AR,12 例 (15%) 患有中度至重度 AR,16 例 (20%) 患有重度 AR。使用 ASE 分级通过 CMR 检测重度 AR 的曲线下面积 (AUC) 为 0.9 (敏感性 82.4% 和特异性 96.9%)。使用任一回波体积法定量 RegV 的可行性为 >88%,并且近端等速表面积 (37%) 的可行性较低。收缩静脉宽度、射流宽度和 LV 舒张末期容积指数 (AUC: 0.86-0.89) 的回声参数对 CMR 的准确性最高;压力半衰期的精度最低。在没有 RegV 定量的情况下,收缩静脉宽度 ≥0.5 cm 和 LV 舒张末期索引体积 ≥82 mL/m2 对通过 CMR 识别≥中度至重度 AR 的阳性预测值和 87.5% 阴性预测值 (AUC: 0.89)。结论 ASE 指南在识别显著 AR 方面表现出非常好的表现。 使用收缩静脉宽度和 LV 体积的简化方法可用于可靠地识别显着的 AR。需要在更大的队列中进一步验证这些发现并对照临床结局。
更新日期:2024-10-30
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