Low-gradient AS is generally seen in patients with low EF; however, a significant percentage of patients with severe AS may present with low-gradient despite preserved LVEF ("paradoxical" low-flow and low-gradient stenosis). In patients with low-gradient AS, clarification of disease severity and...
For the purpose of this state-of-the-art review, a PubMed search of the literature was performed using the terms “aortic stenosis” and “low flow or low gradient or dobutamine.” The search was limited to the title and abstract of full-length articles written in English and published fro...
Low-flow, low-gradient severe aortic stenosis despite normal ejection fraction is associated with severe left ventricular dysfunction as assessed by speckle-tracking echocardiography: a multicenter study.主要由Adda, Jérôme、Mielot, Christopher、Giorg
aortic valve area (AVA) <1 cm2 and/or index iAVA <0.6 cm2/m2 (consistent with severe AS) and the mean gradient (MG) <40 mmHg, consistent with mild/moderate AS. Accurate diagnosis of true severe low flow low gradient AS versus pseudo-severe aortic stenosis is important for ...
Purpose of ReviewAortic stenosis (AS) is one of the most common valvular heart diseases, and aortic valve replacement (AVR) provides both symptomatic and s... KCBANR Alluri - 《Current Cardiology Reports》 被引量: 0发表: 2020年 107 Low-flow low-gradient aortic stenosis: aortic valve area ...
Background Patients with low-flow, low-gradient (LFLG) aortic stenosis (AS) have precarious hemodynamics and are a fragile population for intervention. Quantification of aortic valve calcification (AVC) severity is a critical component of the evaluation for transcatheter aortic valve replacement (TAVR...
doi:10.1001/jamacardio.2018.4320 Key Points Question What outcomes do patients with low-flow, low-gradient aortic stenosis (LFLG AS) and severely depressed left ventricular function (<30%) experience after transcatheter aortic valve replacement (TAVR)? Findings This multicenter registry study of 293 ...
Low Flow Low Gradient Aortic Stenosis with preserved LVEF:低流量低梯度的主动脉瓣狭窄和左 热度: 液压阀_流量控制阀工作原理 热度: Features LowFlowDVValve • 1 ⁄2"diameterseatallowsdiaphragmtolift higherandpasslargerparticlesatlowflows •Patent-pendingdoubleknifediaphragm ...
The diagnostic role of "acceleration time" measurement in patients with classical low flow low gradient aortic stenosis with reduced left ventricular eject... In our study, we aimed to assess the role of acceleration time (AT), ejection time (ET), and AT/ET ratio to distinguish between true...
AVA = aortic valve area; BSA = body surface area; MPG = transvalvular mean pressure gradient; HG-AS = high-gradient aortic stenosis; LFLG-AS = low-flow, low-gradient aortic stenosis; LVEF = left ventricular ejection fraction; pLFLG-AS = paradoxical low-flow, low-gradient aortic stenosis;...