Although echocardiography has traditionally been used to screen and monitor the progression of AS, there can be discordance between measurements in a low-flow state. Such patients may have truly severe AS and potentially derive long-term benefit from aortic valve intervention. Accuratel...
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
Figure 1. Different Patterns of Severe AS According to Flow, Gradient, and LV Geometry The majority (50% to 70%) of patients with severe aortic stenosis (AS) develop left ventricular (LV) hypertrophy with normal LV cavity size and ejection fraction (EF), which allows maintenance of normal ...
For more information visit www.intechopen.com Chapter Low Flow Low Gradient Severe Aortic Stenosis: Diagnosis and Treatment Faeez Mohamad Ali, Vindhya Wilson and Rajesh Nair Abstract Approximately 40% of patients with aortic stenosis (AS) show discordant Doppler-echocardiographic parameters with ...
TAVI for low-flow, low-gradient severe aortic stenosis with preserved or reduced ejection fraction: a subgroup analysis from the German Aortic Valve Registry (GARY). EuroIntervention. 2014;10(7):850-859. doi:10.4244/EIJV10I7A145PubMedGoogle ScholarCrossref 6. Herrmann HC, Pibarot P, Hueter...
(SV) ≤ 35 ml/m2, mean AV gradient < 40 mmHg; n = 30); Group 2: Classical low-flow, low-gradient AS (CLF-LG-AS: EF < 50%, SV ≤ 35 ml/m2, mean AV gradient < 40 mmHg; n = 21); and Group 3: High-gradient AS (HG-AS: EF < or ≥ 50%, mean AV gradient ≥ 40 ...
Many patients with severe aortic stenosis have a "low-flow, low-gradient" aortic stenosis. The management of these patients can be quite difficult, as these patients often show impairment of the left ventricle, which can lead to false measurements of the severity of stenosis and also leads to...
The projected AVA is equal to 0.82 cm2 in this patient, thus confirming the presence of true-severe AS. The patient underwent transcatheter AVR. Dob = dobutamine; MG = mean gradient; Qmean = mean transvalvular flow rate; SV = stroke volume; other abbreviations as in Figure 1. Download: ...
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...
Outcome After Aortic Valve Replacement for Low-Flow/Low-Gradient Aortic Stenosis Without Contractile Reserve on Dobutamine Stress Echocardiography This study investigated whether aortic valve replacement (AVR) is associated with improved survival in patients with severe low-flow/low-gradient aortic st... ...