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作者:Marie-Annick Clavel , Ian G. Burwash , Philippe Pibarot
来源:[J].JACC: Cardiovascular Imaging(IF 6.164), 2017, Vol.10 (2), pp.185-202
摘要:... The purpose of this paper is to present the role of multimodality imaging in the diagnostic and therapeutic management of this challenging entity referred to as low-gradient AS . Doppler-echocardiography is critical to determine the subtype of low-gradient AS: that is, c...
作者:Victoria Delgado , Marie-Annick Clavel , Rebecca T. Hahn ...
来源:[J].JACC: Cardiovascular Imaging(IF 6.164), 2019, Vol.12 (2), pp.267-282
摘要:Abstract(#br)Up to 40% of patients with aortic stenosis (AS) present with a “discordant grading” usually referred to as “low-gradient AS.” This article presents a step-by-step integrative approach overview of the utility, limitations, and complementary role of the dif...
作者:Calvin W.L. Chin , Hwan J. Khaw , Elton Luo ...
来源:[J].Canadian Journal of Cardiology(IF 3.122), 2014, Vol.30 (9), pp.1064-1072
摘要:... Finally the effect of these modified AVA measurements and novel thresholds on the number of patients with small-area low-gradient AS was investigated.(#br)Results(#br)Compared with MRI, echocardiography underestimated LVOT area (n = 40; −0.7 cm 2 ; 95% confidence inter...
作者:William B. Cutting , Anthony A. Bavry
来源:[J].Cardiovascular Revascularization Medicine, 2019, Vol.20 (3), pp.197-201
摘要:... These latter types can present as either low ejection fraction with low-gradient AS (stage D2) or normal ejection fraction with low-gradient AS (stage D3). Determining the true severity of disease within these categories has proved difficult. In this review we illustrate bot...
作者:Darryl P. Leong , Stephen Pizzale , Michelle J. Haroun ...
来源:[J].Journal of the American Society of Echocardiography(IF 4.277), 2016, Vol.29 (2), pp.158-165
摘要:Background(#br)Low-flow low-gradient aortic stenosis (AS) is a predictor of worse outcome compared with normal-flow AS. Although depressed left ventricular ejection fraction (LVEF) is associated with low flow, there is less evidence to support the role of other indices of car...
作者:João L. Cavalcante , Shasank Rijal , Andrew D. Althouse ...
来源:[J].Journal of the American Society of Echocardiography(IF 4.277), 2016, Vol.29 (4), pp.325-333
摘要:Background(#br)Patients with low left ventricular ejection fractions and low-flow, low-gradient aortic stenosis (AS) represent a challenging cohort with high morbidity and mortality. The prevalence and clinical impact of right ventricular dysfunction (RVD) on risk stratifica...
作者:Joanna Chikwe , Lori B. Croft , Andrew B. Goldstone ...
来源:[J].The American Journal of Cardiology(IF 3.209), 2009, Vol.104 (12), pp.1717-1721
摘要:The present study was designed to test the hypothesis that low-ejection fraction (EF), low-gradient aortic stenosis (AS) is a predictor of major morbidity after aortic valve replacement (AVR). We retrospectively analyzed prospectively collected data from 597 consecutive patients...
作者:Burwash I G , Lortie M , Pibarot P ...
来源:[J].Heart (British Cardiac Society), 2008, Vol.94 (12), pp.1627-33
摘要:...(#br)OBJECTIVES(#br)To investigate whether myocardial blood flow (MBF) and MFR differ in low-flow, low-gradient AS depending on whether there is underlying true-severe AS (TSAS) or pseudo-severe AS (PSAS).(#br)METHODS(#br)In 36 patients with low-flow, low-gradient AS, dynamic ...
作者:Jean-Luc Monin , Mehran Monchi , Matthias E.W. Kirsch ...
来源:[J].European Heart Journal(IF 14.097), 2007, Vol.28 (21), pp.2620-2626
摘要:Aims To assess the prognostic impact of prosthesis-patient mismatch (PPM) in a large consecutive series of patients operated for low-gradient aortic stenosis (AS). Methods and results Outcomes after surgery for low-gradient AS were prospectively assessed in 152 consecutive patien...
作者:Kusunose Kenya , Yamada Hirotsugu , Nishio Susumu ...
来源:[J].Circulation. Cardiovascular imaging, 2017, Vol.10 (10)
摘要:BACKGROUND(#br)The projected aortic valve area (AVAproj) at a normal transvalvular flow rate using dobutamine is helpful to determine the actual severity of aortic stenosis (AS) and to predict risk of adverse events in low-gradient AS cases with unclear surgical ind...

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