Results 51 to 60 of about 33,320 (244)

Comprehensive assessment of the aortic valve in critically ill patients for the non-cardiologist. Part I: Aortic stenosis of the native valve

Anaesthesiology Intensive Therapy, 2021
Aortic stenosis (AS) causes left ventricular outflow obstruction. Severe AS has major haemodynamic implications in critically ill patients, in whom increased cardiac output and oxygen delivery are often required.
Jeroen Walpot, Guy L. Vermeiren, Amar Al Mafragi, Manu L.N.G. Malbrain   +3 more
doaj   +1 more source

Imaging of Low-Gradient Severe Aortic Stenosis

JACC: Cardiovascular Imaging, 2013
Although most patients with severe aortic stenosis (AS) have high peak velocity and mean transvalvular gradient, there is a subset of patients with low-flow, low-gradient severe AS (LGSAS). Assessment and management of such patients can be difficult and dobutamine echocardiography has been recommended to distinguish those with pseudo-AS (low calculated
Tandon, Anumeha, Grayburn, Paul A.
openaire   +2 more sources

Benefit of Transcatheter Aortic Valve Replacement in Patients With Paradoxical Low-Flow Low-Gradient Versus High-Gradient Aortic Stenosis and Preserved Left Ventricular Function

Circulation. Cardiovascular Interventions, 2021
Background: There is conflicting data regarding transcatheter aortic valve replacement in patients with paradoxical low-flow, low-gradient aortic stenosis (pLFLG-AS).
Wassim Mosleh, Mostafa R. Amer, Y. Ding, M. Megaly, J. Mather, S. Mcmahon, A. Pershad, R. McKay, Bhaskar Arora   +8 more
semanticscholar   +1 more source

Surgery for severe aortic stenosis with low transvalvular gradient and poor left ventricular function – a single centre experience and review of the literature

Journal of Cardiothoracic Surgery, 2007
Background A retrospective comparative study was designed to determine whether the transvalvular gradient has a predictive value in the assessment of operative outcome in patients with severe aortic stenosis and poor left ventricular function.
Vchivkov Ilja, Ghodsizad Ali, Borowski Andreas, Gams Emmeran   +3 more
doaj   +1 more source

Comparison of Magnetic Resonance Imaging and Cardiac Catheterization in Patients with Suspected Severe Aortic Stenosis

Acta Medica, 2008
Objective. Magnetic resonance imaging (MRI) is a novel technique used in the assessment of aortic stenosis. The aim of the study was to compare MRI and cardiac catheterization (CAT) that is still considered to be a “golden standard” in this indication ...
Miroslav Solař, Ludovit Klzo, Jan Žižka, Jiří Ceral, Josef Bis   +4 more
doaj   +1 more source

The clinical significance of the incorporation of tissue Doppler imaging into low-dose Dobutamine stress echocardiography in patients with aortic stenosis prior to Transcatheter aortic valve implantation

BMC Cardiovascular Disorders, 2020
Background Low-dose dobutamine stress echocardiography (DSE) is indicated in patients with low flow (stroke volume index [SVi] 
Sahrai Saeed, Joerg Kellermair, Jon Herstad, Øyvind Bleie   +3 more
doaj   +1 more source

Sigmoid isostiffness-lines: An in-vitro model for the assessment of aortic stenosis severity

Frontiers in Cardiovascular Medicine, 2022
IntroductionThe aortic valve opening area (AVA), used to quantify aortic stenosis severity, depends on the transvalvular flow rate (Q). The currently accepted clinical echocardiographic method assumes a linear relation between AVA and Q.
Eric Buffle, Eric Buffle, Michael Stucki, Michael Stucki, Shaokai Zheng, Maxime Chiarelli, Christian Seiler, Dominik Obrist, Stefano F. de Marchi   +8 more
doaj   +1 more source

Dobutamine Challenge for Low-Gradient Aortic Stenosis [PDF]

Circulation, 2002
In adults with valvular aortic stenosis (AS), valve replacement is recommended in the presence of symptoms and severely reduced aortic valve area (AVA).1 In such patients, valve replacement improves symptoms and survival, even in the setting of left ventricular (LV) dysfunction.
Paul A. Grayburn, Eric J. Eichhorn
openaire   +1 more source

Impact of atrial fibrillation in clinical outcomes of low gradient aortic stenosis

European Heart Journal, 2022
Aortic stenosis (AS) is the most common significant valvular heart disease in developed countries. A significant portion of the AS populations have low-gradient AS (LGAS), defined as aortic valve area ≤1.0 cm2 and a trans-aortic mean systolic ...
N. Kolluri, D. Oğuz, C. Scott, J. Crestanello, V. Nkomo   +4 more
semanticscholar   +1 more source

Clinical Value of Stress Transaortic Flow Rate During Dobutamine Echocardiography in Reduced Left Ventricular Ejection Fraction, Low-Gradient Aortic Stenosis: A Multicenter Study

Circulation Cardiovascular Imaging, 2021
Supplemental Digital Content is available in the text. Background: Low rest transaortic flow rate (FR) has been shown previously to predict mortality in low-gradient aortic stenosis.
A. Vamvakidou, M. Annabi, P. Pibarot, E. Płońska-Gościniak, A. Almeida, E. Guzzetti, A. Dahou, I. Burwash, M. Koschutnik, P. Bartko, J. Bergler-Klein, J. Mascherbauer, S. Orwat, H. Baumgartner, J. Cavalcante, Fausto J. Pinto, T. Kukulski, J. Kasprzak, M. Clavel, F. Flachskampf, R. Senior   +20 more
semanticscholar   +1 more source