Results 31 to 40 of about 11,576,054 (206)

Aortic valve chordae tendineae: A rare cause of aortic stenosis

Radiology Case Reports, 2023
We describe a rare case of severe low-flow, low-gradient aortic stenosis due to a calcified aortic valve chordae tendineae. The chordae was captured on cardiac computed tomography (CT) using advanced 3-dimensional image reconstruction to reveal the ...
Cara E. Saxon, MD, Tessa S.S. Genders, MD, PhD, Robert A. Quaife, MD, S. James Chen, PhD, Joseph M. Burke, MD, Erin M. McGuinn, MD   +5 more
doaj   +1 more source

Association of atrial fibrillation with survival in patients with low-flow low-gradient aortic stenosis with preserved ejection fraction undergoing TAVI. [PDF]

, 2023
AIMS There is limited evidence on the prognostic significance of atrial fibrillation (AF) in patients with low flow, low gradient aortic stenosis with preserved ejection fraction (LFLG-pEF AS).
David Reineke, Lanz, Jonas, Windecker, Stephan, Praz, Fabien, Thomas Pilgrim, Stortecky, Stefan, Fabien Praz, Jonas Lanz, Nakase, Masaaki, Tomii, Daijiro, Stephan Windecker, Heg, Dierik Hans, Daijiro Tomii, Reineke, David, Dik Heg, Pilgrim, Thomas, Masaaki Nakase, Stefan Stortecky   +17 more
core   +3 more sources

Investigation of physiological pulsatile flow in a model arterial stenosis using large-eddy and direct numerical simulations [PDF]

, 2012
Physiologicalpulsatileflow in a 3D model of arterialstenosis is investigated by using largeeddysimulation (LES) technique. The computational domain chosen is a simple channel with a biological type stenosis formed eccentrically on the top wall.
Molla, M.M., M.C. Paul, M.M. Molla, Paul, M.C.   +3 more
core   +1 more source

Re-Exploration of Flow Rate in Low-Flow, Low-Gradient Aortic Stenosis. [PDF]

Catheter Cardiovasc Interv
ABSTRACT Background Transaortic flow rate (TFR, mL/s) is an emerging hemodynamic index in aortic stenosis (AS), offering insights beyond stroke volume index (SVi). We evaluated the hemodynamic determinants and prognostic significance of TFR at rest and peak dobutamine stress in patients with ...
Hungerford S, Rye E, Sritharan H, Hansen P, Choong C, Bhindi R.   +5 more
europepmc   +4 more sources

Low “gradient”, low flow aortic stenosis [PDF]

Heart, 2006
Aortic stenosis is thought to have a long, asymptomatic latent phase during which the risk of sudden death is low. In fact symptoms can be revealed by treadmill exercise in a large proportion of apparently asymptomatic patients.1 Patients may limit exercise to avoid symptoms or may fail to recognise the presence of exertional breathlessness or ascribe ...
openaire   +2 more sources

Low-flow/low-gradient aortic stenosis-Still a diagnostic and therapeutic challenge. [PDF]

Clin Cardiol, 2017
Aortic stenosis (AS) is the most frequently observed valvular heart disease. During the symptomatic stage, the rate of death increases dramatically, so that a precise diagnostic approach is taken to guide therapeutic options. Of patients with severe AS, 30% to 50% present with low‐flow/low‐gradient AS (LF/LGAS) status.
Vogelgesang A, Hasenfuss G, Jacobshagen C.   +2 more
europepmc   +5 more sources

Investigation of spiral blood flow in a model of arterial stenosis [PDF]

, 2009
The spiral component of blood flow has both beneficial and detrimental effects in human circulatory system [Stonebridge PA, Brophy CM. Spiral laminar flow in arteries? Lancet 1991; 338: 1360–1].
Paul, M.C., Larman, A.
core   +1 more source

Low-Gradient aortic stenosis; the diagnostic dilemma

Heart Views, 2022
Low-gradient (LG) aortic valve stenosis (AS) constitutes a significant subset among patients with severe aortic stenosis. This entity represents one of the most challenging heart conditions when it comes to diagnosis and management, mainly because of the
Osama Alkhalaila, Mansour Al Shehadat
doaj   +1 more source

Transcatheter aortic-valve replacement for inoperable severe aortic stenosis. [PDF]

, 2012
BACKGROUND: Transcatheter aortic-valve replacement (TAVR) is the recommended therapy for patients with severe aortic stenosis who are not suitable candidates for surgery. The outcomes beyond 1 year in such patients are not known.
Makkar, Raj R, Dewey, Todd M, Pocock, Stuart, Brown, David L, Pichard, Augusto D, Bowers, Bruce, Siegel, Robert J, Smith, Craig R, Webb, John G, Tuzcu, Murat, Moses, Jeffrey W, Williams, Matthew R, Babaliaros, Vasilis C, Thourani, Vinod H, Kapadia, Samir, Svensson, Lars G, Jilaihawi, Hasan, Kodali, Susheel, Bavaria, Joseph E, MD, Fontana, Gregory P, Akin, Jodi J, Douglas, Pamela S, Bavaria, Joseph E, Herrmann, Howard C, Leon, Martin B, PARTNER Trial Investigators, Anderson, William N   +26 more
core   +1 more source

At what flow rate does the aortic valve gradient become severely elevated? Implications for guideline recommendations on aortic valve area cutoffs

Archives of Medical Science, 2021
Introduction Aortic stenosis (AS) is considered severe when the aortic valve area (AVA) is < 1.0 cm 2 and the mean aortic valve gradient (mAVG) exceeds 40 mm Hg.
Ayesha Salahuddin, Wilbert S. Aronow, Daniel M. Spevack   +2 more
doaj   +1 more source