Results 161 to 170 of about 768,171 (308)

Three-Dimensional Lagrangian Coherent Structures in Patients with Aortic Regurgitation [PDF]

arXiv
Understanding blood transport in cardiovascular flows is important for managing patients with cardiovascular disease. In this study, three-dimensional Lagrangian coherent structures have been extracted for the first time in both healthy patients and patients with aortic regurgitation.
arxiv  

Double Circulant Matrices [PDF]

arXiv, 2016
Double circulant matrices are introduced and studied. A formula to compute the rank r of a double circulant matrix is exhibited; and it is shown that any consecutive r rows of the double circulant matrix are linearly independent. As a generalization, multiple circulant matrices are also introduced.
arxiv  

Transapical off-pump implantation of artificial mitral neochords in a patient after Bentall procedure - case report

Quality in Sport
The NeoChord DS 1000 system offers a minimally invasive alternative for treating degenerative mitral regurgitation (MR), particularly in high-risk patients with previous aortic surgery.
Bogumił Bocianiak, Paulina Krzemińska, Kacper Kranc, Dominika Munzberger, Damian Ruta, Laura Hamerska, Julia Hamerska, Joanna Antczak, Julia Lipska, Urszula Fenrych, Karolina Wojtczak, Olga Skupińska, Anna Kajka   +12 more
doaj   +1 more source

The Impact of a New “Inverted Arch” Prosthetic Annuloplasty Ring on the Mitral Valve’s 3-D Motion: An Experimental Ex-Vivo Study

Bioengineering, 2019
This experimental study aimed to evaluate the ex-vivo three-dimensional (3-D) motion of the Inverted Arch Ring (IAR), an innovative new design concept for a flexible incomplete annuloplasty prosthesis with an incorporated stabilizing rigid arch that can ...
Philippe Caimmi, Emmanouil Kapetanakis, Carla Beggino, Giovanni Vacca, Elena Grossini, Florian Stratica, Roberto Sacco, Andrea Capponi   +7 more
doaj   +1 more source

Regurgitative Training: The Value of Real Data in Training Large Language Models [PDF]

arXiv
What happens if we train a new Large Language Model (LLM) using data that are at least partially generated by other LLMs? The explosive success of LLMs means that a substantial amount of content online will be generated by LLMs rather than humans, which will inevitably enter the training datasets of next-generation LLMs. We evaluate the implications of
arxiv  

Circulant Tensors with Applications to Spectral Hypergraph Theory and Stochastic Process [PDF]

arXiv, 2013
Circulant tensors naturally arise from stochastic process and spectral hypergraph theory. The joint moments of stochastic processes are symmetric circulant tensors. The adjacency, Laplacian and signless Laplacian tensors of circulant hypergraphs are also symmetric circulant tensors.
arxiv  

Determinants of the Degree of Functional Mitral Regurgitation in Patients With Systolic Left Ventricular Dysfunction: A Quantitative Clinical Study

Circulation, 2000
BackgroundFunctional mitral regurgitation (FMR) occurs with a structurally normal valve as a complication of systolic left ventricular dysfunction (LVD).
S. Yiu, M. Enriquez-Sarano, C. Tribouilloy, J. Seward, A. Tajik   +4 more
semanticscholar   +1 more source

Atrial Fibrillation (AF) and Heart Failure With Preserved Ejection Fraction (HFpEF): Advances and Challenges

Journal of Cardiovascular Electrophysiology, EarlyView.
ABSTRACT This state‐of‐the‐art review is based on the Philippe Coumel Lecture in 2024 (Figure 1). It highlights the confluence of two major cardiovascular epidemics, atrial fibrillation and heart failure, with preserved ejection fraction. In these conditions, advances in electrophysiology and heart failure physiology are intertwined and are integrated ...
Sanjeev Saksena, April Slee, Ranghadham Nagarakanti, Atul Prakash   +3 more
wiley   +1 more source

Síndrome de ALCAPA de presentación neonatal. A propósito de un caso

Cirugía Cardiovascular, 2021
Resumen: Se presenta un caso clínico de ALCAPA neonatal con disfunción ventricular izquierda grave e insuficiencia mitral moderada. El paciente tuvo una buena evolución postoperatoria.
Juan M. Aguilar, Antonio Jiménez, Joaquin Perez-Andreu, Moises Sorlí, Juana Espín, Francisco Castro   +5 more
doaj  

Some (Hopf) algebraic properties of circulant matrices [PDF]

arXiv, 2011
We study some (Hopf) algebraic properties of circulant matrices, inspired by the fact that the algebra of circulant $n\times n$ matrices is isomorphic to the group algebra of the cyclic group with $n$ elements. We introduce also a class of matrices that generalize both circulant and skew circulant matrices, and for which the eigenvalues and ...
arxiv