Exact Diagonalization of SU(N) Fermi-Hubbard Models.

We show how to perform exact diagonalizations of SU(N) Fermi-Hubbard models on L-site clusters separately in each irreducible representation (irrep) of SU(N). Using the representation theory of the unitary group U(L), we demonstrate that a convenient orthonormal basis, on which matrix elements of the Hamiltonian are very simple, is given by the set of semistandard Young tableaux (or, equivalently, the Gelfand-Tsetlin patterns) corresponding to the targeted irrep. As an application of this color factorization, we study the robustness of some SU(N) phases predicted in the Heisenberg limit upon decreasing the on-site interaction U on various lattices of size L≤12 and for 2≤N≤6.

Prophylactic epicardial pacemaker implantation in tricuspid valve replacement.

Objectives: Patients undergoing surgical tricuspid valve replacement (TVR) are at high risk of atrioventricular conduction disorders. Because implanting a lead through the tricuspid bioprosthesis is discouraged, the patients who undergo TVR in our centre are usually given a prophylactic epicardial pacemaker. Our aim was to assess the benefits and risks of this strategy.

Management and outcomes of carcinoid heart disease with liver metastases of midgut neuroendocrine tumours.

Objective: Despite recent advances in surgical and interventional techniques, knowledge on the management of carcinoid heart disease (CHD) remains limited. In a cohort of patients with liver metastases of midgut neuroendocrine tumours (NETs), we aimed to describe the perioperative management and short-term outcomes of CHD.

Methods: From January 2003 to June 2022, consecutive patients with liver metastases of midgut NETs and severe CHD (severe valve disease with symptoms and/or right ventricular enlargement) were included at Beaujon and Bichat hospitals.

Elucidating tricuspid Doppler signal interpolation and its implication for assessing pulmonary hypertension.

Doppler echocardiography plays a central role in the assessment of pulmonary hypertension (PAH). We aim to improve quality assessment of systolic pulmonary arterial pressure (SPAP) by applying a cubic polynomial interpolation to digitized tricuspid regurgitation (TR) waveforms. Patients with PAH and advanced lung disease were divided into three cohorts: a derivation cohort ( = 44), a validation cohort ( = 71), an outlier cohort ( = 26), and a non-PAH cohort ( = 44).

Extracorporeal membrane oxygenation network organisation and clinical outcomes during the COVID-19 pandemic in Greater Paris, France: a multicentre cohort study.

Background: In the Île-de-France region (henceforth termed Greater Paris), extracorporeal membrane oxygenation (ECMO) for severe acute respiratory distress syndrome (ARDS) was considered early in the COVID-19 pandemic. We report ECMO network organisation and outcomes during the first wave of the pandemic.

Methods: In this multicentre cohort study, we present an analysis of all adult patients with laboratory-confirmed SARS-CoV-2 infection and severe ARDS requiring ECMO who were admitted to 17 Greater Paris intensive care units between March 8 and June 3, 2020.

3D-printed suture guide for thoracic and cardiovascular surgery produced during the COVID19 pandemic.

Emergency 3D-printing of medical devices came out as a potential solution to tackle shortages during the COVID-19 pandemic. Manufacturing medical devices in small series within hospitals is an exciting perspective in crisis management. Health professionals and additive manufacturing technology are ready for this revolution but regulative adaptations are still required.

Surgical management of iatrogenic coronary artery perforations: when percutaneous treatment fails.

Coronary perforation is a rare complication of percutaneous coronary interventions and a challenging scenario which imposes prompt recognition and treatment. Although it may be successfully managed percutaneously, a surgical treatment may be preferable in some cases. We report the case of a patient with a coronary perforation with initial percutaneous treatment complicated with extravascular implantation of a covered stent and liver laceration, who was succesfully treated by cardiac surgery.

Haldane Gap of the Three-Box Symmetric SU(3) Chain.

Motivated by the recent generalization of the Haldane conjecture to SU(3) chains [Lajkó et al., Nucl. Phys.

Timing of β-Blocker Reintroduction and the Occurrence of Postoperative Atrial Fibrillation after Cardiac Surgery: A Prospective Cohort Study.

Background: For cardiac surgery patients under chronic β-blocker therapy, guidelines recommend their early postoperative reintroduction to decrease the incidence of postoperative atrial fibrillation. The authors hypothesized that the timing of β-blocker reintroduction affects their effectiveness on the incidence of postoperative atrial fibrillation.

Methods: This multicenter prospective French cohort study included patients on β-blockers (more than 30 days before surgery) in sinus rhythm without a pacemaker.

Rashba Cavity QED: A Route Towards the Superradiant Quantum Phase Transition.

We develop a theory of cavity quantum electrodynamics for a 2D electron gas in the presence of Rashba spin-orbit coupling and perpendicular static magnetic field, coupled to spatially nonuniform multimode quantum cavity photon field. We demonstrate that the lowest polaritonic frequency of the full Hamiltonian can vanish for realistic parameters, achieving the Dicke superradiant quantum phase transition. This singular behavior originates from soft spin-flip transitions possessing a nonvanishing dipole moment at nonzero wave vectors and can be viewed as a static paramagnetic instability.

Haemodynamic stress-induced breaches of the arterial intima trigger inflammation and drive atherogenesis.

Aims: Inflammatory mediators, including blood cells and their products, contribute critically to atherogenesis, but the igniting triggers of inflammation remain elusive. Atherosclerosis develops at sites of flow perturbation, where the enhanced haemodynamic stress could initiate the atherogenic inflammatory process due to the occurrence of mechanic injury. We investigated the role of haemodynamic stress-induced breaches, allowing the entry of blood cells in the arterial intima, in triggering inflammation-driven atherogenesis.

Systematic transoesophageal echocardiography after mitral valve replacement: Rates and determinants of paravalvular regurgitation.

Background: With the emergence of transcatheter mitral valve replacement, it appears crucial to provide contemporary references with which this new technology can be compared. At our institution, transoesophageal echocardiography is systematically performed before discharge after surgical mitral valve replacement.

Aim: To evaluate the rate and determinants of paravalvular regurgitation after surgical mitral valve replacement.

Clinical and haemodynamic outcomes of balloon-expandable transcatheter mitral valve implantation: a 7-year experience.

Aims: We analysed the early and long-term clinical and haemodynamic outcomes of balloon-expandable transcatheter mitral valve implantation (TMVI) in an experienced centre.

Methods And Results: All patients undergoing TMVI from July 2010 to July 2017 in our centre were prospectively included. Indication for TMVI relied on the judgement of the local heart team.

Timing of Referral of Patients With Severe Isolated Tricuspid Valve Regurgitation to Surgeons (from a French Nationwide Database).

Series evaluating the results of isolated tricuspid valve surgery (ITVS) are rare and often limited by small sample size, selection bias, and/or long period of enrollment. Based on a mandatory administrative national database, we collected all consecutive ITVS performed in France during a 2-year period (2013 and 2014), the type of intervention, clinical profile, and in-hospital mortality and complications. During the 2-year period, 241 patients underwent an ITVS in France (84 repairs and 157 replacements).

Thirteen-year experience with universal Staphylococcus aureus nasal decolonization prior to cardiac surgery: a quasi-experimental study.

Introduction: Sternal wound infection (SWI) after cardiac surgery is a severe complication. Among preventive measures, pre-operative decolonization of nasal carriage of Staphylococcus aureus has recently been shown to be beneficial. This quasi-experimental study assessed the effect of decolonization on the incidence of S.

Effectiveness of Rescue Percutaneous Balloon Aortic Valvuloplasty in Patients With Severe Aortic Stenosis and Acute Heart Failure.

The prognosis of patients with cardiogenic shock (CS) or refractory pulmonary edema because of severe aortic stenosis remains poor. The purpose of this study was to assess the outcomes of rescue percutaneous balloon aortic valvuloplasty (PBAV) in the transcatheter aortic valve implantation (TAVI) era. Patients were consecutively included between 2008 and 2016.

Is tricuspid annuloplasty increasing surgical mortality and morbidity during mitral valve replacement? A single-centre experience.

Background: Performance of tricuspid annuloplasty (TA) in patients undergoing mitral valve surgery is recommended based on the degree of tricuspid regurgitation and tricuspid annulus size, but is often underused.

Aim: To evaluate the impact of combined TA on in-hospital outcome in patients undergoing mitral valve replacement (MVR).

Methods: We selected all consecutive patients who underwent MVR for native valve disease.