Publications by authors named "Louis Mathieu Stevens"

Objective: This study aimed to evaluate in hospital outcomes after carotid endarterectomy (CEA) according to shunt usage, particularly in patients with contralateral carotid occlusion (CCO) or recent stroke. Data from CEAs registered in the Vascular Quality Initiative database between 2012 and 2020 were analysed, excluding surgeons with < 10 CEAs registered in the database, concomitant procedures, re-interventions, and incomplete data.

Methods: Based on their rate of shunt use, participating surgeons were divided in three groups: non-shunters (< 5%), selective shunters (5 - 95%), and routine shunters (> 95%).

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Background: Previous data have shown that sex-related differences exist in aortic arch surgery, with female patients experiencing worse outcomes. Over time, as surgical techniques and strategies have improved, these improvements have benefitted female patients. Using a multicenter national aortic registry from the Canadian Thoracic Aortic Collaborative (CTAC), we aimed to determine the relationship between sex and outcomes following aortic arch repair and to examine how these have changed over time.

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Background: Data regarding the reliability of predicted effective orifice area indexed (pEOAi) is scarce in transcatheter aortic valve replacement (TAVR).

Aims: To assess the validity of the pEOAi in TAVR by correlating its value with echocardiography-derived hemodynamic data.

Methods: A single-center retrospective cohort study of TAVR patients from 2012 to 2021 with available echocardiograms was conducted.

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The purpose of this article is to document the development and validation process of an instrument adapted for French-speaking nurses and to measure the occurrence of omitted nursing care (ONC) in the intensive care unit (ICU). An electronic Delphi panel, involving ICU nursing experts from the province of Quebec (Canada), was used to develop the intensive care unit omitted nursing care (ICU-ONC) instrument. For the validation process, an electronic cross-sectional survey was conducted.

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Objective: We compared perioperative outcomes of patients with acute type A aortic dissection undergoing hemiarch (HA) versus extended arch (EA) repair with or without descending aortic intervention.

Methods: Nine hundred twenty-nine patients underwent acute type A aortic dissection repair (2002-2021, 9 centers) including open distal repair (HA) with or without additional EA repair. EA with intervention on the descending aorta (EAD) included elephant trunk, antegrade thoracic endovascular aortic replacement, or uncovered dissection stent.

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Background Limited data exist on long-term readmission and its association with patient and procedural characteristics after coronary artery bypass grafting. We aimed to investigate 5-year readmission after coronary artery bypass grafting and specifically focus on the role of sex and off-pump surgery. Methods and Results We performed a post hoc analysis of the CORONARY (Coronary Artery Bypass Grafting [CABG] Off or On Pump Revascularization) trial, involving 4623 patients.

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Objectives: The main objective was to assess whether a composite coronary artery bypass grafting strategy including a saphenous vein graft bridge to distribute left internal mammary artery outflow provides non-inferior patency rates compared to conventional grafting surgery with separated left internal mammary artery to left anterior descending coronary graft and aorto-coronary saphenous vein grafts to other anterolateral targets.

Methods: All patients underwent isolated grafting surgery with cardiopulmonary bypass and received ≥2 grafts/patients on the anterolateral territory. The graft patency (i.

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Introduction: Prior research showed that work environment features in acute care settings influence nurses' capacity to provide care and impacts patient outcomes (e.g., falls).

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Primary graft dysfunction (PGD) is characterized by alveolar epithelial and vascular endothelial damage and inflammation, lung edema and hypoxemia. Up to one-third of recipients develop the most severe form of PGD (Grade 3; PGD3). Animal studies suggest that neutrophils contribute to the inflammatory process through neutrophil extracellular traps (NETs) release (NETosis).

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Purpose: Coronary bioresorbable stents (BRS) do not produce blooming artifacts on computed tomography (CT), in contrast to metallic stents, as they are made of a bioresorbable polymer and are radiolucent. They allow to evaluate the coronary plaque beneath. The low-attenuation plaque (LAP) suggests plaque vulnerability and is CT assessable.

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Objectives: Relative rates of early graft failure and conduit selection in coronary artery bypass grafting (CABG) surgery remain controversial. Therefore, we sought to determine the incidence and determinants of graft failure of the left internal mammary artery (LIMA), radial artery, saphenous vein, and right internal mammary artery (RIMA) 1 year after CABG surgery.

Methods: A post hoc analysis of the Cardiovascular Outcomes for People Using Anticoagulation Strategies (COMPASS) CABG study, involving patients from 83 centers in 22 countries.

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Objective: Currently, there is no risk scores built to predict risk in thoracic aortic surgery. This study aims to develop and internally validate a risk prediction score for patients who require arch reconstruction with hypothermic circulatory arrest.

Methods: From 2002 to 2018, data for 2270 patients who underwent aortic arch surgery in 12 institutions in Canada were retrospectively collected.

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Given the broad array of potential complications following cardiac surgery, specialized care is critical to ensuring good patient outcomes. Herein, we present a rare case of severe hemodynamic compromise, following cardiac surgery, found to be due to iatrogenic superior vena cava syndrome in the setting of baseline biventricular dysfunction. Hemodynamics improved immediately upon addressing the syndrome, highlighting the importance of multidisciplinary collaboration in the postoperative care of cardiac surgery patients.

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Objectives: We applied the Clavien-Dindo Complications Classification (CDCC) and the Comprehensive Complication Index (CCI) to the CORONARY trial to assess whether quantitative early morbidity affects outcomes at 1 year.

Methods: All postoperative hospitalization and 30-day follow-up complications were assigned a CDCC grade. CCI were calculated for all patients (n = 4752).

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Intravascular leiomyomatosis is a rare entity defined by benign smooth uterine muscle cells that typically originate from the uterus with the potential to spread into veins possibly up to the heart. The diagnosis for patients presenting with cardiac symptoms may be difficult and imaging often interpreted as thrombus or atrial myxoma.

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Background: To explore evolving surgical techniques and outcomes for aortic arch surgery.

Methods: A total of 2435 consecutive patients underwent aortic arch repair with hypothermic circulatory arrest between 2008 and 2018 in 12 institutions across Canada. Trends in patient characteristics, surgical techniques, and in-hospital outcomes, including major morbidity or mortality, were examined.

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Background: Data is controversial regarding the existence of an "obesity paradox" in patients undergoing Transcatheter Aortic Valve Replacement (TAVR). We sought to investigate the prognostic value of the body mass index (BMI) on outcomes following TAVR.

Methods: This is an observational, single-center study involving all patients who underwent TAVR from 2009 to 2019.

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Importance: The relative safety and patency of skeletonized vs pedicled internal mammary artery grafts in patients undergoing coronary artery bypass graft (CABG) surgery are unknown.

Objective: To investigate the association of skeletonized vs pedicled harvesting with internal mammary artery graft patency and clinical outcomes 1 year after CABG surgery.

Design, Setting, And Participants: This study was a post hoc analysis of the multicenter, randomized, double-blind, placebo-controlled Cardiovascular Outcomes for People Using Anticoagulation Strategies (COMPASS) clinical trial, which enrolled 27 395 patients from 602 centers in 33 countries from March 2013 through May 2016.

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Objective: The purpose of the present study was to investigate the hypothesis of a nychthemeral variation in the tolerance to ischemia and reperfusion injury in adult cardiac surgeries.

Design: Retrospective cohort study.

Setting: A single academic center.

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Enhanced Recovery Programs (ERPs) are protocols involving the whole patient surgical journey. These protocols are based on multimodal, multidisciplinary, evidence-based, and patient-centered approaches aimed at improving patient recovery after a surgical intervention. Such programs have shown striking positive results in different surgical specialties.

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Objectives: Rheumatic heart disease is endemic in sub-Saharan Africa. There is a paucity of data on the outcomes of valvular surgery for rheumatic heart disease in the developing world. The objective of this study was to evaluate the outcomes of aortic and mitral valve surgery for rheumatic heart disease in Ethiopia.

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