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https://www.readbyqxmd.com/read/28087105/left-ventricular-assist-device-outcomes-based-on-flow-configuration-and-pre-operative-left-ventricular-dimension-an-interagency-registry-for-mechanically-assisted-circulatory-support-analysis
#1
Palak Shah, Sarah Birk, Simon Maltais, John Stulak, Angelo Elmi, Francis D Pagani, Jennifer A Cowger
BACKGROUND: Axial configuration (AC) and centrifugal configuration (CC) left ventricular assist devices (LVAD) have different flow characteristics, and whether the interaction between device flow configuration and the pre-operative left ventricular internal diastolic diameter (LVIDD) mediates adverse events after LVAD implantation is unknown. METHODS: We queried 9,424 continuous-flow LVAD recipients who received LVADs from April 2008 to June of 2015 in the Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS)...
December 16, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28069009/multi-center-randomized-placebo-controlled-trial-of-nocturnal-oxygen-therapy-in-chronic-obstructive-pulmonary-disease-a-study-protocol-for-the-inox-trial
#2
Yves Lacasse, Sarah Bernard, Frédéric Sériès, Van Hung Nguyen, Jean Bourbeau, Shawn Aaron, François Maltais
BACKGROUND: Long-term oxygen therapy (LTOT) is the only component of the management of chronic obstructive pulmonary disease (COPD) that improves survival in patients with severe daytime hypoxemia. LTOT is usually provided by a stationary oxygen concentrator and is recommended to be used for at least 15-18 h a day. Several studies have demonstrated a deterioration in arterial blood gas pressures and oxygen saturation during sleep in patients with COPD, even in those not qualifying for LTOT...
January 9, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28060448/design-of-a-mestranol-2-n-piperazino-substituted-derivative-showing-potent-and-selective-in%C3%A2-vitro-and-in%C3%A2-vivo-activities-in-mcf-7-breast-cancer-models
#3
Martin Perreault, René Maltais, Jenny Roy, Raphaël Dutour, Donald Poirier
Anticancer structure-activity relationship studies on aminosteroid (5α-androstane) derivatives have emerged with a promising lead candidate: RM-133 (2β-[1-(quinoline-2-carbonyl)pyrrolidine-2-carbonyl]-N-piperazine-5α-androstane-3α,17β-diol), which possesses high in vitro and in vivo activities against several cancer cells, and selectivity over normal cells. However, the relatively weak metabolic stability of RM-133 has been a drawback to its progression toward clinical trials. We investigated the replacement of the androstane backbone by a more stable mestranol moiety...
January 6, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28012643/reoperation-for-coronary-artery-bypass-grafting-surgery-outcomes-and-considerations-for-expanding-interventional-procedures
#4
Simon Maltais, Robert J Widmer, Malcolm R Bell, Richard C Daly, Joseph A Dearani, Kevin L Greason, David L Joyce, Lyle D Joyce, Hartzell V Schaff, John M Stulak
BACKGROUND: Owing to an inevitable degeneration of grafts over time, patients may require consideration for repeat coronary artery bypass graft (CABG) surgery. As our understanding of preoperative risks associated with redo CABG surgery is limited and availability of data is limited to historical cohorts, we sought to evaluate our contemporary 20-year experience with this challenging patient population. METHODS: Between January 1993 and June 2014, 748 patients underwent redo CABG surgery at our institution...
December 21, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27942208/three-minute-constant-rate-step-test-for-detecting-exertional-dyspnea-relief-after-bronchodilation-in-copd
#5
Benoit Borel, Courtney A Wilkinson-Maitland, Alan Hamilton, Jean Bourbeau, Hélène Perrault, Dennis Jensen, François Maltais
BACKGROUND: The aim of this study was to evaluate the responsiveness of the 3-minute constant rate step test (3-MST) to detect the relief of exertional dyspnea (respiratory discomfort) after acute bronchodilation in COPD patients. PATIENTS AND METHODS: A total of 40 patients with moderate-to-severe COPD (mean forced expiratory volume in 1 second: 45.7 (±14.7), % predicted) performed four 3-MSTs at randomly assigned stepping rates of 14, 16, 20 and 24 steps/min after inhalation of nebulized ipratropium bromide (500 µg)/salbutamol (2...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27932265/ottawa-panel-evidence-based-clinical-practice-guidelines-for-structured-physical-activity-in-the-management-of-juvenile-idiopathic-arthritis
#6
REVIEW
Sabrina Cavallo, Lucie Brosseau, Karine Toupin-April, George A Wells, Christine A M Smith, Arlanna G Pugh, Jennifer Stinson, Roanne Thomas, Sara Ahmed, Ciarán M Duffy, Prinon Rahman, Inmaculada C Àlvarez-Gallardo, Laurianne Loew, Gino De Angelis, Debbie Ehrmann Feldman, Annette Majnemer, Isabelle J Gagnon, Désirée Maltais, Marie-Ève Mathieu, Glen P Kenny, Susan Tupper, Kristi Whitney-Mahoney, Sarah Bigford
OBJECTIVE: To create guidelines focused on the use of structured physical activity (PA) in the management of juvenile idiopathic arthritis (JIA). DATA SOURCES: A systematic literature search was conducted using the electronic databases Cochrane Central Register of Controlled Trials, Medline (Ovid), EMBASE (Ovid), and Physiotherapy Evidence Database (PEDro) for all studies related to PA programs for JIA from January 1966 until December 2014, and was updated in May 2015...
December 5, 2016: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27865732/prevention-of-heartmate-ii-pump-thrombosis-through-clinical-management-the-prevent-multi-center-study
#7
Simon Maltais, Ahmet Kilic, Sriram Nathan, Mary Keebler, Sitaramesh Emani, John Ransom, Jason N Katz, Brett Sheridan, Andreas Brieke, Gregory Egnaczyk, John W Entwistle, Robert Adamson, John Stulak, Nir Uriel, John B O'Connell, David J Farrar, Kartik S Sundareswaran, Igor Gregoric
BACKGROUND: Recommended structured clinical practices including implant technique, anti-coagulation strategy, and pump speed management (PREVENT [PREVENtion of HeartMate II Pump Thrombosis Through Clinical Management] recommendations) were developed to address risk of early (<3 months) pump thrombosis (PT) risk with HeartMate II (HMII; St. Jude Medical, Inc. [Thoratec Corporation], Pleasanton, CA). We prospectively assessed the HMII PT rate in the current era when participating centers adhered to the PREVENT recommendations...
January 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27865723/mechanisms-of-effort-intolerance-in-patients-with-rheumatic-mitral-stenosis-combined-echocardiography-and-cardiopulmonary-stress%C3%A2-protocol
#8
Michal Laufer-Perl, Yaniv Gura, Jason Shimiaie, Jack Sherez, Gregg S Pressman, Galit Aviram, Simon Maltais, Ricki Megidish, Amir Halkin, Meirav Ingbir, Simon Biner, Gad Keren, Yan Topilsky
OBJECTIVES: This study sought to evaluate mechanisms of effort intolerance in patients with rheumatic mitral stenosis (MS). BACKGROUND: Combined stress echocardiography and cardiopulmonary testing allows assessment of cardiac function, hemodynamics, and oxygen extraction (A-Vo2 difference). METHODS: Using semirecumbent bicycle exercise, 20 patients with rheumatic MS (valve area 1.36 ± 0.4 cm(2)) were compared to 20 control subjects at 4 pre-defined activity stages (rest, unloaded, anaerobic threshold, and peak)...
November 10, 2016: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27861566/findings-on-thoracic-computed-tomography-scans-and-respiratory-outcomes-in-persons-with-and-without-chronic-obstructive-pulmonary-disease-a-population-based-cohort-study
#9
Wan C Tan, Cameron J Hague, Jonathon Leipsic, Jean Bourbeau, Liyun Zheng, Pei Z Li, Don D Sin, Harvey O Coxson, Miranda Kirby, James C Hogg, Rekha Raju, Jeremy Road, Denis E O'Donnell, Francois Maltais, Paul Hernandez, Robert Cowie, Kenneth R Chapman, Darcy D Marciniuk, J Mark FitzGerald, Shawn D Aaron
BACKGROUND: Thoracic computed tomography (CT) scans are widely performed in clinical practice, often leading to detection of airway or parenchymal abnormalities in asymptomatic or minimally symptomatic individuals. However, clinical relevance of CT abnormalities is uncertain in the general population. METHODS: We evaluated data from 1361 participants aged ≥40 years from a Canadian prospective cohort comprising 408 healthy never-smokers, 502 healthy ever-smokers, and 451 individuals with spirometric evidence of chronic obstructive pulmonary disease (COPD) who had thoracic CT scans...
2016: PloS One
https://www.readbyqxmd.com/read/27859590/miz-1-and-max-compete-to-engage-c-myc-implication-for-the-mechanism-of-inhibition-of-c-myc-transcriptional-activity-by-miz-1
#10
Mikaël Bédard, Loïka Maltais, Martin Montagne, Pierre Lavigne
c-Myc is a basic helix-loop-helix leucine zipper (b-HLH-LZ) transcription factor deregulated in the majority of human cancers. As a heterodimer with Max, another b-HLH-LZ transcription factor, deregulated and persistent c-Myc accumulates at transcriptionally active promoters and enhancers and amplifies transcription. This leads to the so-called transcriptional addiction of tumor cells. Recent studies have showed that c-Myc transcriptional activities can be reversed by its association with Miz-1, a POZ transcription factor containing 13 classical zinc fingers...
November 16, 2016: Proteins
https://www.readbyqxmd.com/read/27834608/factors-associated-with-moderate-to-vigorous-physical-activity-in-adolescents-born-preterm
#11
Ketsia Proulx, Annette Majnemer, Noémi Dahan-Oliel, Barbara Mazer, Line Nadeau, Kathleen Vanier, Désirée B Maltais
PURPOSE: Little is known about the physical activity of adolescents born prematurely. This study aimed to: 1) describe relationships between moderate to vigorous physical activity (MVPA) in adolescents born prematurely and various factors and, 2) compare their MVPA level to guidelines. METHODS: A secondary analysis was performed using data from 64 adolescents (16.1 ± 2.5 years old, born ≤29 weeks gestation; 57.8% girls). Time spent in MVPA was based on accelerometry data...
November 11, 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27794080/automatic-oxygen-titration-during-walking-in-subjects-with-copd-a-randomized-crossover-controlled-study
#12
François Lellouche, Erwan L'Her, Pierre-Alexandre Bouchard, Cynthia Brouillard, François Maltais
BACKGROUND: Arterial oxygen desaturation frequently occurs in patients with COPD during daily activities at home. Oxygen flow is usually set at fixed and low rates for ambulatory patients. We evaluated an innovative closed-loop system (FreeO2) that automatically adjusts the oxygen flow to the patient's needs in subjects with COPD during walking followed by recovery time, such as during ambulatory conditions. METHODS: Patients with COPD who exhibited oxygen desaturation on exertion were included in the study...
November 2016: Respiratory Care
https://www.readbyqxmd.com/read/27793517/a-multi-institutional-outcome-analysis-of-patients-undergoing-left-ventricular-assist-device-implantation-stratified-by-sex-and-race
#13
Justin van Meeteren, Simon Maltais, Shannon M Dunlay, Nicholas A Haglund, Mary Beth Davis, Jennifer Cowger, Palak Shah, Keith D Aaronson, Francis D Pagani, John M Stulak
BACKGROUND: Earlier studies have demonstrated disparities in patients undergoing left ventricular assist device (LVAD) implantation when stratified according to sex and race. Because very few data exist from large investigations, we reviewed data from the registry of the Mechanical Circulatory Support Research Network. METHODS: Between May 2004 and September 2014, 734 patients underwent primary LVAD implantation at our institutions. Median age at implant was 57 (range 18 to 82) years and there were 577 males (80%)...
January 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27765670/ventricular-assist-device-therapy-in-older-patients-with-heart-failure-characteristics-and-outcomes
#14
Ju H Kim, Ramesh Singh, Francis D Pagani, Shashank S Desai, Nicholas A Haglund, Shannon M Dunlay, Simon Maltais, Keith D Aaronson, John M Stulak, Mary E Davis, Christopher T Salerno, Jennifer A Cowger, Palak Shah
BACKGROUND: Limited data exist on outcomes in patients ≥70 years of age supported with the use of continuous-flow left ventricular assist devices (LVADs). METHODS: Data on 1149 continuous-flow LVAD recipients was queried from the Mechanical Circulatory Support Research Network. Groups were assigned based on age: ≥70 years ("older patients") and <70 years. The primary outcome was survival at one-year based on age grouping. RESULTS: Compared with younger patients (54...
October 17, 2016: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/27743635/correlation-of-pre-explant-lactate-dehydrogenase-concentrations-and-findings-during-post-explant-pump-analysis-of-the-heartmate-ii-left-ventricular-assist-device
#15
Vikram Sood, Osman Alam, Vakhtang Tchantchaleishvili, Francis D Pagani, Keith D Aaronson, Jonathan Haft, David L Joyce, Lyle D Joyce, Richard C Daly, Simon Maltais, John M Stulak
BACKGROUND: Analyses of the HeartMate II left ventricular assist device are routinely performed after explant if returned to the manufacturer. Findings from manufacturer-reported pump analyses have not been correlated with pre-explant serum lactate dehydrogenase (LDH) values. METHODS: Between May 2004 and December 2014, 502 patients underwent primary HeartMate II implantation. Seventy pumps were explanted in 58 patients and returned to the manufacturer for pump analysis: 51 (73%) for suspected pump thrombosis, 12 (17%) for device-related infection, and 7 (13%) for percutaneous lead fracture...
October 12, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27676938/factors-associated-with-the-physical-activity-of-adolescents-born-extremely-prematurely
#16
Désirée Maltais, Ketsia Proulx, Annette Majnemer, Noémi Dahan-Oliel, Barbara Mazer, Line Nadeau
OBJECTIVE: This study aimed to describe relationships between the time adolescents born extremely prematurely spend in moderate-to-vigorous physical activity (MVPA) and selected sociodemographic, prematurity and co-morbidity factors. MATERIAL/PATIENTS AND METHODS: Participants were 64 adolescents, 16.1±2.5years old (57.8% girls), who were born<30weeks gestation. They each wore an accelerometer over the right hip for up to seven days in order to establish their time spent in MVPA...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27632042/a-roundtable-discussion-exploring-major-trends-in-dialysis-practice-and-technology
#17
Sean Loughlin, Danilo Concepcion, Gema Gonzalez, Jo-Ann Maltais, Carolyn Neuland, Joseph Pulliam, Denny Treu, Richard J Williams
No abstract text is available yet for this article.
September 2016: Biomedical Instrumentation & Technology
https://www.readbyqxmd.com/read/27623610/the-effects-of-acute-intense-physical-exercise-on-postural-stability-in-children-with-cerebral-palsy
#18
Matthew J Leineweber, Dominik Wyss, Sophie-Krystale Dufour, Claire Gane, Karl Zabjek, Laurent J Bouyer, Désirée B Maltais, Julien I Voisin, Jan Andrysek
This study evaluated the effects of intense physical exercise on postural stability of children with cerebral palsy (CP). Center of pressure (CoP) was measured in 9 typically developing (TD) children and 8 with CP before and after a maximal aerobic shuttle-run test (SRT) using a single force plate. Anteroposterior and mediolateral sway velocities, sway area, and sway regularity were calculated from the CoP data and compared between pre- and postexercise levels and between groups. Children with CP demonstrated significantly higher pre-SRT CoP velocities than TD children in the sagittal (18...
July 2016: Adapted Physical Activity Quarterly: APAQ
https://www.readbyqxmd.com/read/27601891/automated-oxygen-titration-and-weaning-with-freeo2-in-patients-with-acute-exacerbation-of-copd-a-pilot-randomized-trial
#19
François Lellouche, Pierre-Alexandre Bouchard, Maude Roberge, Serge Simard, Erwan L'Her, François Maltais, Yves Lacasse
INTRODUCTION: We developed a device (FreeO2) that automatically adjusts the oxygen flow rates based on patients' needs, in order to limit hyperoxia and hypoxemia and to automatically wean them from oxygen. OBJECTIVE: The aim of this study was to evaluate the feasibility of using FreeO2 in patients hospitalized in the respiratory ward for an acute exacerbation of COPD. METHODS: We conducted a randomized controlled trial comparing FreeO2 vs manual oxygen titration in the respiratory ward of a university hospital...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27594052/comparison-of-techniques-for-culture-of-dialysis-water-and-fluid
#20
Jo-Ann B Maltais, Klemens B Meyer, Meredith C Foster
Introduction Microbiological culture of dialysis water and fluid is a routine safety measure. In the United States (U.S.), laboratories perform these cultures on trypticase soy agar at 35-37°C for 48 h (TSA-48h), not on the tryptone glucose extract agar or Reasoner's 2A agar at 17-23°C for 7 days (TGEA-7d and R2A-7d, respectively) recommended by international standards. We compared culture methods to identify samples exceeding the accepted action level of 50 CFU/mL. Methods Dialysis water and fluid samples collected from 41 U...
September 5, 2016: Hemodialysis International
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