Publications by authors named "Shimony A"

Background: Adverse cardiac remodeling is a major risk factor for the development of post myocardial infarction (MI) heart failure (HF). This study investigates the effects of the chymase inhibitor fulacimstat on adverse cardiac remodeling after acute ST-segment-elevation myocardial infarction (STEMI).

Methods: In this double-blind, randomized, placebo-controlled trial patients with first STEMI were eligible.

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Background: The diagnosis of pulmonary arterial hypertension requires right heart catheterization (RHC) which is typically performed via proximal venous access (PVA). Antecubital venous access (AVA) is an alternative approach for RHC that can minimize complications, decrease procedural duration and allow for immediate patient recovery. A direct comparison between the two procedures in patients with pulmonary hypertension (PH) is lacking.

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Background: Limited data are available regarding the optimal management of patients with cancer in the acute myocardial infarction (AMI) setting.

Patients And Methods: We studied consecutive patients with AMI included in a national registry (years 2010, 2016) with the diagnosis of past or active malignancy and followed them for 1 year.

Results: Our cohort consisted of 2937 cancer-naive patients and 152 patients with cancer, of whom 35% presented with active malignancies.

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Background: The standard approach for urgent trans-venous temporary cardiac pacemaker (TVTP) implantation is fluoroscopy guidance. The delay in activation of the fluoroscopy-room and the transfer of unstable patients may be life-threatening. Echocardiography-guided TP implantation may increase the safety of the patients by obviating the need for in-hospital transfer.

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Introduction: Risk factors for exercise limitation after acute pulmonary embolism (PE) are unknown. As a planned sub-study of the prospective, multicenter ELOPE (Evaluation of Long-term Outcomes after PE) Study, we aimed to describe the results of serial imaging by computed tomography pulmonary angiography (CTPA) and perfusion scan during 1 year after a first episode of acute pulmonary embolism, and to assess the association between imaging parameters and exercise limitation at 1 year.

Methods: In a prospective cohort study, 100 patients were recruited between June 2010 and February 2013 at five Canadian university-affiliated hospitals.

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We report a detailed phenotypic, cytogenetic and molecular characterization of a patient prenatally diagnosed with Turner syndrome (TS). In addition to having typical TS clinical characteristics including webbed neck, high arched palate and coarctation of the aorta, the patient had features less frequently seen in TS. These included recurrent parathyroid adenomas, growth along the 75-90 centiles on the TS height curve despite minimal treatment with growth hormone, behavioral problems and evidence of gonadal dysgenesis with testicular-like structures, such as seminiferous tubules lined by Sertoli cells and a contiguous nodule of Leydig cells.

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Energy-transport effects can alter the structure that develops as a supernova evolves into a supernova remnant. The Rayleigh-Taylor instability is thought to produce structure at the interface between the stellar ejecta and the circumstellar matter, based on simple models and hydrodynamic simulations. Here we report experimental results from the National Ignition Facility to explore how large energy fluxes, which are present in supernovae, affect this structure.

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Background: Premature myocardial infarction (MI) is an increasingly prevalent cause of morbidity and mortality worldwide. A subset of patients, predominantly young women, present with MI with no obstructive coronary artery disease (MINOCA), a nomenclature gaining recognition. However, few data exist on presentation and prognosis according to the severity of coronary artery disease (CAD).

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Atrial fibrillation (AF) is highly prevalent in dialysis patients, however whether its impact differs between patients on haemodialysis (HD) vs. peritoneal dialysis (PD) is unknown. We aimed to compare the association of AF and clinical outcomes in different dialysis modalities.

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Treatment delays in patients with acute myocardial infarction (AMI) are related to increased morbidity and mortality. Hence, identifying determinants of delay may help reduce time to treatment. Importantly, limited data suggest that there may be sex-related disparities in benchmark timelines.

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Acute cardiovascular care has progressed considerably since the last position paper was published 10 years ago. It is now a well-defined, complex field with demanding multidisciplinary teamworking. The Acute Cardiovascular Care Association has provided this update of the 2005 position paper on acute cardiovascular care organisation, using a multinational working group.

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Background: We aimed to evaluate health-related quality of life (QOL), dyspnea, and functional exercise capacity during the year following the diagnosis of a first episode of pulmonary embolism.

Methods: This was a prospective multicenter cohort study of 100 patients with acute pulmonary embolism recruited at 5 Canadian hospitals from 2010-2013. We measured the outcomes QOL (by Short-Form Health Survey-36 [SF-36] and Pulmonary Embolism Quality of Life [PEmb-QoL] measures), dyspnea (by the University of California San Diego Shortness of Breath Questionnaire [SOBQ]) and 6-minute walk distance at baseline and 1, 3, 6, and 12 months after acute pulmonary embolism.

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Background: We aimed to determine the frequency and predictors of exercise limitation after pulmonary embolism (PE) and to assess its association with health-related quality of life (HRQoL) and dyspnea.

Methods: One hundred patients with acute PE were recruited at five Canadian hospitals from 2010 to 2013. Cardiopulmonary exercise testing (CPET) was performed at 1 and 12 months.

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Background: Over past decades, the incidence of acute coronary syndrome (ACS) has increased in young women, and greater mortality rates after discharge were observed among young women vs men. We revisited this issue with contemporary data from the Gender and Sex Determinants of Cardiovascular Disease: From Bench to Beyond Premature Acute Coronary Syndrome (GENESIS-PRAXY), a multicentre prospective cohort study.

Methods: One thousand two hundred thirteen patients were enrolled in GENESIS-PRAXY from 26 centres across Canada, the United States, and Switzerland between January 2009 and April 2013.

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Background: Combination therapy (CT) for patients with pulmonary arterial hypertension (PAH) has been recommended for many years, despite weak evidence of efficacy over monotherapy (MT). A previous meta-analysis comparing CT vs MT with pulmonary vasodilators failed to demonstrate a clear reduction in clinical worsening events.

Methods: We searched for relevant articles in PubMed, EMBASE, the Cochrane Database, and clinicaltrials.

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Article Synopsis
  • The study investigates the occurrence of spasm in the left main coronary artery (LM) among patients with additional coronary issues who underwent bypass surgery and repeat angiography within five years.
  • Out of 84 analyzed patients, 20% had a normal LM on repeat angiography, while 80% showed significant stenosis, with initial LM blockage being less severe in the normal cases.
  • The only significant predictor for normal LM at follow-up was finding tubular stenosis during the first angiogram, highlighting the importance of considering coronary spasm to avoid unnecessary bypass surgery.
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We report the first observation, in a supersonic flow, of the evolution of the Kelvin-Helmholtz instability from a single-mode initial condition. To obtain these data, we used a novel experimental system to produce a steady shock wave of unprecedented duration in a laser-driven experiment. The shocked, flowing material creates a shear layer between two plasmas at high energy density.

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Background: Prasugrel has proved its superiority over clopidogrel for reducing ischemic events among patients with ST elevation myocardial infarction (STEMI) undergoing urgent percutaneous coronary intervention (PCI). Data on switching of antiplatelet therapy in acute coronary syndrome patients in clinical practice are very limited. Importantly, the safety of in-hospital switching from clopidogrel to prasugrel following thrombolysis has not been addressed.

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Objective: Chronic lymphedema occurs frequently in breast cancer patients and is associated with significant morbidity and reduced quality-of-life. In this pilot study, the authors (1) addressed whether conducting a larger randomized controlled trial of aqua lymphatic therapy (ALT) would be feasible and (2) estimated the extent to which ALT combined with home-based exercise compared with home-based exercise alone would reduce arm disability in patients with breast cancer-related lymphedema.

Design: Twenty-five women with breast cancer-related lymphedema were randomized to either ALT in addition to a home land-based exercise program (ALT group; n = 13) or to a home land-based exercise program alone (control group; n = 12).

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Background: Access to care may be implicated in disparities between men and women in death after acute coronary syndrome, especially among younger adults. We aimed to assess sex-related differences in access to care among patients with premature acute coronary syndrome and to identify clinical and gender-related determinants of access to care.

Methods: We studied 1123 patients (18-55 yr) admitted to hospital for acute coronary syndrome and enrolled in the GENESIS-PRAXY cohort study.

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Abstract Morbidity from pulmonary arterial hypertension (PAH) ensues when the pulmonary pressure reaches suprasystemic levels. A transcatheter alternative to the Potts shunt would allow decompression of the right heart without the surgical risks. To aid development of a transcatheter aortopulmonary shunt (TAPS) device, we described the anatomic relationship between the left pulmonary artery (LPA) and the descending aorta (dAO) in adults with severe pulmonary hypertension.

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