Publications by authors named "Sandy Kassir"

Background: Echocardiography plays a key role in the diagnosis of infective endocarditis (IE), and recommendations have been published regarding the appropriate use of transesophageal echocardiography (TEE). The objective of this study is to evaluate the utilization of TEE in Regina, Saskatchewan, in the diagnosis of IE.

Methods: A retrospective chart review was performed on patients aged ≥ 18 years who received a TEE test for the diagnosis of IE from January 1 to December 31, 2019.

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To determine the number of patients with acute respiratory distress syndrome (ARDS) who would be eligible to receive veno-venous extracorporeal membrane oxygenation (VV-ECMO). We conducted a retrospective observational study of ARDS patients admitted to Regina General Hospital Intensive Care Unit (ICU). VV-ECMO eligibility was assessed using selection criteria from the Extracorporeal Membrane Oxygenation for Severe Acute Respiratory Syndrome trial (EOLIA), the Extracorporeal Life Support Organization (ELSO), New South Wales (NSW), Critical Care Services Ontario (CCSO) and a Regina-restrictive criteria.

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Background: Among critically ill patients receiving mechanical ventilation, Candida spp. are commonly detected in the lower respiratory tract (LRT). This is generally considered to represent colonization.

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To externally validate the Hospital Frailty Risk Score (HFRS) in critically ill patients. We selected older adult (≥ 75 years old) hospitalizations receiving mechanical ventilation, using the Nationwide Readmissions Database (January 1, 2016-November 30, 2018). Frailty risk was subcategorized into low-risk (HFRS score < 5), intermediate-risk (score 5-15), and high-risk (score > 15).

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To evaluate the long-term safety of directly discharging intensive care unit (ICU) survivors to their home. A retrospective observational cohort of 341 ICU survivors who were directly discharged home from the ICU ("direct discharge") or discharged home ≤72 hours after ICU transfer to the ward ("ward transfer") was conducted in Regina, Saskatchewan ICUs between September 1, 2016 and September 30, 2018. The primary outcome was 90-day hospital readmission.

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Background: Infectious complications of injection drug use (IDU) often require lengthy inpatient treatment. Our objective was to identify the number of admissions related to IDU in Regina, Canada, as well as describe patient demographics and comorbidities, yearly mortality, readmission rate, and cumulative cost of these hospitalizations between January 1 and December 31, 2018. Additionally, we sought to identify factors that increased risk of death or readmission.

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Mitochondrial protein (MP) dysfunction has been linked to neurodegenerative disorders (NDs); however, the discovery of the molecular mechanisms underlying NDs has been impeded by the limited characterization of interactions governing MP function. Here, using mass spectrometry (MS)-based analysis of 210 affinity-purified mitochondrial (mt) fractions isolated from 27 epitope-tagged human ND-linked MPs in HEK293 cells, we report a high-confidence MP network including 1,964 interactions among 772 proteins (>90% previously unreported). Nearly three-fourths of these interactions were confirmed in mouse brain and multiple human differentiated neuronal cell lines by primary antibody immunoprecipitation and MS, with many linked to NDs and autism.

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Article Synopsis
  • Mitochondria, vital double-membraned organelles, play critical roles in various cellular processes, and their dysfunction is linked to increasing cases of human disorders, including cancer and neurodegenerative diseases.
  • High-throughput proteomic and genomic techniques used in simpler model organisms are valuable for investigating the interactions between mitochondrial proteins, potentially uncovering many unknown protein functions.
  • The review emphasizes the importance of these experimental methods in mapping mitochondrial interaction networks, which can lead to the identification of new candidate genes associated with mitochondrial diseases and enhance our understanding of neurodegenerative disease mechanisms.
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