Publications by authors named "Litwin S"

Article Synopsis
  • - The study investigates how SARS-CoV-2 monoclonal antibody (mAB) therapy affects the immune response in five cancer patients infected with the virus, comparing them to non-mAB-treated controls.
  • - Blood samples were analyzed for various immune responses, revealing that all patients produced antibodies and T-cell responses similar to those of controls, despite some having B-cell deficiencies.
  • - The findings indicate that mAB therapy results in a robust immune response against SARS-CoV-2 in cancer patients, showing the potential for effective protective immunity even with underlying malignancies.
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Background: Patients with heart failure, a preserved ejection fraction (HFpEF), and obesity have significant disability and suffer frequent exacerbations of heart failure. We hypothesized that tirzepatide, a long-acting agonist of glucose-dependent insulinotropic polypeptide and glucagon-like peptide-1 receptors, would improve a comprehensive suite of clinical endpoints, including measures of health status, functional capacity, quality of life, exercise tolerance, patient well-being, and medication burden in these patients.

Methods: 731 patients in class II-IV heart failure, ejection fraction ≥50%, and body mass index ≥30 kg/m were randomized(double-blind) to tirzepatide(titrated up to 15mg subcutaneously weekly)(n=364) or placebo(n=367), added to background therapy for a median of 104 weeks (Q1=66, Q3=126 weeks).

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Background: Obesity increases the risk of heart failure with preserved ejection fraction. Tirzepatide, a long-acting agonist of glucose-dependent insulinotropic polypeptide and glucagon-like peptide-1 receptors, causes considerable weight loss, but data are lacking with respect to its effects on cardiovascular outcomes.

Methods: In this international, double-blind, randomized, placebo-controlled trial, we randomly assigned, in a 1:1 ratio, 731 patients with heart failure, an ejection fraction of at least 50%, and a body-mass index (the weight in kilograms divided by the square of the height in meters) of at least 30 to receive tirzepatide (up to 15 mg subcutaneously once per week) or placebo for at least 52 weeks.

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Patients with obesity-related heart failure with preserved ejection fraction (HFpEF) display circulatory volume expansion and pressure overload contributing to cardiovascular-kidney end-organ damage. In the SUMMIT trial, patients with HFpEF and obesity were randomized to the long-acting glucose-dependent insulinotropic polypeptide receptor and glucagon-like peptide-1 receptor agonist tirzepatide (n = 364, 200 women) or placebo (n = 367, 193 women). As reported separately, tirzepatide decreased cardiovascular death or worsening heart failure.

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Cardiovascular disease (CVD) and cardiometabolic risk (CMR) are highly prevalent globally. The interplay between CVD/CMR and COVID-19 morbidity and mortality has been intensely studied over the last three years and has yielded some important discoveries and warnings for public health. Despite many advances in cardiovascular medicine, CVD continues to be the global leading cause of death.

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Article Synopsis
  • This study evaluated the effectiveness and safety of a new procedure called splanchnic nerve ablation for managing fluid volume in patients with heart failure and preserved ejection fraction (HFpEF).* -
  • Conducted as a phase 2, double-blind, randomized trial involving 90 patients across 15 centers, the study compared the outcomes of the nerve ablation procedure to a sham control.* -
  • Results showed no significant differences in both the primary outcomes (reduction in pulmonary capillary wedge pressure) and safety events between the treatment and control groups, suggesting that the nerve ablation may not provide the expected benefits for these patients.*
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Article Synopsis
  • An interatrial shunt is being studied as a potential treatment for heart failure, aimed at lowering left atrial pressure and improving symptoms and outcomes for patients.
  • In a clinical trial involving 508 patients, participants were randomly assigned to receive either the shunt or a placebo, with their progress tracked over a maximum of two years.
  • Results showed that while the shunt had no major safety issues, it did not significantly improve overall effectiveness compared to the placebo, although it appeared to reduce adverse cardiovascular events in patients with reduced left ventricular ejection fraction.
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U.S. Hispanic families with limited English proficiency experience barriers to autism diagnosis, such as lack of Spanish-speaking providers and assessments.

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Article Synopsis
  • * In the first trial (RCT-I), there were no significant differences in important health outcomes like cardiovascular mortality or stroke, while the second trial (RCT-II) showed a benefit in responder patients using shunts over a sham treatment.
  • * The atrial shunt treatment in responders led to fewer heart failure events and better health-related quality of life measured by KCCQ, but also had a higher rate of ischemic stroke and reduced worsening kidney dysfunction compared to sham treatment.
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Aims: Compared with those without obesity, patients with obesity-related heart failure with preserved ejection fraction (HFpEF) have worse symptoms, haemodynamics, and outcomes. Current weight loss strategies (diet, drug, and surgical) work through decreased energy intake rather than increased expenditure and cause significant loss of skeletal muscle mass in addition to adipose tissue. This may have adverse implications for patients with HFpEF, who already have reduced skeletal muscle mass and function and high rates of physical frailty.

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Introduction: Patient-centred care is more than just an aspiration, it represents a fundamental shift in the way healthcare must be delivered. Patient-centred emergency care is important for improving the patient and clinician experience and is essential for optimizing health outcomes. Creating a patient-centred emergency department emphasizes the importance of the patient's experience, preferences, and values.

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This article considers a way to test the hypothesis that two collections of objects are from the same uniform distribution of such objects. The exact -value is calculated based on the distribution for the observed overlaps. In addition, an interval estimate of the number of distinct objects, when all objects are equally likely, is indicated.

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Article Synopsis
  • - Patients with cirrhosis often face heart complications, particularly heart failure with preserved ejection fraction (HFpEF), which can be assessed using the H2FPEF score to identify those at risk, especially before liver transplant.
  • - A study involving 166 patients undergoing liver transplant found that those with non-alcoholic steatohepatitis (NASH) cirrhosis had significantly higher H2FPEF scores compared to those with alcohol-induced cirrhosis.
  • - While higher H2FPEF scores were linked to an increased risk of heart failure after the transplant, they did not correlate with the overall severity of liver disease or predict post-transplant mortality.
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Importance: Although the results of A Study to Evaluate the Corvia Medical Inc IASD System II to Reduce Elevated Left Atrial Pressure in Patients with Heart Failure (REDUCE LAP-HF II) trial were neutral overall, atrial shunt therapy demonstrated potential efficacy in responders (no latent pulmonary vascular disease and no cardiac rhythm management device). Post hoc analyses were conducted to evaluate the effect of shunt vs sham stratified by responder status.

Objective: To evaluate the effect of atrial shunt vs sham control on cardiac structure/function in the overall study and stratified by responder status.

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Objective: Splanchnic vasoconstriction augments transfer of blood volume from the abdomen into the thorax, which may increase filling pressures and hemodynamic congestion in patients with noncompliant hearts. Therapeutic interruption of splanchnic nerve activity holds promise to reduce hemodynamic congestion in patients with heart failure with preserved ejection fraction (HFpEF). Here we describe (1) the rationale and design of the first sham-controlled, randomized clinical trial of splanchnic nerve ablation for HFpEF and (2) the 12-month results of the lead-in (open-label) trial's participants.

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Systems-based practice (SBP) was first introduced as a core competency in graduate medical education (GME) in 2002 by the Accreditation Council for Graduate Medical Education as part of the Outcomes Project. While inclusion of SBP content in GME has become increasingly common, there have also been well-documented stumbling blocks, including perceptions that SBP has eroded the amount of curricular time available for more medically focused competencies, is not relevant for some practice contexts, and is not introduced early enough in training. As a result, SBP learning experiences often feel disconnected from medical trainees' practical reality.

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Somatic PTEN mutations are common and have driver function in some cancer types. However, in colorectal cancers (CRCs), somatic PTEN-inactivating mutations occur at a low frequency (~8-9%), and whether these mutations are actively selected and promote tumor aggressiveness has been controversial. Analysis of genomic data from ~53,000 CRCs indicates that hotspot mutation patterns in PTEN partially reflect DNA-dependent selection pressures, but also suggests a strong selection pressure based on protein function.

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Aims: Obesity is causally related to the development of heart failure with preserved ejection fraction (HFpEF) but complicates the diagnosis and treatment of this disorder. We aimed to determine the relationship between severity of obesity and clinical, echocardiographic and haemodynamic parameters in a large cohort of patients with documented HFpEF.

Methods And Results: The REDUCE LAP-HF II trial randomized 626 patients with ejection fraction ≥40% and exercise pulmonary capillary wedge pressure (PCWP) ≥25 mmHg to atrial shunt or sham procedure.

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Children commonly experience pain and distress in healthcare settings related to medical procedures such as blood tests and intravenous insertions (IVIs). Inadequately addressed pain and distress can result in both short- and long-term negative consequences. The use of socially assistive robotics (SARs) to reduce procedure-related distress and pain in children's healthcare settings has shown promise; however, the current options lack autonomous adaptability.

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Background & Objective: Socially assistive robots (SARs) are a promising tool to manage children's pain and distress related to medical procedures, but current options lack autonomous adaptability. The aim of this study was to understand children's and caregivers' perceptions surrounding the use of an artificial intelligence (AI)-enhanced SAR to provide personalized procedural support to children during intravenous insertion (IVI) to inform the design of such a system following a user-centric approach.

Methods: This study presents a descriptive qualitative needs assessment of children and caregivers.

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Introduction: Patients with non-small-cell lung cancer (NSCLC) who have never smoked or have tumors with mutations in EGFR generally derive minimal benefit from single-agent PD-1/PD-L1 checkpoint inhibitors. Prior data indicate that adding PD-L1 inhibition to anti-VEGF and cytotoxic chemotherapy may be a promising approach to overcoming immunotherapy resistance in these patients, however prospective validation is needed. This trial in progress (NCT03786692) is evaluating patients with stage IV NSCLC who have never smoked or who have tumors with sensitizing EGFR alterations to determine if a 4-drug combination of atezolizumab, carboplatin, pemetrexed, and bevacizumab can improve outcomes compared to carboplatin, pemetrexed and bevacizumab without atezolizumab.

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Heart failure with preserved ejection fraction is associated with elevated left atrial pressure during exercise. Sodium-glucose cotransporter-2 inhibitors have demonstrated the evidence of benefit in heart failure with preserved ejection fraction, but even with this treatment, heart failure hospitalizations remain high, and improvements in quality of life scores are modest. Thus, there is growing interest in nonpharmacological methods of limiting the rise in left atrial pressure during exertion.

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