Publications by authors named "Peikert A"

Background And Aims: An expansion of fat mass is an integral feature of patients with heart failure and preserved ejection fraction (HFpEF). While body mass index (BMI) is the most common anthropometric measure, a measure of central adiposity-the waist-to-height ratio (WHtR)-focuses on body fat content and distribution; is not distorted by bone or muscle mass, sex, or ethnicity; and may be particularly relevant in HFpEF.

Methods: The PARAGON-HF trial randomized 4796 patients with heart failure and ejection fraction ≥45% to valsartan or sacubitril/valsartan.

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Background: Patients hospitalised for COVID-19 are at risk for multiorgan failure and death. Sodium-glucose co-transporter-2 (SGLT2) inhibitors provide cardiovascular and kidney protection in patients with cardiometabolic conditions and could provide organ protection during COVID-19. We aimed to investigate whether SGLT2 inhibitors can reduce the need for organ support in patients hospitalised for COVID-19.

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Heart failure with preserved ejection fraction (HFpEF) constitutes approximately half of the heart failure population, with its prevalence markedly increasing with older age and the presence of cardio-metabolic comorbidities. Although HFpEF is associated with a high symptom- and mortality burden, historically there have been few evidence-based treatment options for patients with HFpEF. Recent randomized clinical trials have expanded evidence on pharmacological treatment options, introducing new agents for managing HFpEF.

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Background: Monoclonal antibodies (mAbs) targeting the calcitonin gene-related peptide (CGRP) pathway have shown good efficacy in migraine prophylaxis. However, a subset of patients does not respond to the first mAb treatment and switches among the available mAbs. The goal of this study is to characterize the switching pattern of migraine patients treated with anti-CGRP(-receptor, -R) mAbs, and to describe the headache burden of those who did not switch, switched once, and switched twice.

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Article Synopsis
  • Determining how psychological constructs are structured and measured is crucial in developmental science, and structural equation modeling (SEM) is a key method for analyzing these complex relationships.
  • However, estimating the required sample size and statistical power for SEM can be tough, especially when comparing models that aren’t directly related or "non-nested."
  • The authors introduce a Monte Carlo simulation method to help researchers estimate statistical power for choosing between non-nested SEM models, providing a practical guide based on their research on memory development in children.
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Objectives: To summarize current evidence of high-dose influenza vaccine (HD-IV) vs standard-dose (SD-IV) regarding severe clinical outcomes.

Methods: A prespecified meta-analysis was conducted to assess relative vaccine effectiveness (rVE) of HD-IV vs SD-IV in reducing the rates of (1) pneumonia and influenza (P&I) hospitalization, (2) all hospitalizations, and (3) all-cause death in adults ≥ 65 years in randomized controlled trials. Pooled effect sizes were estimated using fixed-effects models with the inverse variance method.

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In patients with stable chronic heart failure with a reduced ejection fraction (HFrEF), left ventricular ejection fraction (LVEF) provides limited prognostic value, especially in patients with moderately to severely reduced LVEF. Echocardiographic parameters of right ventricular function may be associated with adverse clinical events in these patients. Therefore, we analyzed 164 patients with HFrEF in a prospective single-center cohort study to evaluate whether the parameters of right ventricular function are associated with worsening heart failure (WHF) hospitalizations, cardiovascular and all-cause deaths and combined endpoints.

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  • A secondary analysis of the INVESTED trial found that high-dose trivalent influenza vaccines didn't significantly lower mortality or hospitalizations for patients with high-risk cardiovascular disease compared to standard-dose quadrivalent vaccines.
  • The study focused on the antibody response to these vaccines and how it relates to clinical outcomes among patients who had recent heart issues.
  • Results showed that high-dose vaccines produced a stronger antibody response for various influenza strains, indicating a better immune response despite no clear impact on health outcomes.
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Aims: Patients with heart failure (HF) and history of myocardial infarction (MI) face a higher risk of disease progression and clinical events. Whether sodium-glucose cotransporter 2 inhibitors may modify clinical trajectory in such individuals remains incompletely understood.

Methods And Results: The DAPA-HF and DELIVER trials compared dapagliflozin with placebo in patients with symptomatic HF with left ventricular ejection fraction (LVEF) ≤40% and > 40%, respectively.

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Reproducible research and open science practices have the potential to accelerate scientific progress by allowing others to reuse research outputs, and by promoting rigorous research that is more likely to yield trustworthy results. However, these practices are uncommon in many fields, so there is a clear need for training that helps and encourages researchers to integrate reproducible research and open science practices into their daily work. Here, we outline eleven strategies for making training in these practices the norm at research institutions.

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Background: Although beta-blockers are not recommended for the treatment of heart failure with preserved ejection fraction (HFpEF) according to the latest European Society of Cardiology and American Heart Association/American College of Cardiology/Heart Failure Society of America guidelines, these therapies remain commonly used for comorbidity management. There has been concern that beta-blockers may adversely influence clinical outcomes by limiting chronotropic response in HFpEF.

Objectives: This study sought to examine the contemporary use and implications of beta-blockers in patients with heart failure with mildly reduced ejection fraction (HFmrEF) or HFpEF.

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Article Synopsis
  • - The study explored whether high-dose trivalent influenza vaccines provide better protection against serious heart and lung events compared to standard-dose quadrivalent vaccines in high-risk cardiovascular patients during flu season.
  • - Conducted as a secondary analysis of the INVESTED trial from 2016 to 2019, involving 3,094 patients, the research tracked weekly flu activity and its impact on health outcomes.
  • - Results indicated that increasing influenza-like illness (ILI) activity correlated with a higher risk of serious health events, but high-dose vaccines did not show a significant advantage over standard doses in preventing these issues.
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Background: COVID-19 has been associated with endothelial injury, resultant microvascular inflammation and thrombosis. Activated endothelial cells release and express P-selectin and von Willebrand factor, both of which are elevated in severe COVID-19 and may be implicated in the disease pathophysiology. We hypothesized that crizanlizumab, a humanized monoclonal antibody to P-selectin, would reduce morbidity and death in patients hospitalized for COVID-19.

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Background: Patients with heart failure (HF) have a high burden of multimorbidity, often necessitating numerous medications. There may be clinical concern about introducing another medication, especially among individuals with polypharmacy.

Objectives: This study examined the efficacy and safety of addition of dapagliflozin according to the number of concomitant medications in HF with mildly reduced or preserved ejection fraction.

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Article Synopsis
  • Dapagliflozin is shown to enhance health outcomes in heart failure patients through improved scores on the Kansas City Cardiomyopathy Questionnaire (KCCQ) in a recent study (DELIVER trial).
  • The analysis focused on how dapagliflozin treatment affected individual KCCQ items, providing insights for clinicians to communicate treatment impact.
  • Results indicated significant improvements in various KCCQ components after 8 months of dapagliflozin treatment, especially regarding symptoms like lower limb edema and sleep issues related to shortness of breath.
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  • Separable nonlinear least squares (SNLLS) estimation can be applied effectively to all linear structural equation models (SEMs) represented in RAM notation, enhancing convergence and reducing computation time compared to traditional methods.
  • This method is particularly beneficial for models where some parameters have a linear relationship with the objective function, meaning that for models without unknown directed effects, researchers can obtain least squares estimates analytically.
  • The study also employs trek rules to connect graphical models to their covariance formulations and provides an efficient gradient expression, leading to improved performance in simulations with faster convergence rates and fewer iterations needed.
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Aims: Influenza vaccination is associated with reduced cardiopulmonary morbidity and mortality among patients with heart failure or recent myocardial infarction. The immune response to vaccination frequently results in mild adverse reactions (AR), which leads to vaccine hesitancy. This post hoc analysis explored the association between vaccine-related AR and morbidity and mortality in patients with high-risk cardiovascular disease.

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Background: The prevalence of heart failure with mildly reduced or preserved ejection fraction markedly increases with age, with older individuals disproportionately facing excess risk for mortality and hospitalization.

Methods: The DELIVER trial (Dapagliflozin Evaluation to Improve the Lives of Patients With Preserved Ejection Fraction Heart Failure) randomized patients with New York Heart Association functional class II-IV and left ventricular ejection fraction >40% to either dapagliflozin or placebo for a median follow-up period of 2.3 years.

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Aims: Worsening renal function may impact long-term outcomes in heart failure (HF). However, little is known about the longitudinal trajectories in renal function in relation to HF hospitalization or how this high-risk clinical event impacts renal outcomes.

Methods And Results: In PARAGON-HF, we evaluated the association between recency of prior HF hospitalization (occurring pre-randomization) and subsequent first renal composite outcome: (i) time to ≥50% decline in estimated glomerular filtration rate (eGFR); (ii) development of end-stage renal disease; or (iii) death attributable to renal causes.

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Extracellular adenosine-5'-triphosphate (ATP) acts as an import signaling molecule mediating inflammation via purinergic P2 receptors. ATP binds to the purinergic receptor P2X and promotes inflammation via increased expression of pro-inflammatory cytokines. Because of the central role of inflammation, we assumed a functional contribution of the ATP-P2X-axis in atherosclerosis.

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Background: This study aimed to evaluate the acute treatment of patients with severe aortic valve stenosis in Germany.

Methods And Results: Three treatment strategies in 11,027 patients acutely admitted due to aortic valve stenosis were compared from 2014 until 2018 using German nationwide records: The annual number of transcatheter aortic valve replacement (TAVR) procedures (1,294 to 1,827) and balloon valvuloplasty (BV only) procedures (170 to 233) in patients acutely admitted increased, but surgical aortic valve replacement (SAVR) procedures decreased (426 to 316). In comparison to BV only patients (mean age 81.

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