Publications by authors named "Derek D Cyr"

Understanding disparities in COVID-19 preventive efforts among underserved populations requires a holistic approach that considers multiple social determinants of health (SDOH). While disparities in individual COVID-19 risk factors are well-documented, the cumulative impact of these factors on vaccine uptake and testing remains insufficiently quantified. This study applies a polysocial risk framework to assess the combined influence of geo-demographic, economic, and health-related factors on COVID-19 vaccination and testing.

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Background: Children living in poverty face particular risk for pandemic-related adverse health events. Place-based pandemic-related health inequities may vary for children living in poverty due to social and environmental factors. We aimed to examine the association between living in low-income households and COVID-19 testing in youth across several regions of the United States.

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Background: PARAGLIDE-HF showed significantly greater reduction in NT-proBNP in patients with LVEF>40% and worsening HF with sacubitril/valsartan (sac/val) vs valsartan (val). The impact of structural abnormalities on the effects of sac/val in this context is unknown. This study aimed to evaluate the impact of left ventricular hypertrophy (LVH) and left atrial enlargement (LAE) on sac/val in patients with LVEF>40% and worsening HF.

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Background: This study examined stress echocardiography in relation to coronary artery anatomy and outcome in subjects randomized in the International Study of Comparative Health Effectiveness with Medical and Invasive Approaches (ISCHEMIA) trial.

Methods: Of 5,179 patients randomized to initial invasive or conservative strategy, stress echocardiography was performed in 1,079. Coronary computed tomographic angiogram (CCTA) excluded left main disease and quantified coronary lesions.

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Background: The win ratio (WR) is an emerging alternative for reporting composite outcomes, prioritizing clinically significant events such as mortality while incorporating surrogate measures. However, its benefits should be weighed against limitations, particularly the influence of lower hierarchical outcomes. This secondary analysis of the PARAGLIDE-HF trial performed a WR sensitivity analysis using a modified hierarchical composite outcome to assess the utility of WR sensitivity analysis and the efficacy of sacubitril/valsartan versus valsartan.

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Article Synopsis
  • In the PARAGLIDE-HF trial, sacubitril/valsartan showed better results than valsartan alone in reducing NT-proBNP levels in patients with ejection fraction over 40% after heart failure, but increased instances of symptomatic hypotension (SH) were noted.
  • Of the 466 patients studied, 19.7% experienced SH, with a higher occurrence in those treated with sacubitril/valsartan compared to valsartan, though the timing of SH events was similar in both groups.
  • Patients with SH were more likely to be white, have lower baseline systolic blood pressure, and have a higher left ventricular ejection fraction, but the drug's effectiveness in lowering NT-proBNP
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Article Synopsis
  • * In the ISCHEMIA trial, women had similar catheterization rates but significantly lower revascularization rates than men (73.4% vs. 81.2%, respectively).
  • * Despite these differences, there were no significant disparities in primary outcomes like cardiovascular death and myocardial infarction between women and men, indicating that both sexes responded similarly to treatment.
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Background: Electronic health record (EHR)-based identification of heart failure with preserved ejection fraction (HFpEF) in the clinical setting may facilitate screening for clinical trials by improving the understanding of its epidemiology and outcomes; yet, previous data have yielded variable results. We sought to characterize groups identified with HFpEF by different EHR screening strategies and their associated long-term outcomes across a large and diverse population.

Methods: We retrospectively analyzed 116,499 consecutive patients from an academic referral center who underwent echocardiography, and 9,263 patients who underwent echocardiography within 6 months of right heart catheterization (RHC), between 2008 and 2018.

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Background: Ischemia with nonobstructive coronary arteries (INOCA) is common clinically, particularly among women, but its prevalence among patients with at least moderate ischemia and the relationship between ischemia severity and non-obstructive atherosclerosis severity are unknown.

Objectives: The authors investigated predictors of INOCA in enrolled, nonrandomized participants in ISCHEMIA (International Study of Comparative Health Effectiveness with Medical and Invasive Approaches), sex differences, and the relationship between ischemia and atherosclerosis in patients with INOCA.

Methods: Core laboratories independently reviewed screening noninvasive stress test results (nuclear imaging, echocardiography, magnetic resonance imaging or nonimaging exercise tolerance testing), and coronary computed tomography angiography (CCTA), blinded to results of the screening test.

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Article Synopsis
  • - The ISCHEMIA-CKD study found that an invasive treatment strategy did not lower the risk of death or nonfatal myocardial infarction (MI) compared to a conservative treatment strategy in patients with advanced chronic kidney disease and stable coronary disease.
  • - MI types were classified using established definitions, revealing a 3-year incidence rate of 11.2% for invasive and 13.6% for conservative strategies, with procedural MIs being more common in the invasive group.
  • - Both type 1 and procedural MIs were associated with significantly increased risks of all-cause death and the initiation of dialysis, highlighting the serious implications of these heart events in patients undergoing different treatment strategies.
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Aims: The International Study of Comparative Health Effectiveness with Medical and Invasive Approaches (ISCHEMIA) trial prespecified an analysis to determine whether accounting for recurrent cardiovascular events in addition to first events modified understanding of the treatment effects.

Methods And Results: Patients with stable coronary artery disease (CAD) and moderate or severe ischaemia on stress testing were randomized to either initial invasive (INV) or initial conservative (CON) management. The primary outcome was a composite of cardiovascular death, myocardial infarction (MI), and hospitalization for unstable angina, heart failure, or cardiac arrest.

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Article Synopsis
  • The ISCHEMIA trial found that an initial invasive treatment strategy did not significantly lower cardiovascular events or overall mortality compared to a conservative approach in patients with stable ischemic heart disease and moderate to severe ischemia.
  • The study evaluated two definitions of myocardial infarction (MI) to analyze procedural events, using different biomarker thresholds and criteria for determining MI occurrences.
  • Results showed that procedural MIs were more common in invasive strategies than conservative ones, with higher percentages for both MI definitions; yet, type 1 MIs were less frequent in patients undergoing invasive treatment.
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Background: Recent studies have demonstrated a dramatic increase in the use of balloon sinus dilation (BSD) in the United States. However, the use of BSD specifically in revision sinus surgery has not been investigated. This study addresses the question of how BSD is utilized as a tool in revision sinus surgery.

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Importance: While many features of stable ischemic heart disease vary by sex, differences in ischemia, coronary anatomy, and symptoms by sex have not been investigated among patients with moderate or severe ischemia. The enrolled ISCHEMIA trial cohort that underwent coronary computed tomographic angiography (CCTA) was required to have obstructive coronary artery disease (CAD) for randomization.

Objective: To describe sex differences in stress testing, CCTA findings, and symptoms in ISCHEMIA trial participants.

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Objective: To construct a comprehensive picture of the typical chronic rhinosinusitis (CRS) patient in the United States including the demographics, comorbidities, and geographic prevalence. The study will also identify the diagnostic and treatment regimens, their cost, and pattern of use for both medically and surgically managed patients.

Study Design: Historical cohort study utilizing private and public payer databases.

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Importance: It is unknown whether coronary revascularization, when added to optimal medical therapy, improves prognosis in patients with stable ischemic heart disease (SIHD) at increased risk of cardiovascular events owing to moderate or severe ischemia.

Objective: To describe baseline characteristics of participants enrolled and randomized in the International Study of Comparative Health Effectiveness With Medical and Invasive Approaches (ISCHEMIA) trial and to evaluate whether qualification by stress imaging or nonimaging exercise tolerance test (ETT) influenced risk profiles.

Design, Setting, And Participants: The ISCHEMIA trial recruited patients with SIHD with moderate or severe ischemia on stress testing.

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The role of host genetic variation in the development of complicated Staphylococcus aureus bacteremia (SAB) is poorly understood. We used whole exome sequencing (WES) to examine the cumulative effect of coding variants in each gene on risk of complicated SAB in a discovery sample of 168 SAB cases (84 complicated and 84 uncomplicated, frequency matched by age, sex, and bacterial clonal complex [CC]), and then evaluated the most significantly associated genes in a replication sample of 240 SAB cases (122 complicated and 118 uncomplicated, frequency matched for age, sex, and CC) using targeted sequence capture. In the discovery sample, gene-based analysis using the SKAT-O program identified 334 genes associated with complicated SAB at p<3.

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Objective: This study uses a large national claims-based database to analyze recent practice patterns related to balloon catheter dilation (BCD) of the sinuses.

Study Design: Retrospective study.

Setting: Academic.

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Objective: Given ongoing debate about the suggested association, the primary objective was to determine if idiopathic sudden sensorineural hearing loss (ISSNHL) was a sentinel event for acute myocardial infarction (AMI) in adults.

Study Design: Case-control study.

Setting: United States MarketScan administrative health claims database.

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Background: In the Targeted Platelet Inhibition to Clarify the Optimal Strategy to Medically Manage Acute Coronary Syndromes (TRILOGY ACS) trial of patients with non-ST-segment elevation acute coronary syndrome managed medically without revascularization, treated with prasugrel versus clopidogrel for less than or equal to 30 months after index acute coronary syndrome, post-hoc analyses showed a divergence of treatment effect in favor of prasugrel after 12 months. Potential influential factors, including a potential late treatment effect after early study drug discontinuation in the intention-to-treat analysis, have not been explored.

Patients And Methods: We carried out an exploratory, post-hoc analysis of 1436 patients who received at least one dose of the study drug and discontinued the drug 7-365 days after randomization.

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Aims: The aim of this study was to determine the net clinical benefit (NCB) of rivaroxaban compared with warfarin in patients with atrial fibrillation.

Methods: This was a retrospective analysis of 14,236 patients included in ROCKET AF who received at least one dose of study drug. We analyzed NCB using four different methods: (1) composite of death, stroke, systemic embolism, myocardial infarction, and major bleeding; (2) method 1 with fatal or critical organ bleeding substituted for major bleeding; (3) difference between the rate of ischemic stroke or systemic embolism minus 1.

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Background: Although conventional wisdom suggests that differences in patient risk profiles drive variability in postoperative pneumonia rates after coronary artery bypass grafting (CABG), this teaching has yet to be empirically tested. We determined to what extent patient risk factors account for hospital variation in pneumonia rates.

Methods: We studied 324,085 patients undergoing CABG between July 1, 2011, and December 31, 2013, across 998 hospitals using The Society of Thoracic Surgeons Adult Cardiac Database.

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Background: The species-specific risk of cardiac device-related infection (CDRI) among bacteremic patients is incompletely understood.

Methods: We conducted a prospective cohort study of hospitalized patients from October 2002 to December 2014 with a cardiac device (CD) and either bacteremia (SAB) or Gram-negative bacteremia (GNB). Cardiac devices were defined as either prosthetic heart valves (PHVs), including valvular support rings, permanent pacemakers (PPMs)/automatic implantable cardioverter defibrillators (AICDs), or left ventricular assist devices (LVADs).

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