Publications by authors named "Ramesh Nadarajah"

Introduction: People identified as higher risk by a machine learning algorithm (Future Innovations in Novel Detection of Atrial Fibrillation [FIND-AF]) are at increased risk of cardio-renal-metabolic-pulmonary disease and cardiovascular death. The OPTIMISE-1 randomised controlled trial aims to test the effect of community-based specialist-led identification and management of cardio-renal-metabolic-pulmonary (CRMP) disease and risk factors compared with usual care on the use of therapeutic interventions over a follow-up of 6 months among high FIND-AF risk community-dwelling individuals.

Methods And Analysis: OPTIMISE-1 is a multicentre, pragmatic, prospective, randomised, open-label, blinded-endpoint strategy trial that will recruit 138 participants aged 30 years or older, with a high FIND-AF risk score and previously enrolled in the FIND-AF pilot study (NCT05898165), to be randomised 1:1 to a specialist-led care intervention or usual care.

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Background: Randomized clinical trials from over 20 years ago demonstrated that an implantable cardioverter defibrillator (ICD) improved survival for patients with severely reduced left ventricular ejection fraction (LVEF) after myocardial infarction (MI) compared with optimal medical therapy (OMT) alone. Since then advances in therapy have led to the reduction in the incidence of sudden cardiac death (SCD) in this population, whilst complication rates from ICD implantation are still substantial.

Objectives: To determine whether OMT without ICD implantation is not inferior to OMT with ICD implantation with respect to all-cause mortality.

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Background: The effectiveness of risk stratification using the Global Registry of Acute Coronary Events (GRACE) Risk Score (GRS) for patients presenting to hospital with suspected non-ST elevation acute coronary syndrome (NSTEACS) according to troponin elevation is unknown.

Methods: Post hoc analysis of a phase 3 parallel group cluster randomised controlled trial (UK GRACE Risk Score, UKGRIS) of adult patients presenting with suspected NSTEACS to 42 hospitals in England between 9 March 2017 and 30 December 2019, with hospitals randomised (1:1) to standard care or according to the GRS and associated guidelines. Coprimary outcome measures were use of guideline-recommended management and time to the composite of cardiovascular death, non-fatal myocardial infarction, new-onset heart failure hospitalisation or readmission for cardiovascular event at a minimum of 24 months follow-up.

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Background: Outcome measure choice and definition can determine the result of the study. We describe outcome measures and their definitions for cardiovascular studies in highly cited medical journals.

Methods: Cardiovascular phase III or IV randomised clinical trials (RCTs) or multicentre observational studies published in the , or between 1 January 2013 and 6 June 2024 from Embase and Ovid Medline were included.

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Aims: Atrial fibrillation (AF) in heart failure with reduced ejection fraction (HFrEF) has prognostic implications. Using a machine learning algorithm (FIND-AF), we aimed to explore clinical events and the cardiac magnetic resonance (CMR) characteristics of the pre-AF phenotype in HFrEF.

Methods And Results: A cohort of individuals aged ≥18 years with HFrEF without AF from the MATCH 1 and MATCH 2 studies (2018-2024) stratified by FIND-AF score.

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Background: Systematic screening individuals with non-invasive devices may improve diagnosis of atrial fibrillation (AF) and reduce adverse clinical events. We systematically reviewed the existing literature to determine the yield of new AF diagnosis associated with systematic AF screening, the relative increase in yield of new AF diagnosis with systematic screening compared to usual care, and the effect of systematic AF screening on clinical outcomes compared with usual care.

Methods: The Medline, Embase, Web of Science and Cochrane Library databases were searched from inception through 1st February 2025 for prospective cohort studies or randomised clinical trials (RCTs) of systematic AF screening with the outcome of incidence of previously undiagnosed AF from screening.

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Aims: We aimed to study the association of five key neighbourhood exposures in large cohort studies and risk of incident cardiovascular disease (CVD).

Methods: We conducted a systematic search of MEDLINE, The Cochrane Library, Web of Science, and Embase from database inception to 20th October 2024. Included studies reported both incident (first-time) CVD diagnosis and neighbourhood exposures across five domains: retail environment; health services; physical environment; pollution; and neighbourhood deprivation.

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Background: Cardiovascular disease is a common comorbidity in chronic obstructive pulmonary disease (COPD). Yet cardiovascular disease and risk is under diagnosed in COPD and is often undertreated, increasing the risk of cardiopulmonary events.

Methods: We formed a Global Working Group of experts in COPD and cardiovascular disease to produce a consensus statement detailing the identification and management of cardiopulmonary risk in patients with COPD.

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Objectives: There is increasing interest in guiding atrial fibrillation (AF) screening by risk rather than age. The perceptions of healthcare professionals (HCPs) towards the implementation of risk prediction models to target AF screening are unknown. We aimed to explore HCP perceptions about using risk prediction models for this purpose, and how models could be implemented.

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Background: Detecting atrial fibrillation (AF) after stroke is a key component of secondary prevention, but indiscriminate prolonged cardiac monitoring is costly and burdensome. Multivariable prediction models could be used to inform selection of patients.

Objective: This study aimed to determine the performance of available models for predicting AF after a stroke.

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Article Synopsis
  • The EuroHeart project aims to establish standardized definitions for outcome measures in cardiovascular clinical studies to enhance the evaluation of medical interventions and care.
  • A group of 82 experts formed five Working Groups to identify key outcome measures for various cardiovascular conditions, using a systematic review and consensus methods to define these measures.
  • In total, 24 mandatory (Level 1) and 48 optional (Level 2) outcome measures were established across five cardiovascular disease areas, providing a foundation for improved research and patient care quality.
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Traditionally, machine learning-based clinical prediction models have been trained and evaluated on patient data from a single source, such as a hospital. Cross-validation methods can be used to estimate the accuracy of such models on new patients originating from the same source, by repeated random splitting of the data. However, such estimates tend to be highly overoptimistic when compared to accuracy obtained from deploying models to sources not represented in the dataset, such as a new hospital.

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Article Synopsis
  • * A working group, including experts from the European Society of Cardiology, conducted a systematic review and reached consensus on mandatory (Level 1) and optional (Level 2) measures through a Delphi process.
  • * The final catalogue includes five Level 1 and two Level 2 outcome measures, along with five additional monitoring outcomes, which will enhance research quality and improve heart failure care.
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Article Synopsis
  • * The study will recruit approximately 1955 participants for home-based ECG monitoring, and will conduct comprehensive assessments, including physical exams and advanced imaging techniques.
  • * The research aims to identify how other health issues affect AF development, find prevention strategies, and establish a foundation for future clinical trials on AF detection and prevention.
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Article Synopsis
  • - This study investigates the effects of scoliosis surgery on various outcomes (respiratory function, motor function, weight, pain, and patient satisfaction) in patients with spinal muscular atrophy (SMA), highlighting the lack of research on these secondary outcomes.
  • - Results showed significant improvement in respiratory function for SMA2 patients postsurgery, but some experienced drops in gross motor scores and weight, with many reporting postsurgical pain, especially hip-related.
  • - Despite these challenges, patients and parents expressed overall satisfaction with the surgery's impact on posture and appearance, emphasizing the need for better postoperative care, including physiotherapy and support services.
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Background: Health-related quality of life (HRQoL) for patients following myocardial infarction (MI) is frequently impaired. We investigated the association of baseline and changes in HRQoL with mortality following MI.

Methods And Results: Nationwide longitudinal study of 9474 patients admitted to 77 hospitals in England as part of the Evaluation of the Methods and Management of Acute Coronary Events study.

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Background: Older people less frequently receive invasive coronary angiography (ICA) for NSTEMI than younger patients. We describe care, ICA data, and in-hospital and 30-day outcomes of NSTEMI by age in a contemporary and geographically diverse cohort.

Methods: Prospective cohort study including 2947 patients with NSTEMI from 287 centres in 59 countries, stratified by age (≥75 years, n = 761).

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Background: Chronic kidney disease (CKD) is a major global health problem and its early identification would allow timely intervention to reduce complications. We performed a systematic review and meta-analysis of multivariable prediction models derived and/or validated in community-based electronic health records (EHRs) for the prediction of incident CKD in the community.

Methods: Ovid Medline and Ovid Embase were searched for records from 1947 to 31 January 2024.

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Background: The increasing burden of atrial fibrillation (AF) emphasizes the need to identify high-risk individuals for enrolment in clinical trials of AF screening and primary prevention. We aimed to develop prediction models to identify individuals at high-risk of AF across prediction horizons from 6-months to 10-years.

Methods: We used secondary-care linked primary care electronic health record data from individuals aged ≥30 years without known AF in the UK Clinical Practice Research Datalink-GOLD dataset between January 2, 1998 and November 30, 2018; randomly divided into derivation (80%) and validation (20%) datasets.

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Article Synopsis
  • Heart failure (HF) is becoming more prevalent and can lead to serious health issues and increased healthcare costs, but many cases go undetected until severe symptoms appear and hospitalization is needed.
  • Researchers are developing a prediction model using electronic health records (EHRs) to estimate the risk of new-onset HF over different time spans (1, 5, and 10 years) by applying various methods like logistic regression and machine learning.
  • The study has received ethical approval and aims to publish its findings in a peer-reviewed journal, with the trial registered on Clinical Trials.gov and a systematic review on PROSPERO.
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