Publications by authors named "Niall G Mahon"

Aims: Many European healthcare providers struggle to adopt multidisciplinary, integrated care pathways for people with heart failure (HF) as recommended by the European Society of Cardiology. PRO-HF (Program to Optimize Heart Failure Patient Pathways) was developed to help clinicians identify strengths, gaps, and shortcomings in their HF pathways and support tailored interventions to optimize pathways and enhance patient care. We report initial findings from baseline assessments of HF pathway characteristics and challenges from 10 hospitals in six European countries (France, Ireland, Portugal, Spain, The Netherlands, and United Kingdom).

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Aims: In the SIRONA 2 trial, the safety and efficacy of pulmonary artery (PA) pressure (PAP)-guided heart failure (HF) management using a novel PAP sensor were assessed at 30 and 90 days, respectively, and both endpoints were met. The current study examines the prespecified secondary endpoints of safety and accuracy of the PA sensor along with HF hospitalizations and mortality, HF symptoms, functional capacity, quality of life, and patient compliance through 12 months.

Methods And Results: SIRONA 2 is a prospective, multi-centre, open-label, single-arm trial evaluating the Cordella™ PA Sensor System in 70 patients with New York Heart Association (NYHA) functional class III HF with a prior HF hospitalization and/or increase of N-terminal pro-brain natriuretic peptide within 12 months of enrolment.

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Aims: Implantable pulmonary artery pressure (PAP) sensors have been shown to reduce heart failure hospitalizations (HFH) in selected patients. The goal of this study was to evaluate the safety and efficacy of a novel wireless PAP monitoring system in patients with heart failure (HF).

Methods And Results: This is a prospective, multi-centre, open-label, single-arm trial evaluating the safety and efficacy of the Cordella™ PA Sensor System including the comprehensive Cordella™ Heart Failure System (CHFS) in patients with New York Heart Association (NYHA) Class III heart failure with a heart failure hospitalization and/or increase of N-terminal pro-Brain Natriuretic Peptide (NT-proBNP) within 12 months of enrolment.

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Background: Atherosclerosis is a chronic inflammatory disease driven by macrophage accumulation in medium and large sized arteries. Macrophage polarization and inflammation are governed by microRNAs (miR) that regulate the expression of inflammatory proteins and cholesterol trafficking. Previous transcriptomic analysis led us to hypothesize that miR-155-5p (miR-155) is regulated by conjugated linoleic acid (CLA), a pro-resolving mediator which induces regression of atherosclerosis .

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Background: Palliative care needs of patients with chronic heart failure are poorly recognised. Policy makers advise a patient-centred approach to holistically assess patients' needs and care goals. Patient-reported outcome measures are proposed to facilitate patient-centred care.

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Unlabelled: Patients with chronic heart failure (CHF) have symptoms and concerns which are inadequately addressed. Patient-reported outcome measures (PROMs) can potentially improve the identification and management of advanced symptoms and palliative concerns. However, these have not been used in CHF.

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Background: Recruitment challenges contribute to the paucity of palliative care research with advanced chronic heart failure patients.

Aim: To describe the challenges and outline strategies of recruiting advanced chronic heart failure patients.

Design: A feasibility study using a pre-post uncontrolled design.

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Objectives: High sensitivity cardiac troponin T and I (hs-cTnT and hs-cTnI) assays show analytical, diagnostic and prognostic improvement over contemporary sensitive cTn assays. However, given the importance of troponin in the diagnosis of myocardial infarction, implementing this test requires rigorous analytical and clinical verification across the total testing pathway. This was the aim of this study.

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Objective: To ascertain whether a name can influence a person's health, by assessing whether people with the surname "Brady" have an increased prevalence of bradycardia.

Design: Retrospective, population based cohort study.

Setting: One university teaching hospital in Dublin, Ireland.

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Background: The detection of elevations in cardiorenal biomarkers, such as troponins, B-type natriuretic peptides (BNPs), and neutrophil gelatinase-associated lipocalins, are associated with poor outcomes in patients hospitalized with acute heart failure. Less is known about the association of these markers with adverse events in chronic right ventricular dysfunction due to pulmonary hypertension, or whether their measurement may improve risk assessment in the outpatient setting.

Methods And Results: We performed a cohort study of 108 patients attending the National Pulmonary Hypertension Unit in Dublin, Ireland, from 2007 to 2009.

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Background: Hypertrophic cardiomyopathy (HCM) is a genetic condition, and relatives of affected persons may be at risk. Cardiac troponin biomarkers have previously been shown to be elevated in HCM. This study examines the new highly-sensitive cardiac troponin I (hsTnI) assay in a HCM screening population.

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Aims: To determine if newer criteria for diagnosing and staging acute kidney injury (AKI) during heart failure (HF) admission are more predictive of clinical outcomes at 30 days and 1 year than the traditional worsening renal function (WRF) definition.

Methods: We analyzed prospectively collected clinical data on 637 HF admissions with 30-day and 1-year follow-up. The incidence, stages, and outcomes of AKI were determined using the following four definitions: KDIGO, RIFLE, AKIN, and WRF (serum creatinine rise ≥0.

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Aims: Sudden arrhythmic death syndrome (SADS) occurs when a person suffers a sudden, unexpected death, with no cause found at postmortem examination. We aimed to describe the cardiac screening outcomes in a population of relatives of SADS victims

Methods And Results: Prospective and retrospective cohort study of consecutive families attending the Family Heart Screening clinic at the Mater Misericordiae Hospital in Dublin, Ireland, from January 2007 to September 2011. Family members of SADS victims underwent a standard screening protocol.

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Background: Family-based cardiac screening programmes for persons at risk for genetic cardiac diseases are now recommended. However, the psychological wellbeing and health related quality of life (QoL) of such screened patients is poorly understood, especially in younger patients. We sought to examine wellbeing and QoL in a representative group of adults aged 16 and over in a dedicated family cardiac screening clinic.

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Aim: To describe the natural history, management and outcomes of peripartum cardiomyopathy (PPCM) in an unselected Northern European population.

Methods: A retrospective single-center observational study was performed at a tertiary referral heart failure and transplantation unit. Outcomes measured were baseline demographics, clinical presentation, course, and treatment.

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Aims: The prevalence of lead failures is increasing with a growing population of implantable cardioverter defibrillator (ICD) recipients. The cost of managing defibrillator lead failures requires investigation.

Methods And Results: A retrospective cohort study of patients requiring lead replacement for defibrillator lead failure was performed.

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Aims: The aim of this study was to investigate the frequency of corrected QT interval (QTc) prolongation in a methadone maintenance therapy (MMT) population, and to examine potential associations between this QTc interval and methadone dose as well as concurrent use of opiates, cocaine and benzodiazepines.

Design: Cross-sectional study of patients attending a specialist drug treatment clinic from July 2008 to January 2009.

Setting: Single-centre inner-city specialist drug treatment clinic, Ireland.

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Aims: To test the hypothesis that the QS interval of ventricular ectopic beats (VEBs) (ventricular ectopic QS interval, VEQSI) would provide a marker for the presence of structural heart disease and a predictor of mortality.

Methods And Results: We interviewed and examined 2332 patients undergoing Holter ECG monitoring for clinical indications. In persons with VEBs, the morphologies were counted and the QS interval was measured for each of these morphologies.

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Background: In autoimmune disorders, circulating autoantibodies identify healthy relatives at risk years before clinical presentation. Healthy relatives of patients with dilated cardiomyopathy (DCM) who have echocardiographic changes, including left ventricular enlargement or depressed fractional shortening at baseline, have increased medium-term risk for DCM development. Approximately one third of relatives have serum anti-heart autoantibodies (AHAs) at baseline; we intended to assess their potential role in predicting DCM development.

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Background: Idiopathic dilated cardiomyopathy is often familial, and apparently healthy relatives may have latent, early, or undiagnosed established disease.

Objective: To determine the prevalence and natural history of asymptomatic cardiac abnormalities among sampled relatives of unselected patients referred for management of dilated cardio-myopathy.

Design: Prospective cohort study.

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Article Synopsis
  • The study reviews outcomes of patients evaluated for heart transplant at a tertiary center between 1995 and 2000, highlighting the challenges posed by limited donor organs.
  • About 50% were recommended for medical treatment, 17% for nontransplant surgery, and only 36% were listed for transplantation.
  • Notably, less than 20% of those referred for transplant were actually transplanted, but medium-term survival rates for those undergoing alternative surgical strategies were comparable to those who received transplants.
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