Publications by authors named "Luke Dawson"

Article Synopsis
  • The study investigates how daily mean temperature and common pollutants relate to atrial fibrillation (AF) cases in emergency departments from 2014 to 2020.
  • It analyzed data from over 82,000 AF presentations and found that elevated levels of Particulate Matter (PM 2.5) and nitrous dioxide (NO2) significantly increased AF cases, while temperature and other pollutants did not have a notable effect.
  • The findings suggest that higher PM 2.5 and NO2 levels contribute to increased AF risk, highlighting the need for better environmental policies and patient guidance in areas with elevated pollution levels.
View Article and Find Full Text PDF
Article Synopsis
  • The study investigates long-term survival outcomes for patients with severe ischaemic cardiomyopathy who underwent either coronary artery bypass grafting (CABG) or percutaneous coronary intervention (PCI) due to a lack of recent trial data.
  • Using records from Australian and New Zealand cardiac registries between 2005 and 2018, researchers analyzed data from 2042 patients, with 1451 treated by CABG and 591 by PCI, adjusting for various risk factors.
  • Results showed CABG patients had significantly lower long-term mortality compared to those who received PCI, although there were no differences in in-hospital mortality; however, CABG was associated with a higher risk of peri-procedural strokes and a longer hospital stay
View Article and Find Full Text PDF

Since the term AI (artificial intelligence) was first coined, it has become embedded in modern life, with debate focusing on its challenges. In dentistry, AI is being used in clinical and education practice; however, many educators have limited knowledge or skills in its use. The British Alliance of Researchers in Dental Education and Scholarship hosted an AI-themed conference in November 2023.

View Article and Find Full Text PDF

Background: Patients with shock treated by emergency medical services (EMS) have high morbidity and mortality. Knowledge of prehospital factors predicting outcomes in patients with shock remains limited. We aimed to describe the prehospital predictors of mortality in patients with non-traumatic shock transported to hospital by EMS.

View Article and Find Full Text PDF

Background: Coronary disease complexity is commonly used to guide revascularization strategy in patients with multivessel disease (MVD).

Objectives: The aim of this study was to assess the interactive effects of coronary complexity on percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG) outcomes and identify the optimal threshold at which PCI can be considered a reasonable option.

Methods: A total of 1,444 of 1,500 patients with MVD from the FAME (Fractional Flow Reserve versus Angiography for Multi-vessel Evaluation) 3 randomized trial were included in the analysis (710 CABG vs 734 PCI).

View Article and Find Full Text PDF

We present the case of an 82-year-old woman with persistent fatigue, exertional dyspnea, and dizziness related to a paravalvular leak following a self-expanding transcatheter aortic valve replacement. Successful closure was performed using a steerable sheath to negotiate a vascular plug closure device through the self-expanding valve structure.

View Article and Find Full Text PDF

The role of the dental therapist has evolved over the course of the past 70 years, both in the UK and across the globe. The General Dental Council's Scope of practice guidance sets out the skills and abilities of each of the professional roles within the dental team, including the dental therapist. Scope of practice of the multidisciplinary team remains poorly understood, to the detriment of teamworking.

View Article and Find Full Text PDF

Background: Atrial fibrillation (AF) is a growing burden on healthcare resources, despite improvements in prevention and management. AF is a common cause of hospitalisation, and Emergency Medical Services (EMS) use. However, there is a paucity of data describing the burden of AF on EMS.

View Article and Find Full Text PDF

Background: Ten-year risk equations for incident heart failure (HF) are available for the general population, but not for patients with established atherosclerotic cardiovascular disease (ASCVD), which is highly prevalent in HF cohorts. This study aimed to develop and validate 10-year risk equations for incident HF in patients with known ASCVD.

Methods And Results: Ten-year risk equations for incident HF were developed using the United Kingdom Biobank cohort (recruitment 2006-2010) including participants with established ASCVD but free from HF at baseline.

View Article and Find Full Text PDF

Objectives: We aimed to assess the healthcare costs and impact on the economy at large arising from emergency medical services (EMS) treated non-traumatic shock.

Design: We conducted a population-based cohort study, where EMS-treated patients were individually linked to hospital-wide and state-wide administrative datasets. Direct healthcare costs (Australian dollars, AUD) were estimated for each element of care using a casemix funding method.

View Article and Find Full Text PDF

Background: Suboptimal coronary reperfusion (no reflow) is common in acute coronary syndrome percutaneous coronary intervention (PCI) and is associated with poor outcomes. We aimed to develop and externally validate a clinical risk score for angiographic no reflow for use following angiography and before PCI.

Methods: We developed and externally validated a logistic regression model for prediction of no reflow among adult patients undergoing PCI for acute coronary syndrome using data from the Melbourne Interventional Group PCI registry (2005-2020; development cohort) and the British Cardiovascular Interventional Society PCI registry (2006-2020; external validation cohort).

View Article and Find Full Text PDF

Background: Low socioeconomic status (SES) has been linked to poor outcomes in many conditions. It is unknown whether these disparities extend to individuals presenting with dyspnoea. We aimed to evaluate the relationship between SES and incidence, care quality and outcomes among patients attended by emergency medical services (EMS) for dyspnoea.

View Article and Find Full Text PDF

Background: This study examined chest pain epidemiology and care quality for Aboriginal and Torres Strait Islander ('Indigenous') patients presenting to hospital via emergency medical services (EMS) with chest pain.

Methods: State-wide population-based cohort study of consecutive patients attended by ambulance for acute chest pain with individual linkage to emergency, hospital admission and mortality data in the state of Victoria, Australia from January 2015 to June 2019. Multivariable models were used to assess for differences in pre-hospital and hospital adherence to care quality, process measures and clinical outcomes.

View Article and Find Full Text PDF

Aims: Heart failure (HF) is a common cause of morbidity and mortality, related to a broad range of sociodemographic, lifestyle, cardiometabolic, and comorbidity risk factors, which may differ according to the presence of atherosclerotic cardiovascular disease (ASCVD). We assessed the association between incident HF with baseline status across these domains, overall and separated according to ASCVD status.

Methods And Results: We included 5758 participants from the Baker Biobank cohort without HF at baseline enrolled between January 2000 and December 2011.

View Article and Find Full Text PDF

Background: Previous studies examining temporal variations in cardiovascular care have largely been limited to assessing weekend and after-hours effects. We aimed to determine whether more complex temporal variation patterns might exist in chest pain care.

Methods: This was a population-based study of consecutive adult patients attended by emergency medical services (EMS) for non-traumatic chest pain without ST elevation in Victoria, Australia between 1 January 2015 and 30 June 2019.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to evaluate whether early coronary angiography (CAG) improves outcomes in patients who experienced out-of-hospital cardiac arrest (OHCA) without an ST-elevation myocardial infarction (STE) pattern on ECG.
  • Using data from multiple medical databases, researchers analyzed randomized clinical trials comparing early CAG to deferred CAG, focusing on 30-day mortality and other health outcomes.
  • The results showed no significant difference in 30-day mortality or neurological outcomes between the two groups, suggesting that early CAG is not beneficial for these patients.
View Article and Find Full Text PDF

The effective recruitment and randomisation of patients in pre-hospital clinical trials presents unique challenges. Owing to the time critical nature of many pre-hospital emergencies and limited resourcing, the use of traditional methods of randomisation that may include centralised telephone or web-based systems are often not practicable or feasible. Previous technological limitations have necessitated that pre-hospital trialists strike a compromise between implementing pragmatic, deliverable study designs, with robust enrolment and randomisation methodologies.

View Article and Find Full Text PDF

Background: This study aimed to estimate the direct healthcare cost burden of acute chest pain attendances presenting to ambulance in Victoria, Australia, and to identify key cost drivers especially among low-risk patients.

Methods: State-wide population-based cohort study of consecutive adult patients attended by ambulance for acute chest pain with individual linkage to emergency and hospital admission data in Victoria, Australia (1 January 2015-30 June 2019). Direct healthcare costs, adjusted for inflation to 2020-2021 ($A), were estimated for each component of care using a casemix funding method.

View Article and Find Full Text PDF

Background: Discrepancies in cardiovascular care for women are well described, but few data assess the entire patient journey for chest pain care.

Objectives: This study aimed to assess sex differences in epidemiology and care pathways from emergency medical services (EMS) contact through to clinical outcomes following discharge.

Methods: This is a state-wide population-based cohort study including consecutive adult patients attended by EMS for acute undifferentiated chest pain in Victoria, Australia (January 1, 2015, to June 30, 2019).

View Article and Find Full Text PDF

Background: The impact of age on outcomes in cardiogenic shock (CS) is poorly described in the pre-hospital setting. We assessed the impact of age on outcomes of patients treated by emergency medical services (EMS).

Methods: This population-based cohort study included consecutive adult patients with CS transported to hospital by EMS.

View Article and Find Full Text PDF

Aims: The relationship between lower socioeconomic status (SES) and poor cardiovascular outcomes is well described; however, there exists a paucity of data exploring this association in cardiogenic shock (CS). This study aimed to investigate whether any disparities exist between SES and the incidence, quality of care or outcomes of CS patients attended by emergency medical services (EMS).

Methods And Results: This population-based cohort study included consecutive patients transported by EMS with CS between 1 January 2015 and 30 June 2019 in Victoria, Australia.

View Article and Find Full Text PDF

Importance: Prehospital point-of-care troponin testing and paramedic risk stratification might improve the efficiency of chest pain care pathways compared with existing processes with equivalent health outcomes, but the association with health care costs is unclear.

Objective: To analyze whether prehospital point-of-care troponin testing and paramedic risk stratification could result in cost savings compared with existing chest pain care pathways.

Design, Setting, And Participants: In this economic evaluation of adults with acute chest pain without ST-segment elevation, cost-minimization analysis was used to assess linked ambulance, emergency, and hospital attendance in the state of Victoria, Australia, between January 1, 2015, and June 30, 2019.

View Article and Find Full Text PDF