Publications by authors named "J A Orchard"
Polygonal billiards exhibit a rich and complex dynamical behavior. In recent years, polygonal billiards have attracted much attention due to their application in the understanding of anomalous transport, but also at the fundamental level, due to their connections with diverse fields in mathematics. We explore this complexity and its consequences on the properties of particle transport in infinitely long channels made of the repetitions of an elementary open polygonal cell.
View Article and Find Full Text PDFBackground: Smartphone electrocardiograms (iECGs) are an innovative method of capturing transient arrhythmias that are occasionally experienced by athletes. This study aimed to assess the accuracy of a 6-lead iECG compared with 12-lead ECG in athletes and those with known genetic heart disease (positive controls).
Research Design And Methods: Each participant had a resting 12-lead ECG (supine) and a 30 s 6-lead iECG (seated) taken within 2 h.
Relative utility of portable ECG devices in capturing arrhythmias in athletes.
Expert Rev Med Devices
December 2024
Introduction: Traditional monitoring of athletes with cardiac symptoms is limited due to sport-specific considerations and the intermittent nature of symptoms. Some portable electrocardiogram (ECG) devices may have more diagnostic utility than traditional monitoring. Their accuracy, advantages, and limitations should be considered when a clinician is considering the most appropriate device for investigation of an athlete's symptoms.
View Article and Find Full Text PDFArticle Synopsis
- - The study analyzed autopsy reports from New South Wales to investigate trends in sudden unexpected cardiovascular (CV) deaths from 2018 to 2022, with a specific focus on how these trends changed during the COVID-19 pandemic.
- - Findings showed a significant increase in CV deaths over these years, with the percentage of CV deaths rising from 18.3% in 2018 to 23.4% in 2022, and a notable rise in sudden arrhythmic death syndrome cases especially in 2021 and 2022.
- - The majority of CV deaths were among males, with younger individuals (average age 42.8) more affected by sudden arrhythmic death syndrome compared to
Objective: Health programs for Indigenous people are most effective, acceptable, and sustainable when Indigenous perspectives are prioritized. Codesign builds on Indigenous people's creativity and propensity to experiment with new technologies and ensures research is designed and implemented in a culturally safe and respectful manner. Limited research has focused on older Indigenous people as partners in digital health.
View Article and Find Full Text PDF