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Describes the following awardfs: Rosanna Degani Young Investigator Award; the Gary and Bill Sanders Poster Awards; and the PhysioNet/Computing in Cardiology Challenge 2013.
Once again, it is a pleasure for me to write a foreword to the Proceedings of a Computing in Cardiology Conference, this time the 40th annual meeting which was held in Zaragoza from September 22nd – 25th, 2013. I have pointed out in the past that a huge amount of work is undertaken by the Editor of the Proceedings, Alan Murray, and Editorial Assistant Cathie D'Amico, and this year is no exception...
An increase in the dispersion of action potential duration restitution (APDR) has been associated with higher propensity to suffer from ventricular arrhythmias and sudden cardiac death (SCD). Recently, a marker, Δα, was proposed to non-invasively quantify APDR dispersion from the electrocardiogram (ECG) by computing the ratio between differences in the T-peak-to-T-end (Tpe) and RR intervals at different...
The aim of this study is to elucidate the correlation between coronary artery angulation and local mechanical forces at the vicinity of bifurcation using a coupled fluid-structure interaction (FSI) modelling approach. Four representative left coronary arteries with different angles ranging from 75° to 120° were used to demonstrate the relation between circumferential stress and...
Background. The ECG is important for diagnosis and triage in the hyperacute phase of acute coronary syndrome (ACS), especially during the “golden hours”, when myocardial salvage possibilities are largest. An important triaging decision is whether or not a patient requires primary PCI, for which the guidelines mention ST elevation (STE) in the ECG as major criterion. This criterion has, however, a...
Quantification of descending aorta atheromas (AT) with 2D transesophageal echocardiography (TEE) is time-consuming and underestimates plaque burden, while 3D TEE can provide the basis for analysis of AT 3D dimensions and volume. We developed a novel semi-automated algorithm to detect aortic AT in 3D TEE, to quantify their severity and volume and tested its accuracy compared to an expert gold standard...
This paper describes LightWAVE, recently-developed open-source software for viewing ECGs and other physiologic waveforms and associated annotations (event markers). It supports efficient interactive creation and modification of annotations, capabilities that are essential for building new collections of physiologic signals and time series for research.
This study aimed to develop a user-friendly, modular and scalable web-based system, that would allow researchers and physicians to upload and save cardiac signals into a custom database, and would perform a complete heart rate variability (HRV) and heart rate turbulence (HRT) analysis of each anonymous RR-interval time series from holter records. The built system, called eLab, complies with the previous...
This paper proposes a watermarking method that can be applied to DICOM images to strengthen its security and privacy. A robust watermark is used to improve the identification/authentication of the image, even if it has been seriously modified, semifragile watermarks are used to embed information intended to vanish if the image losses its clinical/research value, and fragile watermarks are used to...
Background: Wave intensity analysis (WIA) is a technique that is used for the evaluation of the working condition of the heart and the arterial system. Simultaneous measurements of blood pressure (P) and velocity (U) are required for calculating wave intensity (dI), which can also be determined non-invasively using U and diameter (D) of the vessel at the measurement site. The technique allows for...
This project aimed at designing and developing a system for following-up cardiovascular patients integrating a social media (Twitter) and a healthcare communications standard (HL7 v2.x). Two applications - an android-based tool for gathering and tweeting vital cardiovascular signs and a Java-based desktop tool for receiving and parsing the information - were created within the framework of this project...
Non-invasive measures of the fetal ECG provide quantitative information on pacemaking rate, propagation times and velocities during normal sinus rhythm.
The atrioventricular (AV) node is a specialised region of the cardiac conduction system, allowing electrical excitation to propagate from the atria to the ventricles. AV block occurs when the AV node prevents electrical excitation waves reaching the ventricles, ultimately leading to a decrease in cardiac output. HCN4 and SCN5A defects have been associated with AV block, but the mechanisms underlying...
Aims: In the focus of this study stand the fibroblast cells that under physiological terms are providing structural support for the heart, but under patho-physiological conditions they can obstruct the pacemaker activity and the excitation spread function of the heart that may develop arrhythmia.
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