The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The paper introduces an Extended Kalman Smoother (EKS) for T-wave alternans (TWA) detection, based on a dynamical model which is not directly dependent on amplitude (EKS3). In this framework we consider separate states for PQRS and an amplitude-free state model for T-wave. There are some theoretical advantages that EKS3 has over other frameworks recently introduced with the same aims (e.g., EKS6-4obs,...
We present a proof-of-concept of a medical data format for storing and retrieving 12-lead, 10-second standard electrocardiograms (ECG). The new format combines a digital ECG record into a standard graphical report (PDF).
In this study, we investigated the relation between sample entropy (SampEn) of HRV series and the connected theoretical value (SETH), obtained for the autoregressive (AR) models fitted to the same sequences. AR models are commonly used for parametrical spectral analysis and classical HRV spectral parameters were considered as well. The analysis was performed on a subpopulation of the Rate Control...
Drug-induced alterations of ventricular heterogeneity must be limited to avoid induction of lethal ventricular arrhythmias. In here, a new parameter called V-index, able to measure the standard deviation of myocites' repolarization times, was evaluated after moxifloxacin administration. 24-h Holter ECGs of 68 healty subjects enrolled for a thorough QT study were retrospectively analyzed. The placebo...
The V-index is a recently-proposed metric related to repolarization heterogeneity (RH) across the myocardium, a key quantity for the development of arrhythmias. The metric is derived from multi-leads ECG recordings and this paper investigates two of its properties: i) the dependency on the lead system (Frank's orthogonal vs. 12 standard leads); ii) the influence of errors in the location of the T-end...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.