The possibility to remotely use powerful computerized ECG analysis methods at any time is of utmost importance for the early detection of cardiovascular diseases. We present an ECG web services portal that allows to use on request our serial and unary ECG processing methods, CAVIAR and/or the Lyon program. After authentication, the user can upload digital ECG signal data encoded according to SCP-ECG or in a specific ASCII format. The Lyon program (re-) analyses the ECGs and provides SCP-ECG files containing a typical beat, wave onsets and offsets, and a downloadable table of standard ECG measurements. The CAVIAR web service provides a downloadable table of serial measurements and interactive 3D graphical representations of spatio-temporal QRS and T changes between the typical/median beats of the uploaded ECG records or between the uploaded beats, after their optimized superimposition. As a result, precise measures of ECG changes in amplitude, orientation and duration (QRS, QT ...) are obtained, after correction for wave delineation errors by means of spatiotemporal resynchronization of the compared beats. User-defined or automated comparisons with a reference ECG and/or with the earliest or the previous one can be performed. 3D graphic plots of the superimposed QRS and T pairs are displayed in 1, 2, 4, 6 or 9 panels/page. The user can then rotate each plot, or all plots simultaneously, in any 3D direction, to highlight relevant spatiotemporal changes. We present the various functionalities of our FR-ECG web portal http://FR-ECG. univ-lvon1.fr and some results.
