José Luis Rojo-Álvarez

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Objective noise metrics such as the signal to noise ratio and the root mean squared value, are not always related to the actual impact that noise can have on the clinical evaluation of cardiac signals. This work is intended to design a database along with a set of criteria to be used as an initial solid gold-standard of noise severity within a scale created(More)
Cardiac arrhythmias are currently treated with ablation procedures, which are guided by X-ray cameras and intracardiac electrograms (EGM) recordings. Recently, the use of catheters with force sensors have been proposed for improving the contact of the sensing catheter over the heart wall, aiming to guarantee the reliability of electrical measurements.(More)
Optical Mapping (OM) sequences represent a very useful tool for registering cardiac bioelectric activity with high patio-temporal resolution. Conventional preprocessing of OM movies is mostly done with spatio-temporal filters, which could be improved for yielding better signal to noise ratio in the processed images. Also, the multimodal mapping, such as(More)
Doppler ultrasound M-mode images are routinely used in clinical echocardiography, and they have been proposed for non-invasive estimation of the intracardiac pressure gradients in the heart, a process that has been shown to be sensitive to spline interpolation. In this work, we scrutinized the effect of interpolation with a new approach using support vector(More)
A new method for non-uniform interpolation of electro-anatomical cardiac maps from Cardiac Navigation Systems (CNS) is here proposed and benchmarked. We adapted the equations of support vector machines for estimation problems in terms of the two angular dimensions azimuth and elevation and used an autocorrelation kernel. Moreover, the influence of the(More)
Digital analysis of the bio-electrical signals allows us to obtain valuable information for clinical and research purposes. Despite current devices record and store the digital electrical signal, in some cases only a printout version is available. Although previous research focused on algorithms to digitize a scanned version of the printed signal, nowadays(More)
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