Article list

Investigators: Přibil, Jiří, Přibilová Anna, Frollo, Ivan Parallel measurement of cardiovascular parameters using a photoplethysmographic (PPG) optical sensor and standard portable blood pressure monitors was carried out in various situations of physical and mental stimulation and relaxation. The cardiovascular changes can be detected by the Oliva-Roztočil index values, the instant heart rate and the blood…

Investigators: Svehlikova, J. – Zelinka, J. – Tysler M. – Tino, P. In an informal collaboration with P. Tín from the University of Birmingham, we investigated the possibility of using two parameters simultaneously for non-invasive inverse localization of the stimulation site in a patient with stimulated heart activity using surface ECG maps and chest geometry…

Investigators: ŠVEHLÍKOVÁ, J. – ZELINKA, J. – DOGRUSOZ, Y. S. – GOOD, W. -TYŠLER, M. – BEAR, L. Within the cooperation in the Consortium for ECG imaging (www.ecg-imaging.org) we participated in the study about the influence of ECG signal preprocessing methods on the results of the inverse solutions. Data were provided by IHU-LYRIC, Bordeaux. ECG…

Investigators: Švehlíková, E. Cocherová, J. Zelinka, M. Haška, M. Tyšler The activation of heart ventricles during right ventricular pacing was simulated in realistic patient heart geometry using activation models based on cellular automaton (CA) and reaction-diffusion equations (RD). Using the RD model, also normal ventricular activation was simulated that visually matched with the published experimental…

Investigators: J. Švehlíková, M. Teplan, M. Tyšler In the simulation study, we solved the inverse task of ECG electrocardiography in order to evaluate the possibility of localization of premature ventricular activity (PCA) simulated at 8 different points in a realistic model of the ventricles. We used simulated data provided by the Institute of Biomedical Engineering…

Non-invasive preoperative localization of the site of premature ventricular activation can significantly shorten the time and increase the success of ablation therapy. A method was proposed to locate the lesion by solving the inverse problem of electrocardiography as finding the position of the dipole representing the onset of ectopic activation. The method requires surface ECG…

Investigators: Ján Zelinka, Peter Kaľavský A new subsystem for long-term multi-channel measurement, monitoring and simultaneous recording of measured biological signals was included in the software of the ProCardio 8 system. It is written in C ++ and uses a parallel processing technique that decomposes running tasks into parallel executed modules working in assigned threads. Individual…

(Investigators: J. Švehlíková, J. Zelinka, L. Bachárová, M. Tyšler) Using a computer model of the ventricles, we simulated and visualized the spread of the activation front in the heart chambers at normal rate, in cases of local slowing of the activation queue, thickening of the left ventricular wall and a combination of both factors present…

(Investigators: P. Kaľavský, M. Potse, S. Pezzuto, M. Tyšler) A method for computationally fast simulation of electrical activation of an anisotropic model of the heart based on eikonal equations was proposed. The method was implemented in the parallel programming language CUDA and supports massive parallel computations on graphics processors (GPU). The computational speed of the…