Sensitivity Analysis of Ventricular Activation and Electrocardiogram in Tailored Models of Heart-Failure Patients

Abstract : Cardiac resynchronization therapy is not effective in a variable proportion of heart failure patients. An accurate knowledge of each patient's electroanatomical features could be helpful to determine the most appropriate treatment. The goal of this study was to analyze and quantify the sensitivity of left ventricular (LV) activation and the electrocardiogram (ECG) to changes in 39 parameters used to tune realistic anatomical-electrophysiological models of the heart. Electrical activity in the ventricles was simulated using a reaction-diffusion equation. To simulate cellular electrophysiology, the Ten Tusscher-Panfilov 2006 model was used. Intracardiac electrograms and 12-lead ECGs were computed by solving the bidomain equation. Parameters showing the highest sensitivity values were similar in the six patients studied. QRS complex and LV activation times were modulated by the sodium current, the cell surface-to-volume ratio in the LV, and tissue conductivities. The T-wave was modulated by the calcium and rectifier-potassium currents, and the cell surface-to-volume ratio in both ventricles. We conclude that homogeneous changes in ionic currents entail similar effects in all ECG leads, whereas the effects of changes in tissue properties show larger inter-lead variability. The effects of parameter variations are highly consistent between patients and most of the model tuning could be performed with only ~10 parameters.
Type de document :
Pré-publication, Document de travail
accepted for publication in Medical & Biological Engineering and Computing. 2017
Liste complète des métadonnées

Littérature citée [58 références]  Voir  Masquer  Télécharger

https://hal.inria.fr/hal-01567886
Contributeur : Mark Potse <>
Soumis le : lundi 24 juillet 2017 - 16:16:16
Dernière modification le : jeudi 11 janvier 2018 - 06:23:41

Fichier

sanchez-sa.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-01567886, version 1

Collections

Citation

Carlos Sánchez, Gabriele D 'Ambrosio, Francesco Maffessanti, Enrico Caiani, Frits Prinzen, et al.. Sensitivity Analysis of Ventricular Activation and Electrocardiogram in Tailored Models of Heart-Failure Patients. accepted for publication in Medical & Biological Engineering and Computing. 2017. 〈hal-01567886〉

Partager

Métriques

Consultations de la notice

141

Téléchargements de fichiers

61