Nonlinear model-based cardiac arrhythmia diagnosis using the optimization-based inverse problem solution

Maryam Gholami; Mahsa Maleki; Saeed Amirkhani; Ali Chaibakhsh

doi:10.1007/s13534-022-00223-1

Nonlinear model-based cardiac arrhythmia diagnosis using the optimization-based inverse problem solution

Biomed Eng Lett. 2022 Mar 7;12(2):205-215. doi: 10.1007/s13534-022-00223-1. eCollection 2022 May.

Authors

Maryam Gholami¹, Mahsa Maleki^{2

3}, Saeed Amirkhani^{2

3}, Ali Chaibakhsh^{2

3}

Affiliations

¹ Department of Engineering, Islamic Azad University of Kazerun, Kazerun, Fars Iran.
² Faculty of Mechanical Engineering, University of Guilan, P.O. Box 41938-33697, Rasht, Guilan Iran.
³ Intelligent Systems and Advanced Control Lab, University of Guilan, Rasht, Guilan 41996-13776 Iran.

Abstract

This study investigates a nonlinear model-based feature extraction approach for the accurate classification of four types of heartbeats. The features are the morphological parameters of ECG signal derived from the nonlinear ECG model using an optimization-based inverse problem solution. In the model-based methods, high feature extraction time is a crucial issue. In order to reduce the feature extraction time, a new structure was employed in the optimization algorithms. Using the proposed structure has considerably increased the speed of feature extraction. In the following, the effectiveness of two types of optimization methods (genetic algorithm and particle swarm optimization) and the McSharry ECG model has been studied and compared in terms of speed and accuracy of diagnosis. In the classification section, the adaptive neuro-fuzzy inference system and fuzzy c-mean clustering methods, along with the principal component analysis data reduction method, have been utilized. The obtained results reveal that using an adaptive neuro-fuzzy inference system with data obtained from particle swarm optimization will have the shortest process time and the best diagnosis, with a mean accuracy of 99% and a mean sensitivity of 99.11%.

Keywords: Arrhythmia classification; ECG dynamical model; Feature extraction; Inverse solution.