A Metaheuristic Optimization Approach for Parameter Estimation in Arrhythmia Classification from Unbalanced Data
The electrocardiogram records the heart’s electrical activity and generates a significant amount of data. The analysis of these data helps us to detect diseases and disorders via heart bio-signal abnormality classification. In unbalanced-data contexts, where the classes are not equally represented,...
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doaj-b119375c47b24891a3d1df1909544c132020-11-25T03:52:16ZengMDPI AGSensors1424-82202020-06-01203139313910.3390/s20113139A Metaheuristic Optimization Approach for Parameter Estimation in Arrhythmia Classification from Unbalanced DataJuan Carlos Carrillo-Alarcón0Luis Alberto Morales-Rosales1Héctor Rodríguez-Rángel2Mariana Lobato-Báez3Antonio Muñoz4Ignacio Algredo-Badillo5Department of Computer Science, Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE) , Tonantzintla, Puebla 72840, MexicoFaculty of Civil Engineering, Conacyt-Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58030, Michoacán, MexicoTechnological Institute of Culiacan, Culiacan, Sinaloa 80220, MexicoHigher Technological Institute of Libres, Libres, Puebla 73780, MexicoEngineering Department, University of Guadalajara, Av. Independencia Nacional 151, Autlán, Jalisco 48900, MexicoDepartment of Computer Science, Conacyt-Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE) , Tonantzintla, Puebla 72840, MexicoThe electrocardiogram records the heart’s electrical activity and generates a significant amount of data. The analysis of these data helps us to detect diseases and disorders via heart bio-signal abnormality classification. In unbalanced-data contexts, where the classes are not equally represented, the optimization and configuration of the classification models are highly complex, reflecting on the use of computational resources. Moreover, the performance of electrocardiogram classification depends on the approach and parameter estimation to generate the model with high accuracy, sensitivity, and precision. Previous works have proposed hybrid approaches and only a few implemented parameter optimization. Instead, they generally applied an empirical tuning of parameters at a data level or an algorithm level. Hence, a scheme, including metrics of sensitivity in a higher precision and accuracy scale, deserves special attention. In this article, a metaheuristic optimization approach for parameter estimations in arrhythmia classification from unbalanced data is presented. We selected an unbalanced subset of those databases to classify eight types of arrhythmia. It is important to highlight that we combined undersampling based on the clustering method (data level) and feature selection method (algorithmic level) to tackle the unbalanced class problem. To explore parameter estimation and improve the classification for our model, we compared two metaheuristic approaches based on differential evolution and particle swarm optimization. The final results showed an accuracy of 99.95%, a F1 score of 99.88%, a sensitivity of 99.87%, a precision of 99.89%, and a specificity of 99.99%, which are high, even in the presence of unbalanced data.https://www.mdpi.com/1424-8220/20/11/3139electrocardiogram (ECG)signal processingmachine learningarrhythmiaunbalanced |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Juan Carlos Carrillo-Alarcón Luis Alberto Morales-Rosales Héctor Rodríguez-Rángel Mariana Lobato-Báez Antonio Muñoz Ignacio Algredo-Badillo |
spellingShingle |
Juan Carlos Carrillo-Alarcón Luis Alberto Morales-Rosales Héctor Rodríguez-Rángel Mariana Lobato-Báez Antonio Muñoz Ignacio Algredo-Badillo A Metaheuristic Optimization Approach for Parameter Estimation in Arrhythmia Classification from Unbalanced Data Sensors electrocardiogram (ECG) signal processing machine learning arrhythmia unbalanced |
author_facet |
Juan Carlos Carrillo-Alarcón Luis Alberto Morales-Rosales Héctor Rodríguez-Rángel Mariana Lobato-Báez Antonio Muñoz Ignacio Algredo-Badillo |
author_sort |
Juan Carlos Carrillo-Alarcón |
title |
A Metaheuristic Optimization Approach for Parameter Estimation in Arrhythmia Classification from Unbalanced Data |
title_short |
A Metaheuristic Optimization Approach for Parameter Estimation in Arrhythmia Classification from Unbalanced Data |
title_full |
A Metaheuristic Optimization Approach for Parameter Estimation in Arrhythmia Classification from Unbalanced Data |
title_fullStr |
A Metaheuristic Optimization Approach for Parameter Estimation in Arrhythmia Classification from Unbalanced Data |
title_full_unstemmed |
A Metaheuristic Optimization Approach for Parameter Estimation in Arrhythmia Classification from Unbalanced Data |
title_sort |
metaheuristic optimization approach for parameter estimation in arrhythmia classification from unbalanced data |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2020-06-01 |
description |
The electrocardiogram records the heart’s electrical activity and generates a significant amount of data. The analysis of these data helps us to detect diseases and disorders via heart bio-signal abnormality classification. In unbalanced-data contexts, where the classes are not equally represented, the optimization and configuration of the classification models are highly complex, reflecting on the use of computational resources. Moreover, the performance of electrocardiogram classification depends on the approach and parameter estimation to generate the model with high accuracy, sensitivity, and precision. Previous works have proposed hybrid approaches and only a few implemented parameter optimization. Instead, they generally applied an empirical tuning of parameters at a data level or an algorithm level. Hence, a scheme, including metrics of sensitivity in a higher precision and accuracy scale, deserves special attention. In this article, a metaheuristic optimization approach for parameter estimations in arrhythmia classification from unbalanced data is presented. We selected an unbalanced subset of those databases to classify eight types of arrhythmia. It is important to highlight that we combined undersampling based on the clustering method (data level) and feature selection method (algorithmic level) to tackle the unbalanced class problem. To explore parameter estimation and improve the classification for our model, we compared two metaheuristic approaches based on differential evolution and particle swarm optimization. The final results showed an accuracy of 99.95%, a F1 score of 99.88%, a sensitivity of 99.87%, a precision of 99.89%, and a specificity of 99.99%, which are high, even in the presence of unbalanced data. |
topic |
electrocardiogram (ECG) signal processing machine learning arrhythmia unbalanced |
url |
https://www.mdpi.com/1424-8220/20/11/3139 |
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