Inductive transfer learning from regression to classification in ECG analysis

TL;DR

This paper investigates using synthetic ECG data and transfer learning from regression models to improve classification of cardiac signals, demonstrating enhanced performance and data efficiency in deep learning applications for cardiovascular diagnosis.

Contribution

It introduces a novel transfer learning approach from regression to classification in ECG analysis, leveraging synthetic data to improve model accuracy and data utilization.

Findings

Transfer learning from regression to classification improves accuracy.

Synthetic ECG data effectively trains deep learning models.

Enhanced data efficiency in cardiac signal classification.

Abstract

Cardiovascular diseases (CVDs) are the leading cause of mortality worldwide, accounting for over 30% of global deaths according to the World Health Organization (WHO). Importantly, one-third of these deaths are preventable with timely and accurate diagnosis. The electrocardiogram (ECG), a non-invasive method for recording the electrical activity of the heart, is crucial for diagnosing CVDs. However, privacy concerns surrounding the use of patient ECG data in research have spurred interest in synthetic data, which preserves the statistical properties of real data without compromising patient confidentiality. This study explores the potential of synthetic ECG data for training deep learning models from regression to classification tasks and evaluates the feasibility of transfer learning to enhance classification performance on real ECG data. We experimented with popular deep learning models to predict four key cardiac parameters, namely, Heart Rate (HR), PR interval, QT interval, and QRS complex-using separate regression models. Subsequently, we leveraged these regression models for transfer learning to perform 5-class ECG signal classification. Our experiments systematically investigate whether transfer learning from regression to classification is viable, enabling better utilization of diverse open-access and synthetic ECG datasets. Our findings demonstrate that transfer learning from regression to classification improves classification performance, highlighting its potential to maximize the utility of available data and advance deep learning applications in this domain.