Automated Identification of Label Errors in Large Electrocardiogram Datasets

Peter Doggart, Alan Kennedy, Emily Foreman, D Finlay, RR Bond

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)
19 Downloads (Pure)

Abstract

Background: Training and testing Deep Neural Networks
(DNNs) for automated electrocardiogram (ECG)
interpretation requires large datasets. These datasets
are commonly extracted at scale from Electronic Health
Records (EHRs). Typically, a single physician over-reads
the machine generated interpretation as part of standard
care. Incorrect interpretation of the ECG occurs frequently,
reducing the quality of the labels.
Method: We trained a DNN to identify seven ECG
rhythms based on morphology; Sinus Rhythm, Junctional
Rhythm, Ectopic Atrial Rhythm, Atrial Flutter, Atrial Fibrillation,
Ventricular Rhythm and Pacemaker. The DNN
was trained on a dataset of 368,202 ECGs taken from a
proprietary database. We then applied confident learning
techniques using the DNN to identify label errors in the
Physionet PTB-XL database, which is publicly available.
Results: The confident learning algorithm identified 515
potential rhythm label errors in the 21,837 ECGs in PTBXL
database (2.36%). The labels were sorted by the likelihood
of label error based on the self-confidence score, and
the top 200 ECGs were manually reviewed. Of these 200
ECGs, 158 were found to be incorrectly labelled (79%).
Confident learning successfully corrected the label in 156
cases (78%). The estimated labelling error
Original languageEnglish
Number of pages4
DOIs
Publication statusAccepted/In press - 13 Jun 2022
EventComputing in Cardiology - Tampere, Finland, Tampere, Finland
Duration: 4 Sept 20227 Sept 2022

Conference

ConferenceComputing in Cardiology
Country/TerritoryFinland
CityTampere
Period4/09/227/09/22

Keywords

  • AI
  • ECG
  • Digital health

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