tirandazdylan/ptb-xl-ecg

PTB-XL 12-lead ECGs with SCP-ECG statements

The 21,799 clinical 10-second 12-lead ECGs of PTB-XL 1.0.3 at 500 Hz, one row per record, with the cardiologists' SCP-ECG statements. No new annotation was made.

Split	PTB-XL folds	Records	Patients	Records without a reference statement
train	1-8	17418	15023	4
validation	9	2183	1942	3
test	10	2198	1904	0

Splits follow the source's recommendation (strat_fold 1-8 train, 9 validation, 10 test). The source made the folds per patient, so no patient spans two splits; the records of folds 9 and 10 were checked by at least one cardiologist.

Fields

• ecg_id, patient_id: the source identifiers.
• age: years at the recording; 300 means over 89 years (the source's HIPAA convention). Null when unknown.
• sex: M or F (the source's 0 and 1).
• height, weight: cm and kg when known.
• strat_fold: the source's fold, 1-10.
• validated_by_human: whether a cardiologist checked the statements.
• report: the source's free-text report (German, some English).
• scp_codes: JSON object of SCP-ECG statement code to likelihood (0, 15, 35, 50, 80 or 100). The source sets 0 when no likelihood was recorded, which is the case for nearly every rhythm and form statement.
• statements: the reference statement set of the ecg-read environment, sorted: every code of scp_codes with likelihood at least 50 or exactly 0 (not recorded). Codes with a low recorded likelihood (15 or 35) are left out. Empty for a record whose statements all have a low likelihood.
• superclasses, subclasses: the diagnostic_class and diagnostic_subclass of the diagnostic codes in statements, from scp_statements.csv, sorted.
• fs: 500. leads: the 12 lead names in the row order of signal: I, II, III, AVR, AVL, AVF, V1-V6.
• signal: float32 array of shape (12, 5000) in millivolts, read from the records500 WFDB files with wfdb.

scp_statements.csv is the source's codebook, unchanged: the 71 statements with their kind (diagnostic, form, rhythm), diagnostic class and subclass, and description.

Changes from the source

• Source: PTB-XL, a large publicly available electrocardiography dataset, version 1.0.3 on PhysioNet, CC BY 4.0. Only the 500 Hz records are used; the 100 Hz copies are not.
• WFDB signals converted to float32 millivolt arrays, leads as rows. Metadata columns kept with the names above; sex written as letters, scp_codes as JSON. The source's nurse, site, device, recording_date, heart_axis, infarction stadium, signal-quality and file-name columns are not copied.
• statements, superclasses and subclasses are derived from scp_codes and scp_statements.csv as described.

Citation

@article{wagner2020ptbxl,
  title={PTB-XL, a large publicly available electrocardiography dataset},
  author={Wagner, Patrick and Strodthoff, Nils and Bousseljot, Ralf-Dieter and Kreiseler, Dieter and Lunze, Fatima I. and Samek, Wojciech and Schaeffter, Tobias},
  journal={Scientific Data},
  volume={7},
  number={1},
  pages={154},
  year={2020},
  doi={10.1038/s41597-020-0495-6}
}
@article{PhysioNet-ptb-xl-1.0.3,
  author={Wagner, Patrick and Strodthoff, Nils and Bousseljot, Ralf-Dieter and Samek, Wojciech and Schaeffter, Tobias},
  title={PTB-XL, a large publicly available electrocardiography dataset (version 1.0.3)},
  journal={PhysioNet},
  year={2022},
  doi={10.13026/kfzx-aw45}
}
@article{goldberger2000physiobank,
  title={PhysioBank, PhysioToolkit, and PhysioNet: Components of a New Research Resource for Complex Physiologic Signals},
  author={Goldberger, Ary L. and Amaral, Luis A. N. and Glass, Leon and Hausdorff, Jeffrey M. and Ivanov, Plamen Ch. and Mark, Roger G. and Mietus, Joseph E. and Moody, George B. and Peng, Chung-Kang and Stanley, H. Eugene},
  journal={Circulation},
  volume={101},
  number={23},
  pages={e215--e220},
  year={2000},
  doi={10.1161/01.CIR.101.23.e215}
}