Database Open Access

QT Database

Roger Mark ,  George Moody

Published Nov. 16, 1999 · Version 1.0.0
Please include the standard citation for PhysioNet:

Pollard, T., Moody, B. E., Lehman, L., Gow, B., Fernandes, C., Xie, C., Johnson, A., Mark, R. G., & Heldt, T. (2026). PhysioNet as a global platform for biomedical research. Nature Health. https://doi.org/10.1038/s44360-026-00096-z. Available from: https://rdcu.be/faatM

Abstract

Over 100 fifteen-minute two-lead ECG recordings (many excerpted from other databases), with onset, peak, and end markers for P, QRS, T, and (where present) U waves of from 30 to 50 selected beats in each recording.

Data Description

Each of the 105 records consists of a (text) header file, a (binary) signal file, and up to 9 (binary) annotation files, identified by suffix:

Suffix Meaning
.hea header file, describing signal file contents and format
.dat signal file
.atr reference beat annotations from original database (not available in all cases)
.man reference beat annotations for selected beats only
.q1c manually determined waveform boundary measurements for selected beats (annotator 1 only -- second pass)
.q2c manually determined waveform boundary measurements for selected beats (annotator 2 only -- second pass; available for only 11 records)
.qt1 manually determined waveform boundary measurements for selected beats (annotator 1 only -- first pass)
.qt2 manually determined waveform boundary measurements for selected beats (annotator 2 only -- first pass; available for only 11 records)
.pu automatically determined waveform boundary measurements for all beats (based on both signals)
.pu0 automatically determined waveform boundary measurements for all beats (based on signal 0 only)
.pu1 automatically determined waveform boundary measurements for all beats (based on signal 1 only)

For further details about these files, see the referenced paper.


Files

Total uncompressed size: 82.9 MB.

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