Database Open Access

QT Database

Published: Nov. 16, 1999. Version: 1.0.0


When using this resource, please cite the original publication:

Laguna P, Mark RG, Goldberger AL, Moody GB. A Database for Evaluation of Algorithms for Measurement of QT and Other Waveform Intervals in the ECG. Computers in Cardiology 24:673-676 (1997).

Please include the standard citation for PhysioNet:

Goldberger AL, Amaral LAN, Glass L, Hausdorff JM, Ivanov PCh, Mark RG, Mietus JE, Moody GB, Peng C-K, Stanley HE. PhysioBank, PhysioToolkit, and PhysioNet: Components of a New Research Resource for Complex Physiologic Signals (2003). Circulation. 101(23):e215-e220.

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.


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License (for files):
Open Data Commons Attribution License v1.0

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Files

Total uncompressed size: 82.9 MB.

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