The MIT-BIH Atrial Fibrillation Database

This database is described in

Moody GB, Mark RG. A new method for detecting atrial fibrillation using R-R intervals. Computers in Cardiology. 10:227-230 (1983).

Please cite this publication when referencing this material, and also 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. Circulation 101(23):e215-e220 [Circulation Electronic Pages; http://circ.ahajournals.org/cgi/content/full/101/23/e215]; 2000 (June 13).

This database includes 25 long-term ECG recordings of human subjects with atrial fibrillation (mostly paroxysmal). Of these, 23 records include the two ECG signals (in the .dat files); records 00735 and 03665 are represented only by the rhythm (.atr) and unaudited beat (.qrs annotation files.

The individual recordings are each 10 hours in duration, and contain two ECG signals each sampled at 250 samples per second with 12-bit resolution over a range of ±10 millivolts. The original analog recordings were made at Boston's Beth Israel Hospital (now the Beth Israel Deaconess Medical Center) using ambulatory ECG recorders with a typical recording bandwidth of approximately 0.1 Hz to 40 Hz. The rhythm annotation files (with the suffix .atr) were prepared manually; these contain rhythm annotations of types (AFIB (atrial fibrillation), (AFL (atrial flutter), (J (AV junctional rhythm), and (N (used to indicate all other rhythms). (The original rhythm annotation files, still available in the old directory, used AF, AFL, J, and N to mark these rhythms; the atr annotations in this directory have been revised for consistency with those used for the MIT-BIH Arrhythmia Database.) Beat annotation files (with the suffix .qrs) were prepared using an automated detector and have not been corrected manually. For some records, manually corrected beat annotation files (with the suffix .qrsc) are available. (The .qrs annotations may be useful for studies of methods for automated AF detection, where such methods must be robust with respect to typical QRS detection errors. The .qrsc annotations may be preferred for basic studies of AF itself, where QRS detection errors would be confounding.) Note that in both .qrs and .qrsc files, no distinction is made among beat types (all beats are labelled as if normal).

Until November 2000, only one of the signal files (for record 04936) was available. The original 9-track tapes from 1983 for these records have now been read to produce the other signal files in this directory. In a few cases (04043, 08405, and 08434) isolated data blocks from the original tapes were unreadable. In these cases, the missing data, corresponding to 10.24 seconds for each missing block, have been replaced with a flat segment of samples with amplitudes of zero. See notes.txt for details.

In March 2014, Henian Xia reported that the .qrs annotations were not aligned with the ECG waveforms in record 07859, and investigation showed that 2569 samples appeared to be missing from the beginning of the record. The original annotation file has been renamed 07859.qrs-, and a realigned version of it (without its initial 14 annotations) is available as 07859.qrs. A correctly aligned, manually reviewed annotation file was also produced at that time, and is now available here as 07859.qrsc.

Icon  Name                    Last modified      Size  Description
[PARENTDIR] Parent Directory - [TXT] notes.txt 2000-11-04 14:06 406 [   ] SHA256SUMS 2014-03-04 17:36 9.8K [   ] SHA1SUMS 2014-03-04 17:36 6.7K [   ] RECORDS 2000-03-29 10:00 150 list of record names [   ] MD5SUMS 2014-03-04 17:36 5.7K [   ] ANNOTATORS 2000-11-04 14:16 96 list of annotators [   ] 08455.qrs 1992-07-30 01:19 116K unaudited annotations [   ] 08455.hea- 2000-11-04 12:04 91 header file [   ] 08455.hea 2012-02-14 18:16 99 header file [   ] 08455.dat 2000-11-04 12:04 26M digitized signal(s) [   ] 08455.atr 2001-12-20 11:40 52 reference annotations [   ] 08434.qrs 1992-07-30 01:19 78K unaudited annotations [   ] 08434.hea- 2000-11-04 12:02 100 header file [   ] 08434.hea 2012-02-14 18:16 108 header file [   ] 08434.dat 2000-11-04 12:02 26M digitized signal(s) [   ] 08434.atr 2001-12-20 11:40 92 reference annotations [   ] 08405.qrs 1992-07-30 01:19 115K unaudited annotations [   ] 08405.hea- 2000-11-04 12:00 93 header file [   ] 08405.hea 2012-02-14 18:16 101 header file [   ] 08405.dat 2000-11-04 11:59 26M digitized signal(s) [   ] 08405.atr 2001-12-20 11:40 52 reference annotations [   ] 08378.qrs 1992-07-30 01:19 89K unaudited annotations [   ] 08378.hea- 2000-11-04 11:56 92 header file [   ] 08378.hea 2012-02-14 18:16 100 header file [   ] 08378.dat 2000-11-04 11:55 26M digitized signal(s) [   ] 08378.atr- 2001-12-20 11:40 194 reference annotations [   ] 08378.atr 2006-02-13 15:57 226 reference annotations [   ] 08219.qrs 1992-07-30 01:19 116K unaudited annotations [   ] 08219.hea- 2000-11-04 11:54 99 header file [   ] 08219.hea 2012-02-14 18:16 107 header file [   ] 08219.dat 2000-11-04 11:53 26M digitized signal(s) [   ] 08219.atr 2001-12-20 11:40 1.1K reference annotations [   ] 08215.qrs 1992-07-30 01:19 85K unaudited annotations [   ] 08215.hea- 2000-11-04 11:51 98 header file [   ] 08215.hea 2012-02-14 18:17 108 header file [   ] 08215.dat 2000-11-04 11:51 26M digitized signal(s) [   ] 08215.atr 2001-12-20 11:40 54 reference annotations [   ] 07910.qrs 1992-07-30 01:19 71K unaudited annotations [   ] 07910.hea- 2000-11-04 11:49 95 header file [   ] 07910.hea 2012-02-14 18:17 105 header file [   ] 07910.dat 2000-11-04 11:49 26M digitized signal(s) [   ] 07910.atr 2001-12-20 11:40 138 reference annotations [   ] 07879.qrs 1992-07-30 01:19 111K unaudited annotations [   ] 07879.hea- 2000-11-04 09:04 100 header file [   ] 07879.hea 2012-02-14 18:17 108 header file [   ] 07879.dat 2000-11-04 09:04 26M digitized signal(s) [   ] 07879.atr 2001-12-20 11:40 58 reference annotations [   ] 07859.qrsc 2014-03-04 17:29 121K corrected beat annotations [   ] 07859.qrs- 1992-07-30 01:19 118K unaudited annotations [   ] 07859.qrs 2014-03-04 15:19 118K unaudited annotations [   ] 07859.hea- 2000-11-04 09:02 99 header file [   ] 07859.hea 2012-02-14 18:17 108 header file [   ] 07859.dat 2000-11-04 09:01 26M digitized signal(s) [   ] 07859.atr 2001-12-20 11:40 12 reference annotations [   ] 07162.qrs 1992-07-30 01:19 77K unaudited annotations [   ] 07162.hea- 2000-11-04 09:00 99 header file [   ] 07162.hea 2012-02-14 18:17 107 header file [   ] 07162.dat 2000-11-04 08:59 26M digitized signal(s) [   ] 07162.atr 2001-12-20 11:40 12 reference annotations [   ] 06995.qrs 1992-07-30 01:19 108K unaudited annotations [   ] 06995.hea- 2000-11-02 12:59 96 header file [   ] 06995.hea 2012-02-14 18:17 106 header file [   ] 06995.dat 2000-11-02 12:58 26M digitized signal(s) [   ] 06995.atr 2001-12-20 11:40 156 reference annotations [   ] 06453.qrs 1992-07-30 01:19 68K unaudited annotations [   ] 06453.hea- 2000-11-02 12:54 101 header file [   ] 06453.hea 2012-02-14 18:17 109 header file [   ] 06453.dat 2000-11-02 10:16 24M digitized signal(s) [   ] 06453.atr 2001-12-20 11:40 176 reference annotations [   ] 06426.qrs 1992-07-30 01:19 108K unaudited annotations [   ] 06426.hea- 2000-11-03 12:59 97 header file [   ] 06426.hea 2012-02-14 18:17 106 header file [   ] 06426.dat 2000-11-03 12:57 26M digitized signal(s) [   ] 06426.atr 2001-12-20 11:40 738 reference annotations [   ] 05261.qrs 1992-07-30 01:19 89K unaudited annotations [   ] 05261.hea- 2000-11-03 22:54 102 header file [   ] 05261.hea 2012-02-14 18:17 110 header file [   ] 05261.dat 2000-11-03 22:54 26M digitized signal(s) [   ] 05261.atr 2001-12-20 11:40 304 reference annotations [   ] 05121.qrs 1992-07-30 01:19 97K unaudited annotations [   ] 05121.hea- 2000-11-03 22:49 97 header file [   ] 05121.hea 2012-02-14 18:17 107 header file [   ] 05121.dat 2000-11-03 22:48 26M digitized signal(s) [   ] 05121.atr- 1992-07-30 01:19 312 reference annotations [   ] 05121.atr 2001-12-20 11:40 574 reference annotations [   ] 05091.qrsc 2000-11-02 12:52 72K corrected beat annotations [   ] 05091.qrs 1992-07-30 01:19 72K unaudited annotations [   ] 05091.hea- 2000-11-02 12:53 99 header file [   ] 05091.hea 2012-02-14 18:18 109 header file [   ] 05091.dat 2000-11-02 12:52 26M digitized signal(s) [   ] 05091.atr 2001-12-20 11:40 220 reference annotations [XWS] 04936.xws 1999-12-12 17:08 90 WAVEScript [   ] 04936.qrs 1992-07-30 01:19 105K unaudited annotations [   ] 04936.hea- 1992-07-30 01:19 135 header file [   ] 04936.hea 2012-02-14 18:18 99 header file [   ] 04936.dat 1992-07-30 01:19 26M digitized signal(s) [   ] 04936.atr 2001-12-20 11:40 1.0K reference annotations [   ] 04908.qrs 1992-07-30 01:19 121K unaudited annotations [   ] 04908.hea- 2000-11-02 11:38 97 header file [   ] 04908.hea 2012-02-14 18:18 105 header file [   ] 04908.dat 2000-11-02 11:38 26M digitized signal(s) [   ] 04908.atr 2001-12-20 11:40 234 reference annotations [   ] 04746.qrs 1992-07-30 01:19 94K unaudited annotations [   ] 04746.hea- 2000-11-02 11:18 101 header file [   ] 04746.hea 2012-02-14 18:18 109 header file [   ] 04746.dat 2000-11-02 11:17 26M digitized signal(s) [   ] 04746.atr 2001-12-20 11:40 148 reference annotations [   ] 04126.qrs 1992-07-30 01:19 84K unaudited annotations [   ] 04126.hea- 2000-11-03 22:45 99 header file [   ] 04126.hea 2012-02-14 18:18 107 header file [   ] 04126.dat 2000-11-03 22:45 26M digitized signal(s) [   ] 04126.atr 2001-12-20 11:40 204 reference annotations [   ] 04048.qrs 1992-07-30 01:19 78K unaudited annotations [   ] 04048.hea- 2000-11-03 22:42 101 header file [   ] 04048.hea 2012-02-14 18:18 109 header file [   ] 04048.dat 2000-11-03 22:40 26M digitized signal(s) [   ] 04048.atr 2001-12-20 11:40 204 reference annotations [   ] 04043.qrs 1992-07-30 01:19 121K unaudited annotations [   ] 04043.hea- 2000-11-03 17:36 100 header file [   ] 04043.hea 2012-02-14 18:18 108 header file [   ] 04043.dat 2000-11-03 17:35 26M digitized signal(s) [   ] 04043.atr 2001-12-20 11:40 2.3K reference annotations [   ] 04015.qrs 1992-07-30 01:19 86K unaudited annotations [   ] 04015.hea- 2000-11-03 13:03 101 header file [   ] 04015.hea 2012-02-14 18:18 110 header file [   ] 04015.dat 2000-11-03 13:02 26M digitized signal(s) [   ] 04015.atr 2001-12-20 11:40 198 reference annotations [   ] 03665.qrs 1992-07-30 01:19 103K unaudited annotations [   ] 03665.hea 1992-07-30 01:19 15 header file [   ] 03665.atr 2001-12-20 11:40 204 reference annotations [   ] 00735.qrs 1992-07-30 01:19 79K unaudited annotations [   ] 00735.hea 1992-07-30 01:19 15 header file [   ] 00735.atr 2001-12-20 11:40 36 reference annotations

Questions and Comments

If you would like help understanding the content of this page, or using and downloading data/software, please see our Frequently Asked Questions.

If you have any comments, feedback, or particular questions regarding this page or our website, please send them to the webmaster.

Updated Wednesday, 15 June 2016 at 09:08 EDT

PhysioNet is supported by the National Institute of General Medical Sciences (NIGMS) and the National Institute of Biomedical Imaging and Bioengineering (NIBIB) under NIH grant number 2R01GM104987-09.