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/content/101/23/e215.full]; 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
[DIR] Parent Directory - [   ] 00735.atr 20-Dec-2001 17:40 36 reference annotations [   ] 00735.hea 30-Jul-1992 07:19 15 header file [   ] 00735.qrs 30-Jul-1992 07:19 79K unaudited annotations [   ] 03665.atr 20-Dec-2001 17:40 204 reference annotations [   ] 03665.hea 30-Jul-1992 07:19 15 header file [   ] 03665.qrs 30-Jul-1992 07:19 103K unaudited annotations [   ] 04015.atr 20-Dec-2001 17:40 198 reference annotations [   ] 04015.dat 03-Nov-2000 19:02 26M digitized signal(s) [   ] 04015.hea 15-Feb-2012 00:18 110 header file [   ] 04015.hea- 03-Nov-2000 19:03 101 header file [   ] 04015.qrs 30-Jul-1992 07:19 86K unaudited annotations [   ] 04043.atr 20-Dec-2001 17:40 2.3K reference annotations [   ] 04043.dat 03-Nov-2000 23:35 26M digitized signal(s) [   ] 04043.hea 15-Feb-2012 00:18 108 header file [   ] 04043.hea- 03-Nov-2000 23:36 100 header file [   ] 04043.qrs 30-Jul-1992 07:19 121K unaudited annotations [   ] 04048.atr 20-Dec-2001 17:40 204 reference annotations [   ] 04048.dat 04-Nov-2000 04:40 26M digitized signal(s) [   ] 04048.hea 15-Feb-2012 00:18 109 header file [   ] 04048.hea- 04-Nov-2000 04:42 101 header file [   ] 04048.qrs 30-Jul-1992 07:19 78K unaudited annotations [   ] 04126.atr 20-Dec-2001 17:40 204 reference annotations [   ] 04126.dat 04-Nov-2000 04:45 26M digitized signal(s) [   ] 04126.hea 15-Feb-2012 00:18 107 header file [   ] 04126.hea- 04-Nov-2000 04:45 99 header file [   ] 04126.qrs 30-Jul-1992 07:19 84K unaudited annotations [   ] 04746.atr 20-Dec-2001 17:40 148 reference annotations [   ] 04746.dat 02-Nov-2000 17:17 26M digitized signal(s) [   ] 04746.hea 15-Feb-2012 00:18 109 header file [   ] 04746.hea- 02-Nov-2000 17:18 101 header file [   ] 04746.qrs 30-Jul-1992 07:19 94K unaudited annotations [   ] 04908.atr 20-Dec-2001 17:40 234 reference annotations [   ] 04908.dat 02-Nov-2000 17:38 26M digitized signal(s) [   ] 04908.hea 15-Feb-2012 00:18 105 header file [   ] 04908.hea- 02-Nov-2000 17:38 97 header file [   ] 04908.qrs 30-Jul-1992 07:19 121K unaudited annotations [   ] 04936.atr 20-Dec-2001 17:40 1.0K reference annotations [   ] 04936.dat 30-Jul-1992 07:19 26M digitized signal(s) [   ] 04936.hea 15-Feb-2012 00:18 99 header file [   ] 04936.hea- 30-Jul-1992 07:19 135 header file [   ] 04936.qrs 30-Jul-1992 07:19 105K unaudited annotations [XWS] 04936.xws 12-Dec-1999 23:08 90 WAVEScript [   ] 05091.atr 20-Dec-2001 17:40 220 reference annotations [   ] 05091.dat 02-Nov-2000 18:52 26M digitized signal(s) [   ] 05091.hea 15-Feb-2012 00:18 109 header file [   ] 05091.hea- 02-Nov-2000 18:53 99 header file [   ] 05091.qrs 30-Jul-1992 07:19 72K unaudited annotations [   ] 05091.qrsc 02-Nov-2000 18:52 72K corrected beat annotations [   ] 05121.atr 20-Dec-2001 17:40 574 reference annotations [   ] 05121.atr- 30-Jul-1992 07:19 312 reference annotations [   ] 05121.dat 04-Nov-2000 04:48 26M digitized signal(s) [   ] 05121.hea 15-Feb-2012 00:17 107 header file [   ] 05121.hea- 04-Nov-2000 04:49 97 header file [   ] 05121.qrs 30-Jul-1992 07:19 97K unaudited annotations [   ] 05261.atr 20-Dec-2001 17:40 304 reference annotations [   ] 05261.dat 04-Nov-2000 04:54 26M digitized signal(s) [   ] 05261.hea 15-Feb-2012 00:17 110 header file [   ] 05261.hea- 04-Nov-2000 04:54 102 header file [   ] 05261.qrs 30-Jul-1992 07:19 89K unaudited annotations [   ] 06426.atr 20-Dec-2001 17:40 738 reference annotations [   ] 06426.dat 03-Nov-2000 18:57 26M digitized signal(s) [   ] 06426.hea 15-Feb-2012 00:17 106 header file [   ] 06426.hea- 03-Nov-2000 18:59 97 header file [   ] 06426.qrs 30-Jul-1992 07:19 108K unaudited annotations [   ] 06453.atr 20-Dec-2001 17:40 176 reference annotations [   ] 06453.dat 02-Nov-2000 16:16 24M digitized signal(s) [   ] 06453.hea 15-Feb-2012 00:17 109 header file [   ] 06453.hea- 02-Nov-2000 18:54 101 header file [   ] 06453.qrs 30-Jul-1992 07:19 68K unaudited annotations [   ] 06995.atr 20-Dec-2001 17:40 156 reference annotations [   ] 06995.dat 02-Nov-2000 18:58 26M digitized signal(s) [   ] 06995.hea 15-Feb-2012 00:17 106 header file [   ] 06995.hea- 02-Nov-2000 18:59 96 header file [   ] 06995.qrs 30-Jul-1992 07:19 108K unaudited annotations [   ] 07162.atr 20-Dec-2001 17:40 12 reference annotations [   ] 07162.dat 04-Nov-2000 14:59 26M digitized signal(s) [   ] 07162.hea 15-Feb-2012 00:17 107 header file [   ] 07162.hea- 04-Nov-2000 15:00 99 header file [   ] 07162.qrs 30-Jul-1992 07:19 77K unaudited annotations [   ] 07859.atr 20-Dec-2001 17:40 12 reference annotations [   ] 07859.dat 04-Nov-2000 15:01 26M digitized signal(s) [   ] 07859.hea 15-Feb-2012 00:17 108 header file [   ] 07859.hea- 04-Nov-2000 15:02 99 header file [   ] 07859.qrs 04-Mar-2014 21:19 118K unaudited annotations [   ] 07859.qrs- 30-Jul-1992 07:19 118K unaudited annotations [   ] 07859.qrsc 04-Mar-2014 23:29 121K corrected beat annotations [   ] 07879.atr 20-Dec-2001 17:40 58 reference annotations [   ] 07879.dat 04-Nov-2000 15:04 26M digitized signal(s) [   ] 07879.hea 15-Feb-2012 00:17 108 header file [   ] 07879.hea- 04-Nov-2000 15:04 100 header file [   ] 07879.qrs 30-Jul-1992 07:19 111K unaudited annotations [   ] 07910.atr 20-Dec-2001 17:40 138 reference annotations [   ] 07910.dat 04-Nov-2000 17:49 26M digitized signal(s) [   ] 07910.hea 15-Feb-2012 00:17 105 header file [   ] 07910.hea- 04-Nov-2000 17:49 95 header file [   ] 07910.qrs 30-Jul-1992 07:19 71K unaudited annotations [   ] 08215.atr 20-Dec-2001 17:40 54 reference annotations [   ] 08215.dat 04-Nov-2000 17:51 26M digitized signal(s) [   ] 08215.hea 15-Feb-2012 00:17 108 header file [   ] 08215.hea- 04-Nov-2000 17:51 98 header file [   ] 08215.qrs 30-Jul-1992 07:19 85K unaudited annotations [   ] 08219.atr 20-Dec-2001 17:40 1.1K reference annotations [   ] 08219.dat 04-Nov-2000 17:53 26M digitized signal(s) [   ] 08219.hea 15-Feb-2012 00:16 107 header file [   ] 08219.hea- 04-Nov-2000 17:54 99 header file [   ] 08219.qrs 30-Jul-1992 07:19 116K unaudited annotations [   ] 08378.atr 13-Feb-2006 21:57 226 reference annotations [   ] 08378.atr- 20-Dec-2001 17:40 194 reference annotations [   ] 08378.dat 04-Nov-2000 17:55 26M digitized signal(s) [   ] 08378.hea 15-Feb-2012 00:16 100 header file [   ] 08378.hea- 04-Nov-2000 17:56 92 header file [   ] 08378.qrs 30-Jul-1992 07:19 89K unaudited annotations [   ] 08405.atr 20-Dec-2001 17:40 52 reference annotations [   ] 08405.dat 04-Nov-2000 17:59 26M digitized signal(s) [   ] 08405.hea 15-Feb-2012 00:16 101 header file [   ] 08405.hea- 04-Nov-2000 18:00 93 header file [   ] 08405.qrs 30-Jul-1992 07:19 115K unaudited annotations [   ] 08434.atr 20-Dec-2001 17:40 92 reference annotations [   ] 08434.dat 04-Nov-2000 18:02 26M digitized signal(s) [   ] 08434.hea 15-Feb-2012 00:16 108 header file [   ] 08434.hea- 04-Nov-2000 18:02 100 header file [   ] 08434.qrs 30-Jul-1992 07:19 78K unaudited annotations [   ] 08455.atr 20-Dec-2001 17:40 52 reference annotations [   ] 08455.dat 04-Nov-2000 18:04 26M digitized signal(s) [   ] 08455.hea 15-Feb-2012 00:16 99 header file [   ] 08455.hea- 04-Nov-2000 18:04 91 header file [   ] 08455.qrs 30-Jul-1992 07:19 116K unaudited annotations [   ] ANNOTATORS 04-Nov-2000 20:16 96 list of annotators [   ] DOI 21-Sep-2015 19:00 19 [   ] MD5SUMS 04-Mar-2014 23:36 5.7K [   ] RECORDS 29-Mar-2000 17:00 150 list of record names [   ] SHA1SUMS 04-Mar-2014 23:36 6.7K [   ] SHA256SUMS 04-Mar-2014 23:36 9.8K [TXT] local.css 10-Nov-2015 21:16 3.1K [TXT] notes.txt 04-Nov-2000 20:06 406

Questions and Comments

If you would like help understanding, using, or downloading content, please see our Frequently Asked Questions.

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

Comments and issues can also be raised on PhysioNet's GitHub page.

Updated Friday, 28-Oct-2016 22:58:42 CEST

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.