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.

 Name                    Last modified      Size  Description
 Parent Directory                             -   
 00735.atr               20-Dec-2001 18:40   36   reference annotations
 00735.hea               30-Jul-1992 08:19   15   header file
 00735.qrs               30-Jul-1992 08:19   79K  unaudited annotations
 03665.atr               20-Dec-2001 18:40  204   reference annotations
 03665.hea               30-Jul-1992 08:19   15   header file
 03665.qrs               30-Jul-1992 08:19  103K  unaudited annotations
 04015.atr               20-Dec-2001 18:40  198   reference annotations
 04015.dat               03-Nov-2000 20:02   26M  digitized signal(s)
 04015.hea               15-Feb-2012 01:18  110   header file
 04015.hea-              03-Nov-2000 20:03  101   header file
 04015.qrs               30-Jul-1992 08:19   86K  unaudited annotations
 04043.atr               20-Dec-2001 18:40  2.3K  reference annotations
 04043.dat               04-Nov-2000 00:35   26M  digitized signal(s)
 04043.hea               15-Feb-2012 01:18  108   header file
 04043.hea-              04-Nov-2000 00:36  100   header file
 04043.qrs               30-Jul-1992 08:19  121K  unaudited annotations
 04048.atr               20-Dec-2001 18:40  204   reference annotations
 04048.dat               04-Nov-2000 05:40   26M  digitized signal(s)
 04048.hea               15-Feb-2012 01:18  109   header file
 04048.hea-              04-Nov-2000 05:42  101   header file
 04048.qrs               30-Jul-1992 08:19   78K  unaudited annotations
 04126.atr               20-Dec-2001 18:40  204   reference annotations
 04126.dat               04-Nov-2000 05:45   26M  digitized signal(s)
 04126.hea               15-Feb-2012 01:18  107   header file
 04126.hea-              04-Nov-2000 05:45   99   header file
 04126.qrs               30-Jul-1992 08:19   84K  unaudited annotations
 04746.atr               20-Dec-2001 18:40  148   reference annotations
 04746.dat               02-Nov-2000 18:17   26M  digitized signal(s)
 04746.hea               15-Feb-2012 01:18  109   header file
 04746.hea-              02-Nov-2000 18:18  101   header file
 04746.qrs               30-Jul-1992 08:19   94K  unaudited annotations
 04908.atr               20-Dec-2001 18:40  234   reference annotations
 04908.dat               02-Nov-2000 18:38   26M  digitized signal(s)
 04908.hea               15-Feb-2012 01:18  105   header file
 04908.hea-              02-Nov-2000 18:38   97   header file
 04908.qrs               30-Jul-1992 08:19  121K  unaudited annotations
 04936.atr               20-Dec-2001 18:40  1.0K  reference annotations
 04936.dat               30-Jul-1992 08:19   26M  digitized signal(s)
 04936.hea               15-Feb-2012 01:18   99   header file
 04936.hea-              30-Jul-1992 08:19  135   header file
 04936.qrs               30-Jul-1992 08:19  105K  unaudited annotations
 04936.xws               13-Dec-1999 00:08   90   WAVEScript
 05091.atr               20-Dec-2001 18:40  220   reference annotations
 05091.dat               02-Nov-2000 19:52   26M  digitized signal(s)
 05091.hea               15-Feb-2012 01:18  109   header file
 05091.hea-              02-Nov-2000 19:53   99   header file
 05091.qrs               30-Jul-1992 08:19   72K  unaudited annotations
 05091.qrsc              02-Nov-2000 19:52   72K  corrected beat annotations
 05121.atr               20-Dec-2001 18:40  574   reference annotations
 05121.atr-              30-Jul-1992 08:19  312   reference annotations
 05121.dat               04-Nov-2000 05:48   26M  digitized signal(s)
 05121.hea               15-Feb-2012 01:17  107   header file
 05121.hea-              04-Nov-2000 05:49   97   header file
 05121.qrs               30-Jul-1992 08:19   97K  unaudited annotations
 05261.atr               20-Dec-2001 18:40  304   reference annotations
 05261.dat               04-Nov-2000 05:54   26M  digitized signal(s)
 05261.hea               15-Feb-2012 01:17  110   header file
 05261.hea-              04-Nov-2000 05:54  102   header file
 05261.qrs               30-Jul-1992 08:19   89K  unaudited annotations
 06426.atr               20-Dec-2001 18:40  738   reference annotations
 06426.dat               03-Nov-2000 19:57   26M  digitized signal(s)
 06426.hea               15-Feb-2012 01:17  106   header file
 06426.hea-              03-Nov-2000 19:59   97   header file
 06426.qrs               30-Jul-1992 08:19  108K  unaudited annotations
 06453.atr               20-Dec-2001 18:40  176   reference annotations
 06453.dat               02-Nov-2000 17:16   24M  digitized signal(s)
 06453.hea               15-Feb-2012 01:17  109   header file
 06453.hea-              02-Nov-2000 19:54  101   header file
 06453.qrs               30-Jul-1992 08:19   68K  unaudited annotations
 06995.atr               20-Dec-2001 18:40  156   reference annotations
 06995.dat               02-Nov-2000 19:58   26M  digitized signal(s)
 06995.hea               15-Feb-2012 01:17  106   header file
 06995.hea-              02-Nov-2000 19:59   96   header file
 06995.qrs               30-Jul-1992 08:19  108K  unaudited annotations
 07162.atr               20-Dec-2001 18:40   12   reference annotations
 07162.dat               04-Nov-2000 15:59   26M  digitized signal(s)
 07162.hea               15-Feb-2012 01:17  107   header file
 07162.hea-              04-Nov-2000 16:00   99   header file
 07162.qrs               30-Jul-1992 08:19   77K  unaudited annotations
 07859.atr               20-Dec-2001 18:40   12   reference annotations
 07859.dat               04-Nov-2000 16:01   26M  digitized signal(s)
 07859.hea               15-Feb-2012 01:17  108   header file
 07859.hea-              04-Nov-2000 16:02   99   header file
 07859.qrs               30-Jul-1992 08:19  118K  unaudited annotations
 07879.atr               20-Dec-2001 18:40   58   reference annotations
 07879.dat               04-Nov-2000 16:04   26M  digitized signal(s)
 07879.hea               15-Feb-2012 01:17  108   header file
 07879.hea-              04-Nov-2000 16:04  100   header file
 07879.qrs               30-Jul-1992 08:19  111K  unaudited annotations
 07910.atr               20-Dec-2001 18:40  138   reference annotations
 07910.dat               04-Nov-2000 18:49   26M  digitized signal(s)
 07910.hea               15-Feb-2012 01:17  105   header file
 07910.hea-              04-Nov-2000 18:49   95   header file
 07910.qrs               30-Jul-1992 08:19   71K  unaudited annotations
 08215.atr               20-Dec-2001 18:40   54   reference annotations
 08215.dat               04-Nov-2000 18:51   26M  digitized signal(s)
 08215.hea               15-Feb-2012 01:17  108   header file
 08215.hea-              04-Nov-2000 18:51   98   header file
 08215.qrs               30-Jul-1992 08:19   85K  unaudited annotations
 08219.atr               20-Dec-2001 18:40  1.1K  reference annotations
 08219.dat               04-Nov-2000 18:53   26M  digitized signal(s)
 08219.hea               15-Feb-2012 01:16  107   header file
 08219.hea-              04-Nov-2000 18:54   99   header file
 08219.qrs               30-Jul-1992 08:19  116K  unaudited annotations
 08378.atr               13-Feb-2006 22:57  226   reference annotations
 08378.atr-              20-Dec-2001 18:40  194   reference annotations
 08378.dat               04-Nov-2000 18:55   26M  digitized signal(s)
 08378.hea               15-Feb-2012 01:16  100   header file
 08378.hea-              04-Nov-2000 18:56   92   header file
 08378.qrs               30-Jul-1992 08:19   89K  unaudited annotations
 08405.atr               20-Dec-2001 18:40   52   reference annotations
 08405.dat               04-Nov-2000 18:59   26M  digitized signal(s)
 08405.hea               15-Feb-2012 01:16  101   header file
 08405.hea-              04-Nov-2000 19:00   93   header file
 08405.qrs               30-Jul-1992 08:19  115K  unaudited annotations
 08434.atr               20-Dec-2001 18:40   92   reference annotations
 08434.dat               04-Nov-2000 19:02   26M  digitized signal(s)
 08434.hea               15-Feb-2012 01:16  108   header file
 08434.hea-              04-Nov-2000 19:02  100   header file
 08434.qrs               30-Jul-1992 08:19   78K  unaudited annotations
 08455.atr               20-Dec-2001 18:40   52   reference annotations
 08455.dat               04-Nov-2000 19:04   26M  digitized signal(s)
 08455.hea               15-Feb-2012 01:16   99   header file
 08455.hea-              04-Nov-2000 19:04   91   header file
 08455.qrs               30-Jul-1992 08:19  116K  unaudited annotations
 ANNOTATORS              04-Nov-2000 21:16   96   list of annotators
 MD5SUMS                 13-Jul-2005 03:09  4.3K  
 RECORDS                 29-Mar-2000 18:00  150   list of record names
 SHA1SUMS                13-Jul-2005 03:15  5.1K  
 SHA256SUMS              18-Sep-2007 19:36  8.0K  
 notes.txt               04-Nov-2000 21:06  406   
 old/                    20-Dec-2001 18:41    -