The MIT-BIH Atrial Fibrillation Database

This database includes 25 long-term ECG recordings of human subjects with atrial fibrillation (mostly paroxysmal). Currently, 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 recently, 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.

Reference

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

 Name                    Last modified      Size  Description
 Parent Directory                             -   
 00735.atr               20-Dec-2001 11:40   36   reference annotations
 00735.hea               05-Apr-2008 18:05    0   header file
 00735.hea-              30-Jul-1992 01:19   15   header file
 00735.qrs               30-Jul-1992 01:19   79K  unaudited annotations
 03665.atr               20-Dec-2001 11:40  204   reference annotations
 03665.hea               05-Apr-2008 18:05    0   header file
 03665.hea-              30-Jul-1992 01:19   15   header file
 03665.qrs               30-Jul-1992 01:19  103K  unaudited annotations
 04015.atr               20-Dec-2001 11:40  198   reference annotations
 04015.dat               03-Nov-2000 13:02   26M  digitized signal(s)
 04015.hea               05-Apr-2008 18:05  108   header file
 04015.hea-              03-Nov-2000 13:03  101   header file
 04015.qrs               30-Jul-1992 01:19   86K  unaudited annotations
 04043.atr               20-Dec-2001 11:40  2.3K  reference annotations
 04043.dat               03-Nov-2000 17:35   26M  digitized signal(s)
 04043.hea               05-Apr-2008 18:05  106   header file
 04043.hea-              03-Nov-2000 17:36  100   header file
 04043.qrs               30-Jul-1992 01:19  121K  unaudited annotations
 04048.atr               20-Dec-2001 11:40  204   reference annotations
 04048.dat               03-Nov-2000 22:40   26M  digitized signal(s)
 04048.hea               05-Apr-2008 18:05  107   header file
 04048.hea-              03-Nov-2000 22:42  101   header file
 04048.qrs               30-Jul-1992 01:19   78K  unaudited annotations
 04126.atr               20-Dec-2001 11:40  204   reference annotations
 04126.dat               03-Nov-2000 22:45   26M  digitized signal(s)
 04126.hea               05-Apr-2008 18:05  105   header file
 04126.hea-              03-Nov-2000 22:45   99   header file
 04126.qrs               30-Jul-1992 01:19   84K  unaudited annotations
 04746.atr               20-Dec-2001 11:40  148   reference annotations
 04746.dat               02-Nov-2000 11:17   26M  digitized signal(s)
 04746.hea               05-Apr-2008 18:05  107   header file
 04746.hea-              02-Nov-2000 11:18  101   header file
 04746.qrs               30-Jul-1992 01:19   94K  unaudited annotations
 04908.atr               20-Dec-2001 11:40  234   reference annotations
 04908.dat               02-Nov-2000 11:38   26M  digitized signal(s)
 04908.hea               05-Apr-2008 18:05  103   header file
 04908.hea-              02-Nov-2000 11:38   97   header file
 04908.qrs               30-Jul-1992 01:19  121K  unaudited annotations
 04936.atr               20-Dec-2001 11:40  1.0K  reference annotations
 04936.dat               30-Jul-1992 01:19   26M  digitized signal(s)
 04936.hea               05-Apr-2008 18:05   97   header file
 04936.hea-              30-Jul-1992 01:19  135   header file
 04936.qrs               30-Jul-1992 01:19  105K  unaudited annotations
 04936.xws               12-Dec-1999 17:08   90   WAVEScript
 05091.atr               20-Dec-2001 11:40  220   reference annotations
 05091.dat               02-Nov-2000 12:52   26M  digitized signal(s)
 05091.hea               05-Apr-2008 18:05  107   header file
 05091.hea-              02-Nov-2000 12:53   99   header file
 05091.qrs               30-Jul-1992 01:19   72K  unaudited annotations
 05091.qrsc              02-Nov-2000 12:52   72K  corrected beat annotat>
 05121.atr               20-Dec-2001 11:40  574   reference annotations
 05121.atr-              30-Jul-1992 01:19  312   reference annotations
 05121.dat               03-Nov-2000 22:48   26M  digitized signal(s)
 05121.hea               05-Apr-2008 18:05  105   header file
 05121.hea-              03-Nov-2000 22:49   97   header file
 05121.qrs               30-Jul-1992 01:19   97K  unaudited annotations
 05261.atr               20-Dec-2001 11:40  304   reference annotations
 05261.dat               03-Nov-2000 22:54   26M  digitized signal(s)
 05261.hea               05-Apr-2008 18:05  108   header file
 05261.hea-              03-Nov-2000 22:54  102   header file
 05261.qrs               30-Jul-1992 01:19   89K  unaudited annotations
 06426.atr               20-Dec-2001 11:40  738   reference annotations
 06426.dat               03-Nov-2000 12:57   26M  digitized signal(s)
 06426.hea               05-Apr-2008 18:05  104   header file
 06426.hea-              03-Nov-2000 12:59   97   header file
 06426.qrs               30-Jul-1992 01:19  108K  unaudited annotations
 06453.atr               20-Dec-2001 11:40  176   reference annotations
 06453.dat               02-Nov-2000 10:16   24M  digitized signal(s)
 06453.hea               05-Apr-2008 18:05  107   header file
 06453.hea-              02-Nov-2000 12:54  101   header file
 06453.qrs               30-Jul-1992 01:19   68K  unaudited annotations
 06995.atr               20-Dec-2001 11:40  156   reference annotations
 06995.dat               02-Nov-2000 12:58   26M  digitized signal(s)
 06995.hea               05-Apr-2008 18:05  104   header file
 06995.hea-              02-Nov-2000 12:59   96   header file
 06995.qrs               30-Jul-1992 01:19  108K  unaudited annotations
 07162.atr               20-Dec-2001 11:40   12   reference annotations
 07162.dat               04-Nov-2000 08:59   26M  digitized signal(s)
 07162.hea               05-Apr-2008 18:05  105   header file
 07162.hea-              04-Nov-2000 09:00   99   header file
 07162.qrs               30-Jul-1992 01:19   77K  unaudited annotations
 07859.atr               20-Dec-2001 11:40   12   reference annotations
 07859.dat               04-Nov-2000 09:01   26M  digitized signal(s)
 07859.hea               05-Apr-2008 18:05  106   header file
 07859.hea-              04-Nov-2000 09:02   99   header file
 07859.qrs               30-Jul-1992 01:19  118K  unaudited annotations
 07879.atr               20-Dec-2001 11:40   58   reference annotations
 07879.dat               04-Nov-2000 09:04   26M  digitized signal(s)
 07879.hea               05-Apr-2008 18:05  106   header file
 07879.hea-              04-Nov-2000 09:04  100   header file
 07879.qrs               30-Jul-1992 01:19  111K  unaudited annotations
 07910.atr               20-Dec-2001 11:40  138   reference annotations
 07910.dat               04-Nov-2000 11:49   26M  digitized signal(s)
 07910.hea               05-Apr-2008 18:05  103   header file
 07910.hea-              04-Nov-2000 11:49   95   header file
 07910.qrs               30-Jul-1992 01:19   71K  unaudited annotations
 08215.atr               20-Dec-2001 11:40   54   reference annotations
 08215.dat               04-Nov-2000 11:51   26M  digitized signal(s)
 08215.hea               05-Apr-2008 18:05  106   header file
 08215.hea-              04-Nov-2000 11:51   98   header file
 08215.qrs               30-Jul-1992 01:19   85K  unaudited annotations
 08219.atr               20-Dec-2001 11:40  1.1K  reference annotations
 08219.dat               04-Nov-2000 11:53   26M  digitized signal(s)
 08219.hea               05-Apr-2008 18:05  105   header file
 08219.hea-              04-Nov-2000 11:54   99   header file
 08219.qrs               30-Jul-1992 01:19  116K  unaudited annotations
 08378.atr               13-Feb-2006 15:57  226   reference annotations
 08378.atr-              20-Dec-2001 11:40  194   reference annotations
 08378.dat               04-Nov-2000 11:55   26M  digitized signal(s)
 08378.hea               05-Apr-2008 18:05   98   header file
 08378.hea-              04-Nov-2000 11:56   92   header file
 08378.qrs               30-Jul-1992 01:19   89K  unaudited annotations
 08405.atr               20-Dec-2001 11:40   52   reference annotations
 08405.dat               04-Nov-2000 11:59   26M  digitized signal(s)
 08405.hea               05-Apr-2008 18:05   99   header file
 08405.hea-              04-Nov-2000 12:00   93   header file
 08405.qrs               30-Jul-1992 01:19  115K  unaudited annotations
 08434.atr               20-Dec-2001 11:40   92   reference annotations
 08434.dat               04-Nov-2000 12:02   26M  digitized signal(s)
 08434.hea               05-Apr-2008 18:05  106   header file
 08434.hea-              04-Nov-2000 12:02  100   header file
 08434.qrs               30-Jul-1992 01:19   78K  unaudited annotations
 08455.atr               20-Dec-2001 11:40   52   reference annotations
 08455.dat               04-Nov-2000 12:04   26M  digitized signal(s)
 08455.hea               05-Apr-2008 18:05   97   header file
 08455.hea-              04-Nov-2000 12:04   91   header file
 08455.qrs               30-Jul-1992 01:19  116K  unaudited annotations
 ANNOTATORS              04-Nov-2000 14:16   96   list of annotators
 MD5SUMS                 12-Jul-2005 20:09  4.3K  
 RECORDS                 29-Mar-2000 10:00  150   list of record names
 SHA1SUMS                12-Jul-2005 20:15  5.1K  
 SHA256SUMS              18-Sep-2007 12:36  8.0K  
 notes.txt               04-Nov-2000 14:06  406   
 old/                    20-Dec-2001 11:41    -   

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