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.
Name Last modified Size Description
![[DIR]](/icons/back.gif)
Parent Directory -
![[ ]](/icons/binary.gif)
00735.atr 20-Dec-2001 17:40 36 reference annotations
![[ ]](/icons/text.gif)
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
![[ ]](/icons/unknown.gif)
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]](/icons/xws.png)
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
![[ ]](/icons/index.gif)
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
local.css 10-Nov-2015 21:16 3.1K
notes.txt 04-Nov-2000 20:06 406
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Friday, 28-Oct-2016 22:58:42 CEST
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