The MIT-BIH Noise Stress Test Database

DOI for
The MIT-BIH Noise Stress Test Database:

doi:10.13026/C2HS3T

This database is described in

Moody GB, Muldrow WE, Mark RG. A noise stress test for arrhythmia detectors. Computers in Cardiology 1984; 11:381-384.

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).
sample ECG recording

This database includes 12 half-hour ECG recordings and 3 half-hour recordings of noise typical in ambulatory ECG recordings. The noise recordings were made using physically active volunteers and standard ECG recorders, leads, and electrodes; the electrodes were placed on the limbs in positions in which the subjects’ ECGs were not visible. The three noise records were assembled from the recordings by selecting intervals that contained predominantly baseline wander (in record 'bw'), muscle (EMG) artifact (in record 'ma'), and electrode motion artifact (in record 'em'). Electrode motion artifact is generally considered the most troublesome, since it can mimic the appearance of ectopic beats and cannot be removed easily by simple filters, as can noise of other types.

The ECG recordings were created by the script nstdbgen- using two clean recordings (118 and 119) from the MIT-BIH Arrhythmia Database, to which calibrated amounts of noise from record 'em' were added using nst. (The process of making such records is now simpler; the simplified script nstdbgen can be used with current versions of the WFDB software package to recreate these records.) Noise was added beginning after the first 5 minutes of each record, during two-minute segments alternating with two-minute clean segments. The signal-to-noise ratios (SNRs) during the noisy segments of these records are:

RecordSNR (dB)RecordSNR (dB)
118e2424119e2424
118e1818119e1818
118e1212119e1212
118e06 6119e06 6
118e00 0119e00 0
118e_6-6119e_6-6

Since the original ECG recordings are clean, the correct beat annotations are known even when the noise makes the recordings visually unreadable. The reference annotations for these records are simply copies of those for the original clean ECGs.

Icon  Name                    Last modified      Size  Description
[DIR] Parent Directory - [   ] 118e00.atr 02-Aug-1992 00:35 4.5K reference annotations [   ] 118e00.dat 02-Aug-1992 05:05 2.5M digitized signal(s) [   ] 118e00.hea 02-Aug-1992 05:05 173 header file [XWS] 118e00.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 118e06.atr 02-Aug-1992 05:04 4.5K reference annotations [   ] 118e06.dat 02-Aug-1992 05:04 1.9M digitized signal(s) [   ] 118e06.hea 02-Aug-1992 05:04 175 header file [XWS] 118e06.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 118e12.atr 02-Aug-1992 05:04 4.5K reference annotations [   ] 118e12.dat 02-Aug-1992 05:04 1.9M digitized signal(s) [   ] 118e12.hea 02-Aug-1992 05:04 177 header file [XWS] 118e12.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 118e18.atr 02-Aug-1992 05:03 4.5K reference annotations [   ] 118e18.dat 02-Aug-1992 05:03 1.9M digitized signal(s) [   ] 118e18.hea 02-Aug-1992 05:03 175 header file [XWS] 118e18.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 118e24.atr 02-Aug-1992 05:03 4.5K reference annotations [   ] 118e24.dat 02-Aug-1992 05:03 1.9M digitized signal(s) [   ] 118e24.hea 02-Aug-1992 05:03 176 header file [XWS] 118e24.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 118e_6.atr 02-Aug-1992 05:06 4.5K reference annotations [   ] 118e_6.dat 02-Aug-1992 05:06 2.5M digitized signal(s) [   ] 118e_6.hea 02-Aug-1992 05:06 172 header file [XWS] 118e_6.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 119e00.atr 02-Aug-1992 05:09 4.7K reference annotations [   ] 119e00.dat 02-Aug-1992 05:09 2.5M digitized signal(s) [   ] 119e00.hea 02-Aug-1992 05:09 170 header file [XWS] 119e00.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 119e06.atr 02-Aug-1992 05:08 4.7K reference annotations [   ] 119e06.dat 02-Aug-1992 05:08 1.9M digitized signal(s) [   ] 119e06.hea 02-Aug-1992 05:08 175 header file [XWS] 119e06.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 119e12.atr 02-Aug-1992 05:08 4.7K reference annotations [   ] 119e12.dat 02-Aug-1992 05:08 1.9M digitized signal(s) [   ] 119e12.hea 02-Aug-1992 05:08 174 header file [XWS] 119e12.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 119e18.atr 02-Aug-1992 05:07 4.7K reference annotations [   ] 119e18.dat 02-Aug-1992 05:07 1.9M digitized signal(s) [   ] 119e18.hea 02-Aug-1992 05:07 175 header file [XWS] 119e18.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 119e24.atr 02-Aug-1992 05:06 4.7K reference annotations [   ] 119e24.dat 02-Aug-1992 05:06 1.9M digitized signal(s) [   ] 119e24.hea 02-Aug-1992 05:06 175 header file [XWS] 119e24.xws 12-Dec-1999 19:29 91 WAVEScript [   ] 119e_6.atr 02-Aug-1992 05:10 4.7K reference annotations [   ] 119e_6.dat 02-Aug-1992 05:10 2.5M digitized signal(s) [   ] 119e_6.hea 02-Aug-1992 05:10 171 header file [XWS] 119e_6.xws 12-Dec-1999 19:29 91 WAVEScript [   ] ANNOTATORS 13-Oct-2000 23:32 59 list of annotators [   ] DOI 21-Sep-2015 14:00 19 [   ] MD5SUMS 13-Jul-2005 02:17 2.8K [   ] RECORDS 29-Mar-2000 12:12 93 list of record names [   ] SHA1SUMS 13-Jul-2005 02:17 3.3K [   ] SHA256SUMS 18-Sep-2007 13:39 4.9K [   ] bw.dat 02-Aug-1992 04:39 1.9M digitized signal(s) [   ] bw.hea 14-Feb-2012 21:28 93 header file [   ] bw.hea- 02-Aug-1992 04:39 117 header file [XWS] bw.xws 12-Dec-1999 19:29 80 WAVEScript [   ] em.dat 02-Aug-1992 04:39 1.9M digitized signal(s) [   ] em.hea 14-Feb-2012 21:28 92 header file [   ] em.hea- 02-Aug-1992 04:39 116 header file [XWS] em.xws 12-Dec-1999 19:29 80 WAVEScript [TXT] local.css 28-Oct-2015 20:02 3.1K [   ] ma.dat 02-Aug-1992 04:39 1.9M digitized signal(s) [   ] ma.hea 14-Feb-2012 21:28 90 header file [   ] ma.hea- 02-Aug-1992 04:39 114 header file [XWS] ma.xws 12-Dec-1999 19:29 80 WAVEScript [   ] nstdb.doc 02-Aug-1992 05:54 1.9K [TXT] nstdb.txt 02-Aug-1992 05:54 1.9K [   ] nstdbgen 08-Nov-2002 06:01 730 [   ] nstdbgen- 02-Aug-1992 04:39 1.2K [DIR] old/ 14-Jul-2011 11:50 -

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