In addition to everything that was included in previous editions, this third edition includes:
Although this CD-ROM can be used on any computer capable of reading it, you will find it easiest to use on a PC running Linux or on a SPARC-based workstation running Solaris or SunOS. The precompiled software provided here for these three operating systems is significantly more powerful than that available for any others. If you do not have any of these operating systems, I highly recommend that you try Linux, which is a free operating system that runs on any 386 or later PC.
If you prefer printed manuals, you may purchase them from MIT (use our interactive order form), or you may print your own manuals on any PostScript printer from the preformatted versions of the ECG Database Programmer's Guide, the ECG Database Applications Guide, and the WAVE User's Guide included here; to print the MIT-BIH Arrhythmia Database Directory, follow the directions in the UNIX makefile or the MS-DOS batch file included here.
cd /cdrom/software
sh install.unx
where /cdrom is the mount point for this disk. (You will
probably need root (superuser) permissions for this step only.)
wave -r 200 -a atr &
More detailed instructions can be found in Software for Physiologic Databases and in software installation notes for UNIX and Linux.
More detailed instructions can be found in Software for Physiologic Databases and in software installation notes for MS-DOS and MS-Windows.
cd \software
install
and follow the instructions that appear on-screen.
view 200 atr
(see view(1) for details).
More detailed instructions can be found in Software for Physiologic Databases and in software installation notes for MS-DOS and MS-Windows.
The software provided in source form in the software/db directory can be compiled under any version of UNIX and under a variety of other operating systems, including the Macintosh OS.
Instructions can be found in Software for Physiologic Databases, and in software installation notes for UNIX and the Macintosh. If you have an ANSI/ISO C or C++ compiler or a K&R C compiler and an operating system not mentioned here, you should still be able to compile the software, but some customization may be necessary for your environment.
Here are a few ways to begin your exploration of this disk:
Record names:
100 105 111 116 122 200 207 213 220 230
101 106 112 117 123 201 208 214 221 231
102 107 113 118 124 202 209 215 222 232
103 108 114 119 203 210 217 223 233
104 109 115 121 205 212 219 228 234
\----- (the `100 series') ----/ \----- (the `200 series') ----/
This database consists of 48 annotated records, obtained from 47 subjects studied by the Arrhythmia Laboratory of Beth Israel Hospital in Boston between 1975 and 1979. About 60% of the records were obtained from inpatients. The database contains 23 records (the `100 series') chosen at random from a set of over 4000 24-hour Holter tapes, and 25 records (the `200 series') selected from the same set to include a variety of rare but clinically important phenomena that would not be well-represented by a small random sample. Several records in the 200 series were chosen specifically because features of the rhythm, QRS morphology, or signal quality may be expected to present significant difficulty to arrhythmia detectors.
Each record is slightly over 30 minutes in length. Each signal file contains two signals sampled at 360 Hz. The header files include information about the leads used, the patient's age, sex, and medications. (This information is reproduced in the MIT-BIH Arrhythmia Database Directory.) The reference annotation files include beat, rhythm, and signal quality annotations. Each of the roughly 109,000 beats was manually annotated by at least two cardiologists working independently; their annotations were compared, consensus on disagreements was obtained, and the reference annotation files were prepared.
Four records (102, 104, 107, and 217) include paced beats. The original analog tapes do not represent the pacemaker artifacts with sufficient fidelity to permit them to be recognized by pulse amplitude (or slew rate) and duration alone, the method commonly used for real-time processing. The database records reproduce the analog recordings with sufficient fidelity to permit use of pacemaker artifact detectors designed for tape analysis, however.
The MIT-BIH Arrhythmia Database has been used at approximately 300 sites worldwide prior to the publication of this CD-ROM. Since its initial release in 1980, sixteen errors in beat annotations have been discovered and corrected. No such errors have been found since 1987. A single error in a rhythm label (in record 203) was corrected in the second edition of the CD-ROM, in 1992.
References:
Mark, R.G., Schluter, P.S., Moody, G.B., Devlin, P.H., and Chernoff, D.
An annotated ECG database for evaluating arrhythmia detectors.
Frontiers of Engineering in Health Care: Proceedings of the 4th Annual
Conference of the IEEE Engineering in Medicine and Biology Society,
pp. 205-210. New York: IEEE Press (1982).
Moody, G.B., and Mark, R.G.
The MIT-BIH Arrhythmia Database on CD-ROM and software for use with it.
Computers in Cardiology 17:185-188 (1990).
[This paper describes the first edition of this CD-ROM.]
Creighton University Ventricular Tachyarrhythmia
Database (cudb)
Record names:
cu01 cu06 cu11 cu16 cu21 cu26 cu31
cu02 cu07 cu12 cu17 cu22 cu27 cu32
cu03 cu08 cu13 cu18 cu23 cu28 cu33
cu04 cu09 cu14 cu19 cu24 cu29 cu34
cu05 cu10 cu15 cu20 cu25 cu30 cu35
This database was collected by the late Dr. Floyd M. Nolle at the Creighton University Cardiac Center as part of his work on ventricular fibrillation in the surface electrocardiogram. It contains 35 single-channel records, each of which shows the onset of ventricular fibrillation. Record cu01 was obtained from a Holter recording (played back at real time for digitization); the other records were digitized in real time from high-level (1 V/mV nominal) analog signals from patient monitors. All signals were passed through an active second-order Bessel low-pass filter with a cutoff of 70 Hz, and were digitized at 250 Hz with 12-bit resolution over a 10 V range (10 mV nominal relative to the unamplified signals). Each record contains 127,232 samples (slightly less than 8.5 minutes).
In episodes of cardiac failure, fibrillation is almost always preceded by a run of ventricular tachycardia, which eventually gives way to the fibrillation itself. The onset of fibrillation is extremely difficult to pinpoint in many cases. Any clinically useful detector should respond to the runs of tachycardia preceding fibrillation, since medical intervention is needed at the earliest opportunity. Thus any detector responding to the premonitory tachycardia can exhibit a negative ``time to alarm'' compared to the onset of fibrillation as recorded in the reference annotation files. For this reason, the database is defined as a tachyarrhythmia database rather than a fibrillation database.
In these records, the minimum number of non-VF beats prior to the onset of a VF episode is 61. The mean time interval from the beginning of the record to the onset of VF is 5:47 (with a standard deviation of 2:01). Five records (cu12, cu15, cu24, cu25, and cu32) were from paced patients (in some cases, pacing artifacts are not visible, and pacing is apparent only from the regularity of the rhythm). Repeated defibrillation attempts are visible in many records.
High-quality recordings of these rhythms are extremely rare, and of great importance both for development and evaluation of VF detectors and for basic research on the dynamics of VF. We wish to thank Richard W. Bowser of the Creighton University Cardiac Center for preserving these recordings, for making them available for distribution in this format, and for preparing the preceding notes on this database.
The reference annotation files supplied for this database have been included to aid users in locating events of interest. They are in no sense definitive. All beats are labelled normal (although many are ectopic). VF onset annotations mark only the approximate beginnings of VF episodes.
Reference:
Nolle, F.M., Badura, F.K., Catlett, J.M., Bowser, R.W., and Sketch, M.H.
CREI-GARD, a new concept in computerized arrhythmia monitoring systems.
Computers in Cardiology 13:515-518 (1986).
MIT-BIH Noise Stress Test Database
(nstdb)
Record names:
bw 118e24 118e06 119e24 119e06
em 118e18 118e00 119e18 119e00
ma 118e12 118e_6 119e12 119e_6
This database consists of 15 thirty-minute records. Three of these (records `bw', `em', and `ma') contain noise of the types typically observed in ECG recordings. They were obtained using a Holter recorder on an active subject, with leads placed so that the subject's ECG is not visible. Two signals were recorded simultaneously. Record `bw' contains primarily baseline wander, a low-frequency signal usually caused by motion of the subject or the leads. Record `em' contains electrode motion artifact (usually the result of intermittent mechanical forces acting on the electrodes), with significant amounts of baseline wander and muscle noise as well. Record `ma' contains primarily muscle noise (EMG), with a spectrum that overlaps that of the ECG, but extends to higher frequencies. Electrode motion artifact is usually the most troublesome type of noise for arrhythmia detectors since it can closely mimic characteristics of the ECG.
The remaining records reproduce MIT-BIH Arrhythmia Database records 118 and 119 with `em' noise added at various levels. Since the correct beat labels are known for these records, they may be used to test the noise tolerance of an arrhythmia detector. Records 118 and 119 were chosen for this purpose because they are not intrinsically noisy, and because most arrhythmia detectors can analyze them without significant errors. Thus any errors that occur in the analysis of the records to which noise has been added can be attributed to the noise, and not to any inherent difficulty in analyzing the ECG itself. The names of these records are of the form `RRReNN', where `RRR' is the name of the original ECG record and `NN' is the signal-to-noise ratio (in dB) during the noisy periods (`_6' corresponds to -6 dB). For details, see nstdb/nstdb.doc.
The first edition of the MIT-BIH Noise Stress Test Database, which appeared on the first edition of this disk, is reproduced in `nstdb/old'. The second edition, in `nstdb', is intended to replace the first edition. For further information, see nstdb/old/oldnstdb.doc.
For further details on the issue of signal-to-noise ratio in these records, and for information on creating additional records using similar methods, see nst(1).
Reference:
Moody, G.B., Muldrow, W.K., and Mark, R.G.
A noise stress test for arrhythmia detectors.
Computers in Cardiology 11:381-384 (1984).
ST Change Database (stdb)
Record names:
300 305 310 315 320 324
301 306 311 316 321 325
302 307 312 317 322 326
303 308 313 318 323 327
304 309 314 319
This database consists of 28 records ranging in length from 13 to 67 minutes, obtained from 28 subjects. Records 300 to 323 were obtained during exercise stress tests, using an FM instrumentation tape recorder; these records exhibit transient ST depression in response to exercise-induced ischemia. The header files for these records include information about the gain of the signals that can be used to calibrate ST measurements in terms of body surface potentials.
Records 324 to 327 were obtained from Holter tapes, and show ST elevation. Records 313 to 317 and 319 to 323 contain only one signal; the rest contain two signals. All signals were sampled at 360 Hz. The annotation files contain beat and signal quality annotations only (ST change annotations are not present).
Reference:
Albrecht, P.
S-T segment characterization for long-term automated ECG analysis.
MIT M.S. thesis (1983).
Malignant Ventricular Arrhythmia Database
(vfdb)
Record names:
418 423 428 602 611
419 424 429 605 612
420 425 430 607 614
421 426 609 615
422 427 610
This database consists of 22 thirty-five-minute records, obtained from Holter tapes of 16 subjects. It is annotated only with respect to rhythm changes, which include 89 episodes of ventricular tachycardia, 60 episodes of ventricular flutter, and 42 episodes of ventricular fibrillation. The signal files contain two signals, each sampled at 250 Hz.
References: Greenwald, S.D., Albrecht, P., Moody, G.B., and Mark, R.G. Estimating confidence limits for arrhythmia detector performance. Computers in Cardiology 12:383-386 (1985).
Greenwald, S.D.
Development and evaluation of a ventricular fibrillation detector.
MIT M.S. thesis (1986).
Atrial Fibrillation/Flutter Database
(afdb)
Record names:
00735 04048 04908 05121 06453 07859 08215 08405
03665 04126 04936 05261 06995 07879 08219 08434
04015 04746 05091 06426 07162 07910 08378 08455
04043
This database may be useful for development and evaluation of atrial fibrillation/flutter detectors that rely on timing information only. It consists of 25 ten-hour records (obtained from Holter tapes of 25 subjects) containing about 300 episodes of atrial fibrillation and 40 episodes of atrial flutter. Because of space limitations, it is not feasible to include all 250 hours of the ECG signals on this disk. The `afdb' directory contains two sets of annotation files for all 25 records, and a signal file for record 04936. The signal file contains two signals, sampled at 250 Hz. The reference annotation (.atr) files contain only rhythm change annotations. The beat annotation (.qrs) files were produced by an automated QRS detector, and all beats are labelled normal; the R-R interval sequences may be recovered from these files and used as input to the atrial fibrillation/flutter detector to be tested. Note that the .qrs files have not been audited, and contain a small number of errors.
Reference:
Moody, G.B., and Mark, R.G.
A new method for detecting atrial fibrillation using R-R intervals.
Computers in Cardiology 10:227-230 (1983).
ECG Compression Test Database (cdb)
Records:
08730 (7) 12621 (4) 13030 (5) 13229 (4) 13420 (12) 13559 (1)
11442 (4) 12713 (4) 13045 (3) 13274 (5) 13425 (5) 13580 (2)
11950 (5) 12921 (1) 13059 (7) 13301 (4) 13431 (3) 13585 (8)
12247 (4) 12936 (3) 13130 (2) 13317 (5) 13508 (5) 13590 (6)
12431 (5) 12940 (5) 13139 (3) 13370 (2) 13543 (6) 13649 (4)
12490 (2) 12981 (3) 13227 (6) 13380 (5) 13556 (7) 13687 (4)
12531 (5) 13005 (2)
This database consists of 168 unannotated records, each 20.48 seconds in duration, obtained from Holter tapes from 38 subjects. Each subject is identified by one of the five-digit numbers in the table above; the number in parentheses next to each of these subject numbers is the number of records that were obtained from that subject's Holter tape. The record names are of the form `sssss_nn', where `sssss' is the subject number and `nn' is a segment number, beginning at 01; thus the records for subject 12490 are named `12490_01' and `12490_02'. The records exhibit a wide variety of arrhythmias, conduction disturbances, and noise. Many were selected because the characteristics of the signal or noise may be expected to pose a problem for an ECG compression method that is not exactly invertible. By comparing diagnoses made on the basis of compressed versions of these records with independent diagnoses made from the uncompressed versions, the ability of an ECG compression method to preserve clinically important waveform details can be assessed. Each record contains two signals, sampled at 250 Hz.
Reference:
Moody, G.B., Mark, R.G., and Goldberger, A.L.
Evaluation of the ``TRIM'' ECG data compressor.
Computers in Cardiology 15:167-170 (1988).
Supraventricular Arrhythmia Database
(svdb)
Record names:
800 810 827 847 857 867 877 886
801 811 828 848 858 868 878 887
802 812 829 849 859 869 879 888
803 820 840 850 860 870 880 889
804 821 841 851 861 871 881 890
805 822 842 852 862 872 882 891
806 823 843 853 863 873 883 892
807 824 844 854 864 874 884 893
808 825 845 855 865 875 885 894
809 826 846 856 866 876
This database consists of 78 thirty-minute records, obtained from Holter tapes,
to supplement the examples of supraventricular arrhythmias in the MIT-BIH
Arrhythmia Database. They have been annotated using a semi-automated method
that gives highly accurate results, but the annotations have not been audited
to the extent of those in the MIT-BIH Arrhythmia Database, and a small number
of errors may be present. The reference annotation files include beat and
signal quality annotations, but no rhythm annotations. Each record contains
two signals, sampled at 128 Hz.
MIT-BIH Long-Term ECG Database (ltdb)
Record names:
14046 14134 14149 14157 14172 14184 15814
This database contains seven annotated long-term records ranging in length
from 14 to 24 hours. These records are complete Holter tapes from seven
subjects. As for the Supraventricular Arrhythmia Database, the records
have been annotated using a semi-automated method, and a small number of
errors may be present. The reference annotation files include beat and signal
quality annotations, but no rhythm annotations. Six of the records contain two
signals; record 15814 contains three. All signals are sampled at 128 Hz.
MIT-BIH Normal Sinus Rhythm Database
(nsrdb)
Record names:
16265 16273 16483 16773 16795 17453 18184 19090 19140
16272 16420 16539 16786 17052 18177 19088 19093 19830
This database contains 18 records, each between 20 and 24 hours in length,
from subjects without diagnosed cardiac abnormalities. The header files
for these records include the age and gender of each subject, and the starting
time of each record. The records contain only machine-derived beat annotation
files, which have been manually corrected but may contain a small number of
errors. Since space does not permit inclusion of the signal files, this
database is useful primarily for study of normal heart rate variability.
The sampling frequency was 128 Hz.
Other databases (odb)
Record names:
x_edb x_mgh020 x_mgh022 x_slpdb 237 237n
Three other CD-ROM databases of physiologic signals are generally available at present, and a fourth is in preparation. All four have been produced in a format compatible with that of this disk, and the software included on this disk can be used to read records on the other three. The `odb' directory contains abbreviated sample records from each of these databases.
Record `x_edb' is a sample from the European ST-T Database, a large database of ECG recordings selected to include examples of transient myocardial ischemia. This database was produced at the CNR Institute of Clinical Physiology in Pisa between 1985 and 1991, with support from the European Community, the European Society of Cardiology, and research groups from twelve nations. The database contains 90 two-hour, two-channel records, annotated beat-by-beat and with respect to rhythm and signal quality changes as in the MIT-BIH Arrhythmia Database, but with additional annotations to mark episodes of transient ST or T-wave changes. The database includes 367 annotated episodes of ST change, and 401 episodes of T-wave change, with durations ranging from 28 seconds to over an hour, and peak displacements ranging from 100 microvolts to more than one millivolt. The CD-ROM also contains the VALE Database (35 three-hour single-channel records). See odb/edb.txt for further details about these databases.
Records `x_mgh020' and `x_mgh022' are samples from the Massachusetts General Hospital-Marquette Foundation Waveform Database, a comprehensive collection of hemodynamic and ECG waveforms of patients in critical care units. The database consists of 375 hours of recordings from 250 patients, and represents a broad spectrum of physiologic and pathophysiologic states. Typical records include three ECG leads, arterial pressure, pulmonary arterial pressure, central venous pressure, respiratory impedance, and airway CO2 waveforms; some include intra-cranial, left atrial, ventricular, or intra-aortic-balloon pressure waveforms. ECG and pressure calibration and pressure catheter frequency response tests are included for each record. The reference annotation files for these records have the suffix `.ari'. See odb/mghdb.txt for further details about this database.
Record `x_slpdb' is a sample from the MIT-BIH Polysomnographic Database. This
database contains over 80 hours' worth of recordings of multiple physiologic
signals during sleep. Subjects were monitored for evaluation of chronic
obstructive sleep apnea syndrome, and to test the effects of constant positive
airway pressure (CPAP), a standard therapeutic intervention that usually
prevents or substantially reduces airway obstruction in these subjects.
Typical records include ECG (one lead), arterial pressure, EEG (one lead), and
respiration (nasal thermistor); some also include respiratory effort
(inductance plethysmograph), EOG, chin EMG, oxygen saturation (earlobe
oximeter), and cardiac stroke volume signals. Two annotation files are
supplied for each record; for this sample, `odb/x_slpdb.ecg' contains beat
annotations, and `odb/x_slpdb.st' contains sleep stage annotations. See
odb/slpdb.txt for further details
about this database.
MIMIC Database
Records 237 and 237n are taken from the MIMIC (Multi-parameter Intelligent Monitoring for Intensive Care) Database, currently (as of mid-1997) in preparation at MIT. The MIMIC Database is planned to include 100 patient records, each containing about 24 to 48 hours or more of continuous data recorded from medical, surgical, and cardiac intensive care unit monitors at Boston's Beth Israel Hospital.
The MIMIC Database includes both digitized physiologic signals (waveform data) and information in hypertext form derived from the subjects' medical records (clinical data). The hypertext files contain links to the waveform data, and the annotation files associated with the waveform data contain links to the clinical data.
There are two sets of waveform data associated with each MIMIC subject:
As noted above, the MIMIC Database also includes clinical data in HTML form for each record. This information is derived from the subjects' medical records (including symptoms, diagnoses, progress notes, and medications administered) and from the hospital's clinical computing systems (primarily laboratory results). On this disk, the clinical data for the sample record are contained within the *.htm files in the odb directory; file index.htm is an index to these data. The numerous hyperlinks attached to time-stamps in these data allow easy cross-referencing between the clinical data and the recorded waveforms. See the MIMIC Database Software Notes for information about using these links.
See A Database to Support Development
and Evaluation of Intelligent Intensive Care Monitoring and
odb/mimic.txt for additional
information about the MIMIC Database.
The DB Software Package, WAVE,
and WVIEW
Specialized software is needed to make use of databases of digitized ECGs and other physiologic signals and annotations such as these. This CD-ROM contains an extensive set of software developed at MIT over many years for use with such databases. The major components of this software are:
The DB Software Package. This package includes over 30 applications for manipulating, reformatting, excerpting, and analyzing recordings such as those on this disk. It also includes the reference implementation of the algorithms for evaluating arrhythmia and ischemia detectors as specified by the ANSI/AAMI Ambulatory ECG Standard (EC38-1994). All of these applications are written in highly portable C and run under MS-DOS and UNIX, and with minor modifications on the Macintosh and other environments for which K&R or ANSI/ISO C or C++ compilers are available. All are based on the DB library, included as part of the package. The DB library is a comprehensive and extensible set of functions (subroutines) that may be used by C, C++, or Fortran programs for reading and writing signal and annotation files such as those on this disk, among many other supported formats. The DB library may be freely incorporated (with acknowledgment) in your applications (see the copying policy below).
The DB Software Package is provided on this disk in C source form, and in precompiled binary form for MS-DOS and for several versions of UNIX. A 110-page applications guide and a 140-page programmer's guide are also provided (as TeX/troff source documents and in HTML and PostScript forms).
WAVE. This is a powerful X Window System application for viewing annotated or unannotated recordings such as those on this disk, for interactive annotation editing, and for interactive control of external programs for analysis of these recordings. WAVE is provided on this disk in precompiled binary form (only) for several versions of UNIX. A 130-page user's guide is included in LaTeX source and in HTML and PostScript forms.
For further information on this software, follow the links above, and also see the software notes. There are also a few special-purpose programs developed specifically for use with the MIMIC Database; see the MIMIC Database software notes for details about these programs.
The files on this disk are described briefly here:
European ST-T Database sample
This disk is written in ISO 9660 format, the standard format for storage of data on CD-ROMs, with Rock Ridge extensions to support full UNIX file naming conventions on systems that are `Rock Ridge aware'. The exact appearance of file names on this disk may vary, depending on your operating system and the I/O driver it uses for reading CD-ROMs.
Most modern versions of UNIX are `Rock Ridge aware', and on these systems file names will appear as shown above. If your system does not support Rock Ridge extensions, the standard ISO 9660 file names appear instead, in whatever format your system supports for ISO 9660 file names. These names are monocase, limited to 8 characters, a mandatory `.', and a 3-character suffix, as under MS-DOS. Some systems will also display the ISO version number suffix (`;1') appended to each file name; this is a particular nuisance on UNIX systems, since `;' must be quoted to protect it from interpretation by the shell. In such cases, you may wish to make a set of symbolic links to the files on this disk, using unadorned names for the links.
Each directory on this disk contains a text file called `TRANS.TBL' (depending on your system, the name of this file may appear as `trans.tbl', `TRANS.TBL;1', or `trans.tbl;1'). Refer to these files for translations between the Rock Ridge file names and the ISO 9660 file names in each directory.
On systems that display file names in upper case, directory names appear in upper case as well. The problems with an appended `.', and with the ISO version number suffix, do not affect directory names. In this file and in the other documentation on this disk, components of a path name are separated by `/', as is standard for UNIX systems. Thus the directory known to UNIX as software/manuals/dbaguide is SOFTWARE\MANUALS\DBAGUIDE under MS-DOS, or software:manuals:dbaguide on the Macintosh.
Text files within the software/db directory of this disk are in UNIX format, with lines separated by ASCII line-feed characters only. Other text files on this disk are in MS-DOS format, with lines separated by ASCII carriage-return and line-feed character pairs. Most MS-DOS compilers and text editors accept UNIX-format text files, and the reverse is also generally true. If you wish to print a text file, however, you may wish to convert it to native format. The program u2d.exe (provided in the software/msdos directory) converts UNIX text files to MS-DOS format. To use it, copy it to a directory in your PATH, copy the files to be converted into an empty directory, and (from within that directory) type
u2d *.*(Individual files may be converted by naming them on the u2d command line. u2d reformats UNIX text files as MS-DOS format files, but does not modify MS-DOS text files or binary files.) Under UNIX, to convert MS-DOS text files to UNIX format, use a command such as
tr -d '\015' <msdos-file >unix-fileMacintosh text files have lines separated by ASCII carriage-return characters only; see software/MAC.TXT for instructions on converting UNIX text files to Macintosh format.
Please note: Files now available via PhysioNet are no longer subject to the restrictions below, which apply only to the 23 *.dat files in the mitdb directory of the CD-ROM that are unavailable via PhysioNet. Please see the PhysioNet copying policy statement for further information.
Except where noted otherwise in individual files, the entire contents of this disk are Copyright © Massachusetts Institute of Technology 1980-1997. All rights reserved.
Permission is granted to reproduce files from this disk, but not the entire disk, for limited distribution within the original purchaser's organization, provided that the copyright notice and this permission notice are preserved on all copies.
Permission is granted to make and distribute verbatim printed copies of the MIT-BIH Arrhythmia Database Directory, the ECG Database Programmer's Guide, the ECG Database Applications Guide, and the WAVE User's Guide.
Permission is granted to make and distribute compiled (binary) versions of the software in the `software/db' directory of this disk, provided that the following notice is incorporated in all copies:
Copyright © Massachusetts Institute of Technology 1997. Permission is granted to make and distribute verbatim copies of this software provided that the copyright notice and this notice are preserved on all copies.
The DB library (defined as the contents of the `software/db/lib' directory of this disk) may be distributed freely in source or compiled form, provided that the preceding notice is incorporated in all copies. This requirement does not apply to user-written software that incorporates the DB library (see below).
WAVE and WVIEW may be copied freely for use within the purchaser's organization, but may not be distributed elsewhere without express written permission of the author (address below), obtained in advance in each instance.
Permission is granted to make and distribute compiled (binary) versions of modified versions of the software in the `software/db' directory of this disk, provided that the following notice is incorporated in all copies:
This software is derived from components of the DB Software Package. The DB Software Package is Copyright © Massachusetts Institute of Technology 1997; used by permission.
Modified versions of the DB library may be distributed freely in source or compiled form, provided that the preceding notice is incorporated in all copies. The author would appreciate receiving any modifications, particularly if you add support for other file formats.
Permission is granted to make and distribute user-written software that incorporates the DB library in whole or in part, provided that the following notice is incorporated in all copies:
Portions of this software are Copyright © Massachusetts Institute of Technology 1997, and are incorporated by permission.
If you have questions about this disk, please write to:
George B. Moodye-mail: george@mit.edu
Reports from users have contributed to the accuracy of the reference annotations and the quality of the software and the documentation on this disk. Your comments and suggestions are welcome. Please send them to the address above.
25 May 1997 (Links and addresses revised 9 June 2003 for PhysioNet)
Copyright © Massachusetts Institute of Technology 1997. All rights reserved.