from PhysioNet, the research resource for complex physiologic signals


The MGH/MF Waveform Database

This database is described in

Welch JP, Ford PJ, Teplick RS, Rubsamen RM. The Massachusetts General Hospital-Marquette Foundation Hemodynamic and Electrocardiographic Database -- Comprehensive collection of critical care waveforms. J Clinical Monitoring 7(1):96-97 (1991).

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).

The Massachusetts General Hospital/Marquette Foundation (MGH/MF) Waveform Database is a comprehensive collection of electronic recordings of hemodynamic and electrocardiographic waveforms of stable and unstable patients in critical care units, operating rooms, and cardiac catheterization laboratories. It is the result of a collaboration between physicians, biomedical engineers and nurses at the Massachusetts General Hospital. The database consists of recordings from 250 patients and represents a broad spectrum of physiologic and pathophysiologic states. Individual recordings vary in length from 12 to 86 minutes, and in most cases are about an hour long.

A Patient Guide provides additional information for each recording, including (as available) age, sex, diagnoses, pertinent medical history, ECG interpretation, ventilation, a timeline of events that occurred during the recording, and additional clinical observations.

The typical recording includes three ECG leads, arterial pressure, pulmonary arterial pressure, central venous pressure, respiratory impedance, and airway CO2 waveforms. Some recordings include intra-cranial, left atrial, ventricular and/or intra-aortic-balloon pressure waveforms. ECG calibration, pressure zero, pressure calibration, and pressure/catheter frequency response tests are also recorded. Relevant clinical data and events are documented for each file.

The original signals were recorded on 8-channel instrumentation tape and then digitized at twice real time using sample(1). The raw sampling rate of 1440 samples per second per signal was reduced by a factor of two to yield an effective rate of 360 samples per second per signal relative to real time. This approach permitted the use of low-order analog antialiasing in combination with high-order digital FIR antialiasing to minimize phase distortion in the digitized signals (see sample8.hea for the FIR coefficients).

Each record includes an annotation (.ari) file, which contains beat and event labels. The annotation files have been made available in their present form to aid users of the database in locating interesting features of the recordings. The current annotation files, although they have been prepared with care and substantial effort, are likely to contain a small number of errors.

The MGH/MF Waveform Database was originally distributed in unannotated form on instrumentation tape, and later in annotated digital form on a set of 10 CD-ROMs. The CD-ROMs included the software and documentation in the cape directory, relating to CAPE (Computer Aided Patient Emulator), a system designed by the creators of the database to permit real-time analog playback of the signals from a PC. A software-only demonstration version of CAPE is included; the full version of CAPE, including an ISA-bus PC card and additional software, may be available from Cardionics, Inc..

The original CD-ROMs contained three additional directories that are not included here. The bin and lib directories of the CD-ROMs contained early versions of several of the WFDB applications and of the WFDB library, precompiled for MS-DOS. Current versions of this software (provided here) run on a wide variety of modern operating systems and have been improved in numerous ways, and are also provided in source form for study, customization, or further development. The mitdb directory of the CD-ROMs contained a brief excerpt of record 100 from the MIT-BIH Arrhythmia Database; this excerpt is now available as record 100s in the data directory of the WFDB Software Package.

Acknowledgements

We thank Jeffrey Cooper and Penny Ford-Carleton of the Massachusetts General Hospital for arranging for these recordings to be made available via PhysioNet.

Icon  Name                    Last modified      Size  Description
[DIR] Parent Directory - [   ] ANNOTATORS 24-Jul-2002 14:13 31 list of annotators [   ] MD5SUMS 20-Mar-2012 13:37 34K [   ] RECORDS 24-Jul-2002 14:12 1.7K list of record names [   ] SHA1SUMS 20-Mar-2012 13:38 39K [   ] SHA256SUMS 20-Mar-2012 13:39 57K [DIR] cape/ 02-Dec-1992 11:10 - Computer Aided Patient Emulator [   ] mgh001.ari 31-Dec-1969 19:00 13K beat and event annotations [   ] mgh001.dat 31-Dec-1969 19:00 16M digitized signal(s) [   ] mgh001.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh002.ari 31-Dec-1969 19:00 37K beat and event annotations [   ] mgh002.dat 31-Dec-1969 19:00 21M digitized signal(s) [   ] mgh002.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh003.ari 31-Dec-1969 19:00 28K beat and event annotations [   ] mgh003.dat 31-Dec-1969 19:00 13M digitized signal(s) [   ] mgh003.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh004.ari 31-Dec-1969 19:00 15K beat and event annotations [   ] mgh004.dat 31-Dec-1969 19:00 12M digitized signal(s) [   ] mgh004.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh005.ari 31-Dec-1969 19:00 31K beat and event annotations [   ] mgh005.dat 31-Dec-1969 19:00 20M digitized signal(s) [   ] mgh005.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh006.ari 31-Dec-1969 19:00 16K beat and event annotations [   ] mgh006.dat 31-Dec-1969 19:00 19M digitized signal(s) [   ] mgh006.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh006.hea- 31-Dec-1969 19:00 454 header file [   ] mgh007.ari 31-Dec-1969 19:00 22K beat and event annotations [   ] mgh007.dat 31-Dec-1969 19:00 15M digitized signal(s) [   ] mgh007.hea 23-Jan-2012 15:39 929 header file [   ] mgh008.ari 31-Dec-1969 19:00 22K beat and event annotations [   ] mgh008.dat 31-Dec-1969 19:00 15M digitized signal(s) [   ] mgh008.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh009.ari 31-Dec-1969 19:00 37K beat and event annotations [   ] mgh009.dat 31-Dec-1969 19:00 21M digitized signal(s) [   ] mgh009.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh010.ari 31-Dec-1969 19:00 48K beat and event annotations [   ] mgh010.dat 31-Dec-1969 19:00 21M digitized signal(s) [   ] mgh010.hea 23-Jan-2012 15:39 1.6K header file [   ] mgh011.ari 31-Dec-1969 19:00 33K beat and event annotations [   ] mgh011.dat 31-Dec-1969 19:00 22M digitized signal(s) [   ] mgh011.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh012.ari 31-Dec-1969 19:00 64K beat and event annotations [   ] mgh012.dat 31-Dec-1969 19:00 14M digitized signal(s) [   ] mgh012.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh013.ari 31-Dec-1969 19:00 15K beat and event annotations [   ] mgh013.dat 31-Dec-1969 19:00 21M digitized signal(s) [   ] mgh013.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh014.ari 31-Dec-1969 19:00 16K beat and event annotations [   ] mgh014.dat 31-Dec-1969 19:00 20M digitized signal(s) [   ] mgh014.hea 23-Jan-2012 15:39 1.6K header file [   ] mgh015.ari 31-Dec-1969 19:00 53K beat and event annotations [   ] mgh015.dat 31-Dec-1969 19:00 20M digitized signal(s) [   ] mgh015.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh016.ari 31-Dec-1969 19:00 16K beat and event annotations [   ] mgh016.dat 31-Dec-1969 19:00 17M digitized signal(s) [   ] mgh016.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh017.ari 31-Dec-1969 19:00 26K beat and event annotations [   ] mgh017.dat 31-Dec-1969 19:00 21M digitized signal(s) [   ] mgh017.hea 23-Jan-2012 15:39 1.9K header file [   ] mgh018.ari 31-Dec-1969 19:00 31K beat and event annotations [   ] mgh018.dat 31-Dec-1969 19:00 17M digitized signal(s) [TXT] mgh018.hea 23-Jan-2012 15:39 2.0K header file [   ] mgh019.ari 31-Dec-1969 19:00 25K beat and event annotations [   ] mgh019.dat 31-Dec-1969 19:00 17M digitized signal(s) [   ] mgh019.hea 23-Jan-2012 15:39 1.0K header file [   ] mgh020.ari 31-Dec-1969 19:00 89K beat and event annotations [   ] mgh020.dat 31-Dec-1969 19:00 19M digitized signal(s) [   ] mgh020.hea 23-Jan-2012 15:39 1.7K header file [   ] mgh021.ari 31-Dec-1969 19:00 23K beat and event annotations [   ] mgh021.dat 31-Dec-1969 19:00 13M digitized signal(s) [   ] mgh021.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh022.ari 31-Dec-1969 19:00 34K beat and event annotations [   ] mgh022.dat 31-Dec-1969 19:00 20M digitized signal(s) [   ] mgh022.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh023.ari 31-Dec-1969 19:00 35K beat and event annotations [   ] mgh023.dat 31-Dec-1969 19:00 20M digitized signal(s) [   ] mgh023.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh024.ari 31-Dec-1969 19:00 28K beat and event annotations [   ] mgh024.dat 31-Dec-1969 19:00 19M digitized signal(s) [   ] mgh024.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh025.ari 31-Dec-1969 19:00 37K beat and event annotations [   ] mgh025.dat 31-Dec-1969 19:00 18M digitized signal(s) [   ] mgh025.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh026.ari 02-Dec-1992 11:10 33K beat and event annotations [   ] mgh026.dat 02-Dec-1992 11:10 20M digitized signal(s) [   ] mgh026.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh027.ari 02-Dec-1992 11:10 21K beat and event annotations [   ] mgh027.dat 02-Dec-1992 11:10 16M digitized signal(s) [   ] mgh027.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh028.ari 02-Dec-1992 11:10 10K beat and event annotations [   ] mgh028.dat 02-Dec-1992 11:10 18M digitized signal(s) [   ] mgh028.hea 23-Jan-2012 15:39 2.0K header file [   ] mgh029.ari 02-Dec-1992 11:10 34K beat and event annotations [   ] mgh029.dat 02-Dec-1992 11:10 20M digitized signal(s) [   ] mgh029.hea 23-Jan-2012 15:39 1.8K header file [   ] mgh030.ari 02-Dec-1992 11:10 27K beat and event annotations [   ] mgh030.dat 02-Dec-1992 11:10 21M digitized signal(s) [   ] mgh030.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh031.ari 02-Dec-1992 11:10 32K beat and event annotations [   ] mgh031.dat 02-Dec-1992 11:10 19M digitized signal(s) [   ] mgh031.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh032.ari 02-Dec-1992 11:10 28K beat and event annotations [   ] mgh032.dat 02-Dec-1992 11:10 19M digitized signal(s) [   ] mgh032.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh033.ari 02-Dec-1992 11:10 33K beat and event annotations [   ] mgh033.dat 02-Dec-1992 11:10 21M digitized signal(s) [   ] mgh033.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh034.ari 02-Dec-1992 11:10 20K beat and event annotations [   ] mgh034.dat 02-Dec-1992 11:10 20M digitized signal(s) [   ] mgh034.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh035.ari 02-Dec-1992 11:10 15K beat and event annotations [   ] mgh035.dat 02-Dec-1992 11:10 21M digitized signal(s) [   ] mgh035.hea 23-Jan-2012 15:39 1.0K header file [   ] mgh036.ari 02-Dec-1992 11:10 16K beat and event annotations [   ] mgh036.dat 02-Dec-1992 11:10 19M digitized signal(s) [   ] mgh036.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh037.ari 02-Dec-1992 11:10 23K beat and event annotations [   ] mgh037.dat 02-Dec-1992 11:10 20M digitized signal(s) [   ] mgh037.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh038.ari 02-Dec-1992 11:10 17K beat and event annotations [   ] mgh038.dat 02-Dec-1992 11:10 18M digitized signal(s) [   ] mgh038.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh039.ari 02-Dec-1992 11:10 23K beat and event annotations [   ] mgh039.dat 02-Dec-1992 11:10 21M digitized signal(s) [   ] mgh039.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh040.ari 02-Dec-1992 11:10 13K beat and event annotations [   ] mgh040.dat 02-Dec-1992 11:10 21M digitized signal(s) [   ] mgh040.hea 23-Jan-2012 15:39 534 header file [   ] mgh041.ari 02-Dec-1992 11:10 3.7K beat and event annotations [   ] mgh041.dat 02-Dec-1992 11:10 21M digitized signal(s) [   ] mgh041.hea 23-Jan-2012 15:39 620 header file [   ] mgh042.ari 02-Dec-1992 11:10 35K beat and event annotations [   ] mgh042.dat 02-Dec-1992 11:10 8.2M digitized signal(s) [TXT] mgh042.hea 23-Jan-2012 15:39 1.8K header file [   ] mgh043.ari 02-Dec-1992 11:10 44K beat and event annotations [   ] mgh043.dat 02-Dec-1992 11:10 21M digitized signal(s) [   ] mgh043.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh044.ari 02-Dec-1992 11:10 19K beat and event annotations [   ] mgh044.dat 02-Dec-1992 11:10 13M digitized signal(s) [   ] mgh044.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh045.ari 02-Dec-1992 11:10 149K beat and event annotations [   ] mgh045.dat 02-Dec-1992 11:10 16M digitized signal(s) [   ] mgh045.hea 23-Jan-2012 15:39 2.2K header file [   ] mgh046.ari 02-Dec-1992 11:10 47K beat and event annotations [   ] mgh046.dat 02-Dec-1992 11:10 16M digitized signal(s) [   ] mgh046.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh047.ari 02-Dec-1992 11:10 79K beat and event annotations [   ] mgh047.dat 02-Dec-1992 11:10 22M digitized signal(s) [   ] mgh047.hea 23-Jan-2012 15:39 1.6K header file [   ] mgh048.ari 02-Dec-1992 11:10 11K beat and event annotations [   ] mgh048.dat 02-Dec-1992 11:10 8.7M digitized signal(s) [   ] mgh048.hea 23-Jan-2012 15:39 812 header file [   ] mgh049.ari 02-Dec-1992 11:10 41K beat and event annotations [   ] mgh049.dat 02-Dec-1992 11:10 18M digitized signal(s) [   ] mgh049.hea 23-Jan-2012 15:39 2.1K header file [   ] mgh050.ari 02-Dec-1992 11:10 211K beat and event annotations [   ] mgh050.dat 02-Dec-1992 11:10 16M digitized signal(s) [   ] mgh050.hea 23-Jan-2012 15:39 1.9K header file [   ] mgh051.ari 14-Dec-1992 15:51 84K beat and event annotations [   ] mgh051.dat 14-Dec-1992 15:51 16M digitized signal(s) [   ] mgh051.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh052.ari 14-Dec-1992 15:51 25K beat and event annotations [   ] mgh052.dat 14-Dec-1992 15:51 15M digitized signal(s) [   ] mgh052.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh053.ari 14-Dec-1992 15:51 23K beat and event annotations [   ] mgh053.dat 14-Dec-1992 15:51 16M digitized signal(s) [   ] mgh053.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh054.ari 14-Dec-1992 15:51 15K beat and event annotations [   ] mgh054.dat 14-Dec-1992 15:51 21M digitized signal(s) [   ] mgh054.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh055.ari 14-Dec-1992 15:51 19K beat and event annotations [   ] mgh055.dat 14-Dec-1992 15:51 14M digitized signal(s) [   ] mgh055.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh056.ari 14-Dec-1992 15:51 19K beat and event annotations [   ] mgh056.dat 14-Dec-1992 15:51 15M digitized signal(s) [   ] mgh056.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh057.ari 14-Dec-1992 15:51 12K beat and event annotations [   ] mgh057.dat 14-Dec-1992 15:51 15M digitized signal(s) [   ] mgh057.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh058.ari 14-Dec-1992 15:51 71K beat and event annotations [   ] mgh058.dat 14-Dec-1992 15:51 9.9M digitized signal(s) [   ] mgh058.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh059.ari 14-Dec-1992 15:51 27K beat and event annotations [   ] mgh059.dat 14-Dec-1992 15:51 20M digitized signal(s) [   ] mgh059.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh060.ari 14-Dec-1992 15:51 6.8K beat and event annotations [   ] mgh060.dat 14-Dec-1992 15:51 8.7M digitized signal(s) [   ] mgh060.hea 23-Jan-2012 15:39 1.0K header file [   ] mgh061.ari 14-Dec-1992 15:51 24K beat and event annotations [   ] mgh061.dat 14-Dec-1992 15:51 19M digitized signal(s) [   ] mgh061.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh062.ari 14-Dec-1992 15:51 69K beat and event annotations [   ] mgh062.dat 14-Dec-1992 15:51 15M digitized signal(s) [   ] mgh062.hea 23-Jan-2012 15:39 1.0K header file [   ] mgh063.ari 14-Dec-1992 15:51 13K beat and event annotations [   ] mgh063.dat 14-Dec-1992 15:51 18M digitized signal(s) [   ] mgh063.hea 23-Jan-2012 15:39 1.6K header file [   ] mgh064.ari 14-Dec-1992 15:51 30K beat and event annotations [   ] mgh064.dat 14-Dec-1992 15:51 21M digitized signal(s) [   ] mgh064.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh065.ari 14-Dec-1992 15:51 28K beat and event annotations [   ] mgh065.dat 14-Dec-1992 15:51 17M digitized signal(s) [   ] mgh065.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh066.ari 14-Dec-1992 15:51 31K beat and event annotations [   ] mgh066.dat 14-Dec-1992 15:51 9.6M digitized signal(s) [   ] mgh066.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh067.ari 14-Dec-1992 15:51 77K beat and event annotations [   ] mgh067.dat 14-Dec-1992 15:51 17M digitized signal(s) [   ] mgh067.hea 23-Jan-2012 15:39 2.0K header file [   ] mgh068.ari 14-Dec-1992 15:51 18K beat and event annotations [   ] mgh068.dat 14-Dec-1992 15:51 18M digitized signal(s) [   ] mgh068.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh069.ari 14-Dec-1992 15:51 17K beat and event annotations [   ] mgh069.dat 14-Dec-1992 15:51 19M digitized signal(s) [   ] mgh069.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh070.ari 14-Dec-1992 15:51 39K beat and event annotations [   ] mgh070.dat 14-Dec-1992 15:51 19M digitized signal(s) [   ] mgh070.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh070.hea- 14-Dec-1992 15:51 612 header file [   ] mgh071.ari 14-Dec-1992 15:51 101K beat and event annotations [   ] mgh071.dat 14-Dec-1992 15:51 20M digitized signal(s) [   ] mgh071.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh072.ari 14-Dec-1992 15:51 16K beat and event annotations [   ] mgh072.dat 14-Dec-1992 15:51 21M digitized signal(s) [   ] mgh072.hea 23-Jan-2012 15:39 1.6K header file [   ] mgh073.ari 14-Dec-1992 15:51 40K beat and event annotations [   ] mgh073.dat 14-Dec-1992 15:51 21M digitized signal(s) [   ] mgh073.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh074.ari 14-Dec-1992 15:51 17K beat and event annotations [   ] mgh074.dat 14-Dec-1992 15:51 18M digitized signal(s) [   ] mgh074.hea 23-Jan-2012 15:39 1.5K header file [   ] mgh075.ari 14-Dec-1992 15:51 4.8K beat and event annotations [   ] mgh075.dat 14-Dec-1992 15:51 7.1M digitized signal(s) [   ] mgh075.hea 23-Jan-2012 15:39 594 header file [   ] mgh076.ari 05-Jan-1993 13:56 41K beat and event annotations [   ] mgh076.dat 05-Jan-1993 13:56 19M digitized signal(s) [   ] mgh076.hea 23-Jan-2012 15:39 1.4K header file [   ] mgh077.ari 05-Jan-1993 13:56 27K beat and event annotations [   ] mgh077.dat 05-Jan-1993 13:56 16M digitized signal(s) [   ] mgh077.hea 23-Jan-2012 15:39 941 header file [   ] mgh077.hea- 05-Jan-1993 13:56 616 header file [   ] mgh078.ari 05-Jan-1993 13:56 33K beat and event annotations [   ] mgh078.dat 05-Jan-1993 13:56 20M digitized signal(s) [   ] mgh078.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh079.ari 05-Jan-1993 13:56 12K beat and event annotations [   ] mgh079.dat 05-Jan-1993 13:56 17M digitized signal(s) [   ] mgh079.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh080.ari 05-Jan-1993 13:56 17K beat and event annotations [   ] mgh080.dat 05-Jan-1993 13:56 13M digitized signal(s) [   ] mgh080.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh081.ari 05-Jan-1993 13:56 29K beat and event annotations [   ] mgh081.dat 05-Jan-1993 13:56 15M digitized signal(s) [   ] mgh081.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh082.ari 05-Jan-1993 13:56 27K beat and event annotations [   ] mgh082.dat 05-Jan-1993 13:56 15M digitized signal(s) [   ] mgh082.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh083.ari 05-Jan-1993 13:56 12K beat and event annotations [   ] mgh083.dat 05-Jan-1993 13:56 15M digitized signal(s) [   ] mgh083.hea 23-Jan-2012 15:39 1.3K header file [   ] mgh084.ari 05-Jan-1993 13:56 15K beat and event annotations [   ] mgh084.dat 05-Jan-1993 13:56 11M digitized signal(s) [   ] mgh084.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh085.ari 05-Jan-1993 13:56 40K beat and event annotations [   ] mgh085.dat 05-Jan-1993 13:56 20M digitized signal(s) [   ] mgh085.hea 23-Jan-2012 15:39 1.1K header file [   ] mgh086.ari 05-Jan-1993 13:56 39K beat and event annotations [   ] mgh086.dat 05-Jan-1993 13:56 21M digitized signal(s) [   ] mgh086.hea 23-Jan-2012 15:39 1.6K header file [   ] mgh087.ari 05-Jan-1993 13:56 17K beat and event annotations [   ] mgh087.dat 05-Jan-1993 13:56 16M digitized signal(s) [   ] mgh087.hea 23-Jan-2012 15:39 1.2K header file [   ] mgh088.ari 05-Jan-1993 13:56 13K beat and event annotations [   ] 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