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The databases described here are likely to be of interest to many readers, although they are not currently available in PhysioBank. Please use the contact information below to obtain further information on these resources, since they are independent of PhysioNet; in general, we have no further information about them.
If you are the curator of one of the databases listed below, we encourage you
to contribute one or more samples to be posted here. We also welcome
corrections and suggestions for this page; please use the link at the bottom
of the page to write to us.
AHA Database
The American Heart Association (AHA), with funding from the National Heart, Lung, and Blood Institute (NHLBI), sponsored the development of the AHA Database for Evaluation of Ventricular Arrhythmia Detectors during the late 1970s and early 1980s at Washington University (St. Louis). The first portions of the AHA Database were released in 1982, and it was completed in 1985.
Until recently, the only available portion of the AHA database consisted of 80 two-channel excerpts of analog ambulatory ECG recordings, digitized at 250 Hz per channel with 12-bit resolution over a 10 mV range. These recordings are divided into eight ``classes'' of ten recordings each, according to the highest level of ventricular ectopy present:
The final thirty minutes of each recording are annotated beat-by-beat, although supraventricular ectopic beats are not distinguished from normal sinus beats. Two versions of the database are available: the ``short'' version includes five minutes of unannotated ECG signals prior to the thirty-minute annotated segment of each recording, and the ``long'' version includes 2.5 hours of unannotated ECG signals prior to each annotated segment.
At the time the AHA Database was created, a second set of 75 recordings was constructed according to the same criteria as the first set (only 5 recordings in the R-on-T PVC class were available in this set). This second set was intended for evaluations without any possibility that the detectors might have been ``tuned'' (optimized) for the test data; for this reason, this ``test set'' was unavailable until recently.
Both sets of the AHA Database are now available on CD-ROMs from:
The WFDB Software Package includes a set of converters that can translate between the formats used for the AHA database and the standard formats used for PhysioBank databases.
A record that was excluded from the AHA Database is available here.
Ann Arbor Electrogram Libraries
These annotated recordings of intracardiac electrograms were made and annotated by Dr. Janice Jenkins and her colleagues at the University of Michigan over a period of more than fifteen years. This collection of over 800 recordings, made during electrophysiology studies, is a uniquely valuable resource, particularly for developers and evaluators of implantable cardiac devices. Since intracardiac electrograms can reveal atrial activity much more clearly than typical surface ECGs, these recordings are also useful for basic research in cardiac electrophysiology. The recordings are available from:
The Common Standards for Electrocardiography (CSE) Database is a collection of approximately 1000 short (12- or 15-lead) ECG recordings, designed for evaluating diagnostic ECG analyzers. It is available on a CD-ROM (not in PhysioBank format) from:
IMPROVE is a European Union concerted action project with the goal of improving on-line assessment and management of patient state in critical care and operating theater environments. The project has developed a large collection of recordings (more than 1300 hours, from 50 subjects) of multiple physiologic signals made in critical care units, extensively annotated and supplemented by simultaneously acquired clinical information. The database is available on nine CD-ROMs (in European Data Format). For further information, see this note. Contact:
A sample record was formerly available from the IMPROVE project's web site, http://www.vtt.fi/tte/samba/projects/improve/improve.htm, but this URL is no longer functional.
A program that converts the binary EDF format used for the Improve Data Library
into a format compatible with the PhysioToolkit software is available here.
Download edf2mit in C
source form (9 Kb), or look for a precompiled version for your OS on the
PhysioToolkit Binaries page.
12-lead ECG Library
This resource is a well-organized collection of 12-lead ECGs, available via the Web at http://www.ecglibrary.com/ecghome.html. The ECGs are available as images only. Also available at this site is an extensive set of links to other ECG resources on the Web.
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Updated Monday, 25-Feb-2008 13:43:31 EST