PhysioBank is a large and growing archive of well-characterized digital recordings of physiologic signals and related data for use by the biomedical research community. PhysioBank currently includes databases of multi-parameter cardiopulmonary, neural, and other biomedical signals from healthy subjects and patients with a variety of conditions with major public health implications, including sudden cardiac death, congestive heart failure, epilepsy, gait disorders, sleep apnea, and aging.
First-time visitors should read An Introduction to the PhysioBank Archives, which contains pointers to samples of data and suggestions for viewing them. (It's also easy to view PhysioBank data within a web browser using the PhysioBank ATM.) The PhysioBank Archives now contain over 700 gigabytes of data that may be freely downloaded.
If you wish to download all of the files in any of the PhysioBank databases without selecting each one individually, see the PhysioNet FAQ for ways to do this efficiently.