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.
The database consisted of 80 two-channel excerpts of analog ambulatory ECG recordings, digitized at 250 Hz per channel with 12-bit resolution over a 20 mV range. These recordings are divided into eight ``classes'' of ten recordings each, according to the highest level of ventricular ectopy present, for no ventricular ectopy and isolated unifocal and multifocal arrhythmia, to ventricular tachycardia and ventricular flutter/fibrillation.
The data is stored by ECRI (formerly the Emergency Care Research Institute), an independent nonprofit health services research agency 4.
ECRI
5200 Butler Pike
Plymouth Meeting, PA 19462 USA.
http://www.ecri.org/