
This database includes long-term ECG recordings from 15 subjects (11 men, aged 22 to 71, and 4 women, aged 54 to 63) with severe congestive heart failure (NYHA class 3-4). This group of subjects was part of a larger study group receiving conventional medical therapy prior to receiving the oral inotropic agent, milrinone. Further details about the larger study group are available in reference 1. A number of additional studies have made use of these recordings; see references 2-10.
The individual recordings are each about 20 hours in duration, and contain two ECG signals each sampled at 250 samples per second with 12-bit resolution over a range of ±10 millivolts. The original analog recordings were made at Boston's Beth Israel Hospital (now the Beth Israel Deaconess Medical Center) using ambulatory ECG recorders with a typical recording bandwidth of approximately 0.1 Hz to 40 Hz. Annotation files (with the suffix .ecg) were prepared using an automated detector and have not been corrected manually.
Name Last modified Size Description
Parent Directory -
ANNOTATORS 13-Oct-2000 14:29 58 list of annotators
MD5SUMS 12-Jul-2005 21:50 2.2K
RECORDS 05-Oct-2000 23:58 90 list of record names
SHA1SUMS 12-Jul-2005 21:57 2.6K
SHA256SUMS 18-Sep-2007 12:37 3.9K
chf01.dat 05-Oct-2000 22:53 51M digitized signal(s)
chf01.ecg 05-Oct-2000 23:39 148K unaudited annotations
chf01.hea 05-Apr-2008 18:05 146 header file
chf01.hea- 18-Feb-2003 20:33 138 header file
chf02.dat 05-Oct-2000 22:54 51M digitized signal(s)
chf02.ecg 14-Jul-2003 23:48 224K unaudited annotations
chf02.ecg- 05-Oct-2000 23:42 222K unaudited annotations
chf02.hea 05-Apr-2008 18:05 145 header file
chf02.hea- 18-Feb-2003 20:33 137 header file
chf03.dat 05-Oct-2000 22:55 51M digitized signal(s)
chf03.ecg 05-Oct-2000 23:43 159K unaudited annotations
chf03.hea 05-Apr-2008 18:05 145 header file
chf03.hea- 18-Feb-2003 20:33 137 header file
chf04.dat 05-Oct-2000 22:57 51M digitized signal(s)
chf04.ecg 14-Jul-2003 22:28 540K unaudited annotations
chf04.ecg- 05-Oct-2000 22:56 173K unaudited annotations
chf04.hea 05-Apr-2008 18:05 146 header file
chf04.hea- 18-Feb-2003 20:33 138 header file
chf05.dat 05-Oct-2000 22:58 51M digitized signal(s)
chf05.ecg 05-Oct-2000 23:47 233K unaudited annotations
chf05.hea 05-Apr-2008 18:05 146 header file
chf05.hea- 18-Feb-2003 20:33 138 header file
chf06.dat 05-Oct-2000 23:00 51M digitized signal(s)
chf06.ecg 05-Oct-2000 23:49 233K unaudited annotations
chf06.hea 05-Apr-2008 18:05 146 header file
chf06.hea- 18-Feb-2003 20:32 138 header file
chf07.dat 05-Oct-2000 23:01 51M digitized signal(s)
chf07.ecg 05-Oct-2000 23:50 181K unaudited annotations
chf07.hea 05-Apr-2008 18:05 145 header file
chf07.hea- 18-Feb-2003 20:32 137 header file
chf08.dat 05-Oct-2000 23:03 51M digitized signal(s)
chf08.ecg 05-Oct-2000 23:50 177K unaudited annotations
chf08.hea 05-Apr-2008 18:05 145 header file
chf08.hea- 18-Feb-2003 20:32 137 header file
chf09.dat 05-Oct-2000 23:04 51M digitized signal(s)
chf09.ecg 05-Oct-2000 23:52 225K unaudited annotations
chf09.hea 05-Apr-2008 18:05 141 header file
chf09.hea- 18-Feb-2003 20:32 133 header file
chf10.dat 05-Oct-2000 23:09 51M digitized signal(s)
chf10.ecg 05-Oct-2000 23:52 288K unaudited annotations
chf10.hea 05-Apr-2008 18:05 144 header file
chf10.hea- 18-Feb-2003 20:32 136 header file
chf11.dat 05-Oct-2000 23:10 51M digitized signal(s)
chf11.ecg 05-Oct-2000 23:54 226K unaudited annotations
chf11.hea 05-Apr-2008 18:05 146 header file
chf11.hea- 18-Feb-2003 20:32 138 header file
chf12.dat 05-Oct-2000 23:11 51M digitized signal(s)
chf12.ecg 05-Oct-2000 23:55 225K unaudited annotations
chf12.hea 05-Apr-2008 18:05 143 header file
chf12.hea- 18-Feb-2003 20:32 135 header file
chf13.dat 05-Oct-2000 23:13 51M digitized signal(s)
chf13.ecg 05-Oct-2000 23:55 226K unaudited annotations
chf13.hea 05-Apr-2008 18:05 147 header file
chf13.hea- 18-Feb-2003 20:32 139 header file
chf14.dat 05-Oct-2000 23:14 51M digitized signal(s)
chf14.ecg 05-Oct-2000 23:56 183K unaudited annotations
chf14.hea 05-Apr-2008 18:05 145 header file
chf14.hea- 18-Feb-2003 20:31 137 header file
chf15.dat 05-Oct-2000 23:17 51M digitized signal(s)
chf15.ecg 05-Oct-2000 23:57 225K unaudited annotations
chf15.hea 05-Apr-2008 18:05 150 header file
chf15.hea- 18-Feb-2003 20:31 142 header file
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