Creighton University Ventricular Tachyarrhythmia (35 records)
This database includes 35 eight-minute ECG recordings of human subjects who experienced episodes of sustained ventricular tachycardia, ventricular flutter, and ventricular fibrillation.
Record cu01 was obtained from a long-term ECG (Holter) recording (played back at real time for digitization); the other records were digitized in real time from high-level (1 V/mV nominal) analog signals from patient monitors. All signals were passed through an active second-order Bessel low-pass filter with a cutoff of 70 Hz, and were digitized at 250 Hz with 12-bit resolution over a 10 V range (10 mV nominal relative to the unamplified signals). Each record contains 127,232 samples (slightly less than 8.5 minutes). more...
In episodes of cardiac failure, fibrillation is almost always preceded by a run of ventricular tachycardia, which eventually gives way to the fibrillation itself. The onset of fibrillation is extremely difficult to pinpoint in many cases. Any clinically useful detector should respond to the runs of tachycardia preceding fibrillation, since medical intervention is needed at the earliest opportunity. Thus any detector responding to the premonitory tachycardia can exhibit a negative ``time to alarm'' compared to the onset of fibrillation as recorded in the reference annotation files. For this reason, the database is defined as a tachyarrhythmia database rather than a fibrillation database.
For more information:
- Nolle FM, Badura FK, Catlett JM, Bowser RW, Sketch MH. CREI-GARD, a new concept in computerized arrhythmia monitoring systems. Computers in Cardiology 13:515-518 (1986).
- 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).