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Related to delta wave: theta wave
a premature upstroke of the QRS complex due to an atrial ventricular bypass tract as in WPW syndrome.
Farlex Partner Medical Dictionary © Farlex 2012
An electrical oscillation occurring in the human brain at a frequency of less than about four hertz as recorded on an electroencephalogram, associated with a state of deep sleep or unconsciousness. Also called delta rhythm.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Sleep disorders EEG activity with a frequency of < 4 Hz; in human sleep scoring, the minimum criteria for scoring DWs is 75 µV—peak-to-peak amplitude—and 0.5 second duration—2 Hz
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
delta waveCardiology An EKG finding in WPW syndrome, seen as a slow upstroke of the QRS wave in a background of short P-R intervals. See Wolff-Parkinson-White syndrome.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
del·ta wave(del'tă wāv)
1. A premature upstroke of the QRS complex due to an atrioventricular bypass tract as in Wolff-Parkinson-White syndrome.
2. Synonym(s): delta rhythm.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
delta waveA low-frequency brain wave, recordable on the ELECTROENCEPHALOGRAM, that originates in the frontal part of the brain during deep sleep in normal adults.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005