delta wave


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Related to delta wave: theta wave

del·ta wave

a premature upstroke of the QRS complex due to an atrial ventricular bypass tract as in WPW syndrome.

delta wave

n.
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.
Cardiology 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
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

delta wave

Cardiology 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.

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.

delta wave

A low-frequency brain wave, recordable on the ELECTROENCEPHALOGRAM, that originates in the frontal part of the brain during deep sleep in normal adults.
References in periodicals archive ?
ECG algorithm involving delta wave is found to be significantly better as compard to Taguchi et al.
A wide QRS and prominent delta wave are characteristic of antidromic tachycardia.
In Table 1, there are delta waves (frequency 0.5-4 Hz), theta waves (frequency 4-7 Hz), alpha waves (frequency 8-13 Hz), beta waves (frequency 14-30 Hz), and gamma waves (frequency 30 Hz and over) [11].
Senhadji, "Investigation of the modulation between EEG alpha waves and slow/fast delta waves in children in different depths of Desflurane anesthesia," IRBM, vol.
For example, "Our sleep titles help drop you into the deep delta waves. Electrical activity in the brain gets slowed down." Some of the products are designed to help people recover from a stroke or surgery, deal with chronic pain, or become more relaxed while undergoing chemotherapy.
Transported into delta waves by music like this, a listener gets the distinct impression that the composer and musicians are, in fact, intentional and instrumental hypnotists.
Theta (5-8 Hz) and delta waves (0-4 Hz) are observed when a person is daydreaming and sleeping respectively.
"There's a debate in the medical literature about whether deep sleep - delta waves - consists of one stage or two," explained Toronto psychiatrist Colin Shapiro.
Paradoxical arousal describes a change, in the opposite direction, to a pattern dominated by higher-amplitude, lower-frequency waveforms (delta waves).
They recorded EEGs that show slow, regular waves, called delta waves, during the deepest parts of the sleep cycle.
Stage Description Duration W Wakefulness ~16 hours N1 Somnolence; "drowsy," easily awakened 1-5% N2 Asleep -50% N3 Slow Wave Sleep ~7% (SWS) Transition to deep sleep N4 Slow Wave Sleep ~20-25% (SWS) Deep sleep REM1-4 Rapid Eye Movement ~20-25% Stage EEG Brainwave pattern Events and abnormalities W Alpha waves Daytime consciousness N1 Theta waves Hypnogogic twitches, hallucinations N2 Slower waves, sleep spindles, K-complexes Unconsciousness N3 <50% delta waves Melatonin peak, (SWS) night terrors, parasomnias N4 >50% delta waves Minimum core temperature, (SWS) rebounds after deprivation REM1-4 Rapid low-voltage EEG Dreaming, low muscle tone, rebounds after deprivation
Electrical brain activity during the concentration stress test was significantly increased for both theta and delta waves in the Neuravena group, researchers noted.