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.

delta wave

1 also called delta rhythm, the slowest of several types of brain waves, characterized by a frequency of 4 Hz and a relatively high voltage. Delta waves are "deep-sleep waves" associated with a dreamless state from which an individual is not easily aroused. Compare alpha wave, beta wave, theta wave.
2 (in cardiology) a slurring of the QRS portion of an electrocardiogram tracing caused by preexcitation in Wolff-Parkinson-White syndrome.
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.
It is reported in various studies that interpretation of delta wave polarity is very subjective in nature and is difficult to access10-14, but Arruda et al.
concluded that the algorithms that did not include delta wave polarity assessment in their architecture had lower accuracy in predicting accessory pathways15.
The decrease in delta waves observed while teens sleep could be caused by a reduction in the size of groups of brain cells that "talk" to one another.
Delta waves are the signature frequency of the brainstem or first-line consciousness.
Theta waves, generated by the limbic system or the feeling level, are faster than first-line delta waves.
Melatonin, delta waves, and cooling caps sidestep what Naiman calls the most common sleep-wrecker: 21st-century hyperarousal.
Delta: Delta waves tend to be slower and are often associated with deep dreamless, restorative sleep.
Theta: Theta waves are faster than delta waves, but still slow and typically are correlated with light sleep, daydreaming, inattention, creativity, and self-hypnosis.
Reson-8, for example, contains eight audio programs: three for inducing alpha waves, three for theta waves, and two for delta waves.
Stage 3 sleep is characterized by 20% to 50% delta waves, and stage 4 has more than 50% delta waves.