delta wave

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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 ?
The Arruda ECG algorithm included delta wave polarity in its design while the Taguchi ECG algorithm included R/S ratio.
The predictive accuracy for Arruda algorithm based on delta wave was found to be significantly higher as compared to Taguchi algorit hm based on R/S ratio (p 0.
The goal in treating the sleep disorder in fibromyalgia is to get the patient into deep, delta wave sleep.
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.
Subsequent ECG revealed normalization of the PR and QRS intervals and the absence of delta waves (Figure 3).
Melatonin, delta waves, and cooling caps sidestep what Naiman calls the most common sleep-wrecker: 21st-century hyperarousal.
Reson-8, for example, contains eight audio programs: three for inducing alpha waves, three for theta waves, and two for delta waves.
17s) and has prominent delta waves in virtually all leads suggesting ventricular preexcitation via an A-V bypass tract, probably anteroseptal in location.
Delta: Delta waves tend to be slower and are often associated with deep dreamless, restorative sleep.
Stage 3 sleep is characterized by 20% to 50% delta waves, and stage 4 has more than 50% delta waves.