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| the body's oxygen deficiency resulting from strenuous physical activity |
| the circulation of blood from the heart to the lungs for oxygenation and back to the heart |
| delta rhythm or delta wave | |
| —n | |
| physiol See also brain wave the normal electrical activity of the cerebral cortex during deep sleep, occurring at a frequency of 1 to 4 hertz and detectable with an electroencephalograph | |
| delta wave or delta wave | |
| —n | |
delta wave n.
A slurring of the R-wave upstroke in an electrocardiogram as seen in Wolff-Parkinson-White syndrome.
See delta rhythm.