His frowning face was pallid and quivered.
An electrocardiogram (ECG, EKG) that records the electrical activity in the heart may be used to check for heart rhythm abnormalities, such as long QT syndrome, in children who have had a pallid breath holding spell.
The child cries or gasps, forcibly exhales, stops breathing, and turns either blue (cyanotic form) or pale (pallid form).
About 25 percent of affected children-particularly those who experience pallid BHS-have a family history of BHS or fainting.
Its most characteristic animals and birds are the white-tailed jack-rabbit, pallid vole, sage hen, sharp-tailed grouse and greentailed towhee; the large Columbia ground-squirrel (Spermophflus columbianus) is common in that part of the zone which re west of the Rocky Mountains, but east of the Rockies it is replaced by another species (Cynomys) which closely resembles a small prairie dog.