chalasia /cha·la·sia/ (kah-la´zhah) relaxation of a bodily opening, such as the cardiac sphincter (a cause of vomiting in infants).
chalasia
chalasia
cha·la·sia (k -l  zh) or cha·la·sis (-ls s)n. The inhibition and relaxation of a previously sustained contraction of a muscle or synergistic group of muscles, such as the cardiac sphincter. |
chalasia
[kəlā′zhə]
Etymology: Gk, chalasis, relaxation
abnormal relaxation or incompetence of the cardiac sphincter of the stomach, resulting in reflux of the gastric contents into the esophagus with subsequent regurgitation. Conservative treatment in infancy includes feeding several small meals a day to prevent distension of the stomach and holding the baby upright while giving the feeding. The symptoms and treatment are similar to those of a hiatal hernia. See also gastroesophageal reflux.
chalasia
relaxation of a bodily opening, such as the cardiac sphincter. See also megaesophagus.
chalasia
Pediatrics Gastroesophageal reflux (GERD) in infants which, if severe, may be associated with ↑ vomiting, crying, discomfort, possibly ↑ risk of GERD as adults. See GERD.
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