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Regurgitation

 
Veterinary Dictionary: regurgitation
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A backward flowing, as the casting up of undigested food, or the backflow of blood through a defective heart valve. In the alimentary canal the regurgitation of food comes from the esophagus, as distinct from vomiting in which the food comes from the stomach. A sign of pyloric obstruction or megaesophagus.

  • r. cycle — see reticular cycle.
  • neurotic r. — regurgitation by budgerigars is a common phenomenon with no physiological explanation and is considered to be an expression of affection.
  • valvular r. — backflow of blood through the orifices of the heart valves owing to imperfect closing of the valves (valvular insufficiency); named, according to the valve affected, aortic, mitral, pulmonic or tricuspid regurgitation.
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Wikipedia: Regurgitation (circulation)
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Regurgitation is blood flow in the opposite direction from normal, as the backward flowing of blood into the heart or between heart chambers. Can be categorized by:

  1. aortic: the backflow of blood from the aorta into the left ventricle, owing to insufficiency of the aortic semilunar valve; it may be chronic or acute.
  2. mitral: the backflow of blood from the left ventricle into the left atrium, owing to insufficiency of the mitral valve; it may be acute or chronic, and is usually due to mitral valve prolapse, rheumatic heart disease, or a complication of cardiac dilatation. See also Mitral regurgitation.
  3. pulmonic: the backflow of blood from the pulmonary artery into the right ventricle, owing to insufficiency of the pulmonic semilunar valve.
  4. tricuspid: the backflow of blood from the right ventricle into the right atrium, owing to imperfect functioning (insufficiency) of the tricuspid valve.
  5. valvular: regurgitation of the blood through the orifices of the heart valves owing to imperfect closing of the valves; see aortic, mitral, pulmonic, and tricuspid.
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Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.  Read more
Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Regurgitation (circulation)".  Read more