abnormal closure of a heart valve resulting in failure to prevent regurgitation of blood.
Also called valvular incompetence.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Failure of the cardiac valves to close perfectly, thus allowing regurgitation of blood past the closed valve.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.