defibrillation (n.)youdaoicibaDictYouDict[defibrillation 词源字典]
1940, in reference to heartbeat, from de- + fibrillation "a beating in an abnormal way," especially of the muscles of the heart that contract irregularly in this condition.[defibrillation etymology, defibrillation origin, 英语词源]
defibrillator (n.)youdaoicibaDictYouDict
1956, agent noun from defibrillation.
fibrillar (adj.)youdaoicibaDictYouDict
"pertaining to or of the nature of fibrillae," 1847, from fibrilla (see fibril) + -ar.
fibrillate (v.)youdaoicibaDictYouDict
1798, "form into fibrils or fibers," from fibrilla (see fibril) + -ate (2). Related: Fibrillated; fibrillating.
fibrillation (n.)youdaoicibaDictYouDict
1842, "state of being fibrillar" (that is, "arranged in fibrils"), noun of action from fibrillate (v.). Especially "a quavering in the fibrils of the muscles of the heart" causing irregular beating (1882).
atrial fibrillationyoudaoicibaDictYouDict
"Irregular, uncoordinated twitching or quivering (as opposed to regular contraction) of the atria of the heart, typically associated with irregular and often rapid ventricular contraction", Early 20th cent.; earliest use found in Journal of the American Medical Association.