Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

alternans

play
noun al·ter·nans \ˈȯl-tər-ˌnanz\

Medical Definition of alternans

  1. :  alternation in the pattern of activity (such as that produced by the heartbeat) <Her electrocardiogram showed small spikes that alternated in shape—a classic sign of cardiac tamponade called electrical alternans.—Tony Dajer, Discover, March 2002> <The noninvasive detection of an increased risk of ventricular fibrillation may be made possible by the identification of T-wave alternans, a beat-to-beat fluctuation in the area under the T wave that is associated with an increased risk of lethal arrhythmia.—James E. Muller and Richard L. Verrier, The New England Journal of Medicine, 15 Feb. 1996>—see pulsus alternans




Seen and Heard

What made you want to look up alternans? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to take off or remove

Get Word of the Day daily email!