alternans

(redirected from mechanical alternans)

al·ter·nans

(awl-ter'nanz), Avoid the mispronunciation al'ter-nans.
Alternating; often used substantively for alternation of the heart, either electrical or mechanical; used as a noun in the sense of pulsus alternans.
[L.]

alternans

/al·ter·nans/ (awl-ter´nanz) [L.]
1. alternating; see pulsus alternans.

electrical alternans  alternating variations in the amplitude of specific electrocardiographic waves over successive cardiac cycles.
mechanical alternans  alternation of the heart, particularly in contrast to electrical alternans.
pul´sus alternans  see under pulsus.
total alternans  pulsus alternans in which alternating beats are so weak as to be undetected, causing apparent halving of the pulse rate.

alternans

[ôl′tərnənz]
Etymology: L, alternare, to alternate

al·ter·nans

(awl-ter'nanz)
Alternating; used as a noun in the sense of pulsus alternans
[L.]
References in periodicals archive ?
Discordant T Wave and Mechanical Alternans in Left Ventricular Hypertrophy: Role of Late Sodium Current; Poster Presentation, Wednesday, November 12, 2008, 9:00 a.

Full browser ?