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alternans
(redirected from mechanical alternans)

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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.

al·ter·nans (ôl-tûrnnz)
adj.
Alternating, as in heart contractions.
n.
Alternation in the contractions of the heart.

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


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