alternans
Alternating; often used substantively for alternation of the heart, either electrical or mechanical. Alternating; used as a noun in the sense of pulsus a.. [L.]
- auditory a. SYN: auscultatory a..
- auscultatory a. alternation in the intensity of heart sounds or murmurs in the presence of a regular cardiac rhythm as a result of mechanical alternation of the heart. SYN: auditory a..
- concordant a. simultaneous occurrence of right ventricular and pulmonary artery a. with left ventricular and peripheral pulsus a..
- cycle length a. a succession of long and short diastolic intervals.
- discordant a. presence of right ventricular and pulmonary artery a. with peripheral pulsus a., but with the strong beat of the right ventricle coinciding with the weak beat of the left and vice versa.
- electrical a. electrical alternation of the heart.

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al·ter·nans (awl-turґnanz) [L., pres. part. of alternare to do by turns] 1. alternating; see pulsus alternans, under pulsus. 2. alternation.

Medical dictionary. 2011.

Look at other dictionaries:

  • Alternans — (lat., Bot.), abwechselnd, wenn Organe mit anderen ungleichnamigen Theilen so gestellt sind, daß sie in od. vor den Zwischenräumen derselben sich befinden; dagegen Alternus, wechselständig, abwechselnd, wenn einzelne Theile aus einer… …   Pierer's Universal-Lexikon

  • alternans —   L. alterno, change.   1) Rhachis produced into setaceous lobes opposite all or some of the spikelets. Plagiochloa alternans, Tribolium alternans   2) panicle branches arising from alternate nodes. Andropogon alternans …   Etymological dictionary of grasses

  • alternans — n. alternating; alternation (as in pulsus alternans in Medicine) …   English contemporary dictionary

  • alternans — altẹrnans vgl. alternierend …   Das Wörterbuch medizinischer Fachausdrücke

  • T wave alternans — (TWA) is a periodic beat to beat variation in the amplitude or shape of the T wave in an electrocardiogram (ECG or EKG). T wave of ECG TWA was first described in 1908. At that time, only large variations ( macroscopic TWA) could be detected.… …   Wikipedia

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  • Grandisonia alternans — Grandisonia alternans …   Wikipédia en Français

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  • Omorgus alternans — Omorgus alternans, adult Scientific classification Kingdom …   Wikipedia

  • Grandisonia alternans — Taxobox name = Grandisonia alternans status = LC | status system = IUCN3.1 regnum = Animalia phylum = Chordata classis = Amphibia ordo = Gymnophiona familia = Caeciliidae genus = Grandisonia species = G. alternans binomial = Grandisonia alternans …   Wikipedia

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