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. Synonym(s): auditory alternans
aus·cul·ta·to·ry al·ter·nans
(aws-kŭl'tă-tōr-ē awl-tĕr'nanz) Alternation in the intensity of heart sounds or murmurs in the presence of a regular cardiac rhythm.