Tic-tac rhythm

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tic-tac rhythm --> embryocardia

A condition in which the cadence of the heart sounds resembles that of the foetus, the first and second sounds becoming alike and evenly spaced; a sign of serious myocardial disease.

Synonym: pendulum rhythm, tic-tac rhythm, tic-tac sounds.

Origin: embryo-_ G. Kardia, heart