Atrial dissociation


atrial dissociation

atrial dissociation n.
independent beating of the two atria or of parts of the atria.

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    atrial extrasystole atrial extrasystole n. a premature contraction of the heart arising from an ectopic atrial focus.

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    atrial fibrillation atrial fibrillation n. fibrillation in which the normal rhythmical contractions of the cardiac atria are replaced by rapid irregular twitchings of the muscular wall that cause the ventricles to respond irregularly. also called auricular fibrillation.

  • Atrial flutter

    atrial flutter atrial flutter n. rapid regular atrial contractions occurring usually at rates between 250 and 400 per minute and often producing saw-tooth waves in an electrocardiogram. also called auricular flutter.

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    any of several peptide hormones that are released by the atria of the heart in response to an abnormal increase in blood volume and that modulate blood pressure and the excretion of sodium, pot-ssium, and water. abbreviation: anf. atrial natriuretic factor n. a peptide hormone released from cardiac atrial tissue that causes increased elimination of […]


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