Pathologic Function
atrial standstill
a·tri·al stand·still
Definitions related to atrial standstill:
  • (sinus arrest/pause) An electrocardiographic finding in which a failure of impulse formation or conduction in the sinus node produces prolongation of the P-P interval or dropped P waves. The threshold for the prolongation of the P-P interval is not well defined.
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • Atrial standstill or silent atrium is a rare condition presenting with the absence of electrical and mechanical activity in the atria. It presents with the absence of P waves, bradycardia, and wide QRS complex in the electrocardiogram.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
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