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Sinoatrial node dysfunction

Definition: A derangement in the normal functioning of the sinoatrial node. Typically, SA node dysfunction is manifest as sinoatrial exit block or sinus arrest, but may present as an absolute or relative bradycardia in the presence of a stressor. It may be associated with bradycardia-tachycardia syndrome. (NCI)

Synonyms (terms occurring on more labels are shown first): sinus node dysfunction

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