atrial standstill


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a·tri·al stand·'still

cessation of atrial contractions, marked by absence of atrial waves in the electrocardiogram.

atrial standstill

A transient or permanent electrical atrial failure—and non-contractility of atria—which is seen in patients with familial amyloidosis and facioscapulohumeral dystrophy, possibly due to perineural infiltration.

EKG
Absent P waves.

JVP
Absent A waves.

Molecular pathology
Congenital atrial standstill is linked to a mutation of SCN5A, which encodes a voltage-gated sodium channel.

a·tri·al stand·still

(ā'trē-ăl stand'stil)
Cessation of atrial contractions, marked by absence of atrial waves in the electrocardiogram.