Frog sign is seen in case of –
A. Atrial Fibrillation
B. Atrial flutter
What is the mechanism of Frog Sign?
AVNRT – There is AV dissociation
Canon A waves -occur with AV dissociation result from simultaneous contractions of the atria and ventricles against closed mitral and tricuspid valves
Canon A waves – cause reflux of blood into the neck veins.