Friday March 10, 2006
Q: What is Frog sign?
A: In Paroxysmal Supra-Ventricular Tachycardia (PSVT) a rapid and regular bulging seen in the neck. These are actually prominent jugular venous A waves due to atrial contraction against the closed tricuspid valve, and termed as "frog sign".
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2. Evaluation of Patients with Palpitations - NEJM, May, 1998, Volume 338:1369-1373