Nicoladoni Branham's sign is seen in: March 2005

Ans. B: Aeriovenous fistula Nicoladoni sign/Branham sign/Nicoladoni-Israel-Branham sign, is the slowing of the hea rate in response to (manual) compression of an aeriovenous fistula. Aeriovenous fistula may be either congenital or acquired. The structural effect of aerial blood flow on the veins is characteristic; they become dilated, touous and thick walled (aerialized) The physiological effect is that it can increase cardiac output, if big enough. Auscultation reveals a machinery murmur.