<prompt> Nicoldoni sign is also known as:Murray signFrei signDarner signBranham sign  <response>: Branham sign Nicoladoni sign or Branham sign Pressure on the aery proximal to an A-V fistula causes the swelling to diminish in size, a thrill or bruit to cease, the pulse rate to fall and the pulse pressure return to normal. Aeriovenous fistula AVF AVF may be congenital or acquired by trauma of a penetrating wound, or surgically created for renal dialysis Structural effect on veins Veins are aerialised, they become dilated touous and thick walled. Physiological effects of fistula ? Increased pulse pressure Increased systolic decreased diastolic Enhanced venous return result in Increased HR and Increased CO. Left ventricular enlargement and later cardiac failure may occur A congenital .fistula in the young may cause overgrowth of limb. In the leg, indolent ulcers may result from relative ischemia below the sho circuit. Clinical signs A pulsatile swelling A thrill on palpation Continuous bruit on auscultation Nicoladoni sign or Branham sign Pressure on the aery proximal to fistula causes the swelling to diminish in size, a thrill or bruit to cease, the pulse rate to. fall and the pulse pressure return to normal. 