<prompt> False elevation of ABPI is seen in:DVTAcute limb ischemiaChronic Venous insufficiencyCalcified vessel walls  <response>: Ref. Sabiston Textbook of Surgery. Pg. 497 The ankle-brachial pressure index ABPI is the ratio of systolic pressure at the ankle to that in the arm .The higher of the pressures in the dorsalis pedis and the posterior tibial arteries serves as the numerator ,with the higher systolic pressures between the brachialis serving as the denominator .Resting ABPI is normally about 1 ,0.9 indicated some degree of arterial obstruction0.3 suggests imminent necrosis Artefacts are due especially due to calcified arteries, which are often incompressible and lead to a falsely high pressure or ABPI result ,especially in diabetics. 