<prompt> Which of the following statement is false regarding subclan steal syndrome ?Most commonly stenosed vessel is Left Subclan aery .Reversal of blood flow in the contralateral veebral aery .Reversal is to compensate for a proximal stenosis of Subclan aery .Majority cases are asymptomatic .  <response>: Most commonly involved Vessel - Left SCA Right SCA Reversal in the blood flow in the ipsilateral veebral aery to compensate for a proximal stenosis of SCA . Majority of cases are asymptomatic but severe stenosis can lead to Transient veebrobasilar ischemia . 