▁is ▁a ▁ped iat ric ▁heart ▁operation ▁used ▁to ▁by pass ▁the ▁left ▁vent ric ular ▁out flow ▁tract ▁( L V OT ) ▁that ▁comb ines ▁the ▁a ort ic ▁repair ▁of ▁the ▁Nor wood ▁procedure ▁and ▁a ▁sh unt ▁similar ▁to ▁that ▁used ▁in ▁the ▁R ast elli ▁procedure ▁in ▁a ▁single ▁operation . ▁It ▁is ▁used ▁to ▁repair ▁defect s ▁that ▁result ▁in ▁the ▁phys i ology ▁of ▁hyp op last ic ▁left ▁heart ▁synd rome ▁even ▁though ▁both ▁vent ric les ▁are ▁function ing ▁normally . ▁These ▁defect s ▁are ▁common ▁in ▁Di Ge orge ▁synd rome ▁and ▁include ▁interrupted ▁a ort ic ▁arch ▁and ▁L V OT ▁obst ruction ▁( I AA / L V OT O ); ▁a ort ic ▁at res ia - se vere ▁st en osis ▁with ▁vent ric ular ▁sept al ▁defect ▁( AA / V SD ); ▁and ▁a ort ic ▁at res ia ▁with ▁interrupted ▁a ort ic ▁arch ▁and ▁a ort op ul mon ary ▁window . ▁This ▁procedure ▁allows ▁the ▁sur geon ▁to ▁keep ▁the ▁left ▁vent ric le ▁connected ▁to ▁the ▁system ic ▁circul ation ▁while ▁using ▁the ▁pul mon ary ▁val ve ▁as ▁its ▁out flow ▁val ve , ▁by ▁connecting ▁them ▁through ▁the ▁vent ric ular ▁sept al ▁defect . ▁The ▁Y as ui ▁procedure ▁includes ▁a ▁modified ▁Dam us – K aye – St ans el ▁procedure ▁to ▁connect ▁the ▁a ort ic ▁and ▁pul mon ary ▁roots , ▁allowing ▁the ▁coron ary ▁ar ter