▁decrease ▁blood ▁cl ot ting ▁in ▁order ▁to ▁reduce ▁the ▁risk ▁of ▁stroke . ▁ ▁Ep ide mi ology ▁ ▁Short ▁Q T ▁synd rome ▁is ▁a ▁very ▁rare ▁condition ▁with , ▁as ▁of ▁ 2 0 1 8 , ▁fewer ▁than ▁ 3 0 0 ▁cases ▁described ▁in ▁the ▁medical ▁literature . ▁As ▁a ▁gen etic ▁synd rome , ▁those ▁affected ▁are ▁born ▁with ▁the ▁condition . ▁Sym pt oms ▁can ▁occur ▁in ▁new born s , ▁potentially ▁present ing ▁as ▁sudden ▁infant ▁death ▁synd rome . ▁M ales ▁and ▁females ▁are ▁equally ▁likely ▁to ▁be ▁affected , ▁and ▁have ▁a ▁similar ▁risk ▁of ▁sudden ▁card iac ▁death . ▁ ▁Pro gn osis ▁ ▁The ▁r ar ity ▁of ▁short ▁Q T ▁synd rome ▁makes ▁calculating ▁pro gn osis ▁accur ately ▁difficult . ▁The ▁risk ▁of ▁sudden ▁card iac ▁death ▁has ▁been ▁estimated ▁at ▁ 0 . 8 % ▁per ▁year , ▁leading ▁to ▁a ▁cum ulative ▁risk ▁of ▁sudden ▁card iac ▁death ▁of ▁ 4 1 % ▁by ▁the ▁age ▁of ▁ 4 0 . ▁A ▁previous ▁history ▁of ▁card iac ▁arrest ▁predict s ▁a ▁higher ▁lik elihood ▁of ▁further ▁dangerous ▁arr h yth mi as . ▁Some ▁have ▁suggested ▁that ▁those ▁with ▁the ▁short est ▁Q T ▁intervals ▁may ▁have ▁a ▁higher ▁risk ▁of ▁arr h yth mi as , ▁but ▁this ▁view ▁has ▁not ▁been ▁supported ▁by ▁all . ▁The ▁find ings ▁from ▁invas ive ▁electro phys i ological ▁studies ▁do ▁not ▁predict ▁an ▁individual ▁with ▁short ▁Q T