<prompt> Highest mortality in pregnancyFallots tetrologvCoarctation of aortaMarfans syndromeEisenmenger syndrome  <response>: Eisenmenger syndromeThese patients have pulmonary hypertension with shunt right to left through an open ductus or ASD or VSD.Maternal mortality is high i.e. 50 so is a perinatal loss 50.Fallots tetralogy, coarctaion of aorta Marfans syndrome hav mortality rate of 5-10, 3-9 25 respectively 