To say “terreno resbaladizo” for “slippery slope” is commonly used in South American countries (I grew up in Argentina).
So, if I were to interpret/translate Michelle’s quote above, that would be:
“Si no pone cuidado con el control de su alta presión, ésto puede llegar a provocar terreno resbaladizo para otras complicaciones médicas”.
And, of course, Claudia’s explanation should get the idea across just as effectively.