If you have rheumatic heart disease, high blood pressure, or diabetes, or take digitalis drugs, vitamin E can be harmful.
only certain people can have heart disease.
( z1 possible :ARG1 ( z2 suffer :ARG0 ( z3 person :mod ( z4 certain ) :mod ( z5 only ) ) :ARG1 ( z6 disease :mod ( z7 heart ) ) ) )