  We study the electroweak interactions within the standard electroweak theory
in the case where the Higgs particle is heavy, namely, $M_H \leq 1\;TeV$. By
integrating out the Higgs boson to one loop we find the complete effective
lagrangian, called electroweak chiral lagrangian, that is $SU(2)_L\times
U(1)_Y$ invariant and contains the whole set of operators up to dimension four.
The values of the chiral parameters representing the non-decoupling effects of
the heavy Higgs are presented. Some examples have been chosen to show the
applicability of this effective lagrangian approach to compute
phenomenologically relevant quantities that either are being meassured at
present or will be meassured in future experiments.
