  We consider heavy quark and antiquark off-shell spinorial currents with
emission of an arbitrary number of gluons of positive helicity. From this
results we calculate the corresponding on-shell scattering amplitude and the
quark-antiquark vector current. Then, we show that in the heavy top quark
effective theory the holomorfic component of the Higgs $\to q \bar{q} +
n$-gluon amplitude vanish for helicity conserving configurations.
