ON THE CORRECTIONS TO POLE DOMINANCE IN B-]PI-L-NU

In the framework combining the heavy quark expansion and chiral symmet ry for light quarks, we identify a class of corrections to the dominan t vector meson pole diagram for B --> pi/nu, in the vicinity of the ze ro pion recoil point. We also give a qualitative estimate of these eff ects, using higher states exchanges with couplings constrained by curr ent algebra and PCAC.