Combination of a medical introducer and a cardiac valve placement catheter, comprising: a placement catheter (54) having a distal balloon (52), the placement catheter (54) comprising a catheter tube (160) and being the balloon (52) disposed on the end of a deflectable part (121) of the catheter tube (160) actuated by a diversion traction wire (202), including the positioning catheter (54) in addition to a tubular valve pusher ( 158) which slides over the catheter tube (160) and moves longitudinally with respect to the balloon (52)； and an introducer (100) with an oblong tubular sheath (70) extending distally from a proximal housing (102) containing at least one introducer valve (106, 108, 112) for a fluid tight seal around the placement catheter (54), characterized in that the positioning catheter (54) further includes a proximal control handle (150) on which both a deflection actuator (154) are mounted to deflect the deflectable part (212) of the tube catheter (160) as a pusher actuator (156) for longitudinally displacing the valve pusher (158) with respect to the balloon (52), the handle (150) enabling one-handed operation of both the deflection of the deflectable part (212) of the catheter tube (160) as the longitudinal displacement of the valve pusher (158).Combinación de un introductor médico y un catéter de colocación de válvula cardíaca, que comprende: un catéter de colocación (54) que tiene un balón distal (52), comprendiendo el catéter de colocación (54) un tubo de catéter (160) y estando dispuesto el balón (52) sobre el extremo de una parte desviable (121) del tubo de catéter (160) accionada por un alambre de tracción de desviación (202), incluyendo el catéter de colocación (54) además un empujador de válvula tubular (158) que se desliza sobre el tubo de catéter (160) y se mueve longitudinalmente con respecto al balón (52)； y un introductor (100) con una vaina tubular oblonga (70) que se extiende de forma distal desde un alojamiento proximal (102) que cont
