The present invention relates to an assembly for replacing a heart valve or coronary angioplasty assembly, including an insertion sheath (13) of an introducer (1) or a delivery catheter (1′), which is smaller in size than an introducer, intended for being inserted into an artery of a human body. The invention essentially involves integrating the metal substrate of an electrode of the cardiac stimulator directly into the sheath for insertion into the artery of a patient.
