In our article we inform about complete preoperative preparation and about required examinations before the scheduled cardiosurgical procedure. Important part of the preoperative preparation is also detailed instruction about the character of the operation, a way of its realization and about the operation risks. In the end of this article we discus the instruction of the patient about the types of the valvular prosthesis.

        Key words: preoperative examinations, anamnesis, instruction the patient, the types of the valvular prosthesis.