FIELD: medicine, cardiology. SUBSTANCE: invention relates to prosthesis of cardiac valves. After enzymatic treatment and washing out biotissue for xenoprosthesis is placed in 0.10-0.15% and 0.25-0.35% solution of glutaric aldehyde in borate buffer at 5-25 C and valve is placed in the more saturated solution which is changed three times followed by sterilization. EFFECT: accelerated preparing biotissue for xenoprosthesis, decreased consumption of reagents, retained quality of biotissue treatment. 1 cl
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