Mitral valve replacement using a porcine xenograft for treatment of IHSS--A case report.

Recently we treated a 24-year-old female IHSS patient by mitral valve replacement, using a porcine xenograft valve. Following surgery, clinical manifestations improved markedly and postoperative cardiac catheterization revealed that the pressure gradient between left ventricle and aorta had dropped to a minimum compared with the pre-operative value of 104 mmHg and end-diastolic pressure of the left ventricle had returned to normal level.