Research and development of implantable artificial cardiac valves; research and development of medical apparatus and instruments for use in percutaneous and endovascular procedures in the cardiac field; research and development of medical devices consisting of delivery system for artificial cardiac valves; research and development of instruments for use in cardiovascular procedures; research and development of medical apparatus and instruments for treating cardiovascular disease; research and development of cardiac valves for surgical prostheses; research and development of prostheses for cardiovascular systems, namely, for the heart and heart valves; research and development of artificial cardiac valves for implantation as part of the cardiovascular system; research and development of percutaneous valves comprised of artificial materials for implantation as part of the cardiovascular system; research and development of valve implants consisting of artificial materials for implementation as part of the cardiovascular system; research and development of prosthetic and bioprosthetic heart valves; research and development of heart valve prostheses