(Top) Self-expandable proprietary stent that approximates the shape of the aortic root and sinuses (blue arrows), and the nonexpandable posts (black arrow) that support the pericardial tissue valve. It has a double pericardial sheet that enhances sealing against the native valve (large down-pointing purple/grey arrow) to decrease paravalvular leaks. Note: Large vertical up-pointing arrow signifies direction of blood flow. (Bottom) Valve viewed from the aortic surface with probes through patent coronary ostia (white arrows). cor. = coronaria; dx = dextra (right coronary artery); PHV = percutaneous heart valve; sx = sinestra (left coronary artery).