Low Pressure Valves for Prosthetic Hearts

Prosthetic heart valve with modified structure to reduce pressure drop across the valve. The valve has a support frame with undulating inflow cusps and outflow commissure posts that angle outward to widen the outflow orifice. The flexible leaflets attach to the cusps and coapt in the middle. When the valve opens, the leaflets spread outward to provide an outflow orifice area at least as large as the maximum flow orifice area. This prevents flow restriction. The angled commissures provide a larger exit orifice than entrance orifice to induce laminar flow and reduce pressure drop.

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An artificial heart valve leaflet and heart valve prosthesis that can fully close to avoid regurgitation and prevent large pressure differences compared to existing heart valves. The artificial leaflet has overlapping main body and closed walls that allow complete closure when the valve is closed. This prevents blood reflux and reduces pressure differences compared to incomplete closure. The overlapping walls provide a closed height that stops regurgitation and prevents large transvalvular pressure drops. The leaflet can also automatically reset to the closed position without external force.

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A prosthetic heart valve that improves chamber hemodynamics by injecting fluid into the valve during systole to enhance blood flow. The valve has angularly positioned injectors around the inner wall that strike the wall during systole, creating a vortex effect. This injected fluid accelerates blood flow and reduces the energy required for transport. The valve also has tether lines to secure it during diastole but allow movement during systole to accommodate the vortex. The injector angles and fluid volumes are optimized for chamber-specific benefits. The valve can be implanted in native or replaced valves to improve overall chamber performance.

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Prosthetic heart valve design to reduce post-implantation issues like obstruction or gradients in the left ventricular outflow tract (LVOT). The valve has an outer frame with an angled anterior end and a raised atrial halo. The inner valve assembly is positioned closer to the ventricle centerline. This allows the valve to seat in the annulus without obstructing the LVOT. The inner frame can also have compressed posts or offset centerlines. These variations further enhance LVOT clearance.

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A cardiac valve prosthesis designed to overcome the limitations of traditional mechanical and biological valves, particularly in the pulmonary position. The prosthesis has an annulus body with a tapered passage that narrows towards the downstream end. This configuration promotes unidirectional blood flow during systole and diastole, reducing retrograde flow. It also allows the valve to collapse for delivery and expand in situ. The prosthesis can be coated with drugs to prevent thrombosis and pannus growth. The valve can be mounted on expandable stents for anchoring.

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