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2. Valve oil - Wikipedia

   en.wikipedia.org/wiki/Valve_oil

   There are two main valve types on brass instruments: piston and rotor. Accordingly, vendors sell different types of oil, including scented varieties. Some vendors recommend up to three different types of oil for some valve types. Slide oil for trombones is also a very similar solution. The difference between oil types is primarily the viscosity ...

3. Perodua Viva - Wikipedia

   en.wikipedia.org/wiki/Perodua_Viva

   The Perodua Viva is a city car manufactured by Malaysian automaker Perodua since 10 May 2007. At launch, Perodua marketed the Viva as a Kelisa replacement only. Later in the Viva's life, with the introduction of the 660 BX variant, the Viva finally replaced the Kancil.

4. Aortic valve replacement - Wikipedia

   en.wikipedia.org/wiki/Aortic_valve_replacement

   Aortic valve replacement is a cardiac surgery procedure whereby a failing aortic valve is replaced with an artificial heart valve. The aortic valve may need to be replaced because of aortic regurgitation (back flow), or if the valve is narrowed by stenosis .

5. Artificial heart valve - Wikipedia

   en.wikipedia.org/wiki/Artificial_heart_valve

   An artificial heart valve is a one-way valve implanted into a person's heart to replace a heart valve that is not functioning properly (valvular heart disease). Artificial heart valves can be separated into three broad classes: mechanical heart valves, bioprosthetic tissue valves and engineered tissue valves.

6. Aortic valve - Wikipedia

   en.wikipedia.org/wiki/Aortic_valve

   Homograft valves are donated by patients and recovered after the patient expires. The durability of homograft valves is probably the same as for porcine tissue valves. Another procedure for aortic valve replacement is the Ross procedure (after Donald Ross) or pulmonary autograft. The Ross procedure involves going to surgery to have the aortic ...

7. Ross procedure - Wikipedia

   en.wikipedia.org/wiki/Ross_procedure

   Diagram of the human heart. Several adaptations of the Ross procedure have evolved, but the principle is essentially the same; to replace a diseased aortic valve with the person's own pulmonary valve (autograft), and replace the person's own pulmonary valve with a pulmonary valve from a cadaver (homograft) or a stentless xenograft.