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2. Transcatheter aortic valve replacement - Wikipedia

   en.wikipedia.org/wiki/Transcatheter_aortic_valve...

   The valve is repositionable before release to ensure accurate placement helping to improve patient outcomes. [12] Edwards' Sapien aortic valve is made from bovine pericardial tissue and is implanted via a catheter-based delivery system. It is approved by the FDA for use in the US. [10] [11] [12]

3. Mitral valve repair - Wikipedia

   en.wikipedia.org/wiki/Mitral_valve_repair

   As early as January 2000 a team of doctors [8] at the Instituto de Cardiología y Cirugía Cardiovascular in La Habana, Cuba have performed beating heart mitral valve repair or replacement. The beating heart mitral valve replacement technique is as safe as the arrested heart technique, and is the recommended alternative to arrested heart ...

4. High-voltage direct current - Wikipedia

   en.wikipedia.org/wiki/High-voltage_direct_current

   Long distance HVDC lines carrying hydroelectricity from Canada's Nelson River to this converter station where it is converted to AC for use in southern Manitoba's grid. A high-voltage direct current (HVDC) electric power transmission system uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems. [1]

5. Chevrolet big-block engine - Wikipedia

   en.wikipedia.org/wiki/Chevrolet_big-block_engine

   The engine block had 4.84-inch (123 mm) bore centers, two-bolt main bearing caps, a "side oiling" lubrication system (the main oil gallery located low on the driver's side of the crankcase), with full-flow oil filter, and interchangeable cylinder heads. Heads used on the high performance 409 and 427 engines had larger ports and valves than ...

6. Mercury-arc valve - Wikipedia

   en.wikipedia.org/wiki/Mercury-arc_valve

   Mercury rectifier on display in the Beromünster AM transmitter in Switzerland, before being decommissioned.Three-phase full-wave rectifier with six anodes. A mercury-arc valve or mercury-vapor rectifier or (UK) mercury-arc rectifier [1] [2] is a type of electrical rectifier used for converting high-voltage or high-current alternating current (AC) into direct current (DC).

7. Downhole safety valve - Wikipedia

   en.wikipedia.org/wiki/Downhole_safety_valve

   The full name for this most common type of downhole safety valve is a Tubing Retrievable Surface Controlled Sub-Surface Valve, shortened in completion diagrams to TRSCSSV. If a tubing retrievable valve fails, rather than go to the expense of a workover, a "wireline retrievable" valve may be used instead.