http://medicalxpress.com/ en-us Medical Xpress internet news portal provides the latest news on Health and Medicine. Every year, over 300,000 heart valve replacement operations are performed worldwide. Diseased valves are often replaced with mechanical heart valves (MHVs), which cannot yet be designed to suit each patient's specific needs. Complications such as blood clots can occur, which can require patients to take blood-thinning medication. http://medicalxpress.com/news/2012-12-simulations-blood-mechanical-heart-valves.html Cardiology Wed, 19 Dec 2012 09:34:54 EST news275132085