41.   Most recently, he focused on mitral valve prolapse, an abnormality that may prevent a heart valve from closing properly.

42.   Procedures in which sheep intestines are used as surgical sutures and pigs are bred to provide heart valves for humans are already considered routine.

43.   Polyurethanes are now found in thousands of products like skateboard wheels, varnishes, heart valves and building insulation.

44.   Rep. Jim McDermott had major open-heart surgery Wednesday to repair a congenital flaw in a heart valve.

45.   Q. At present, humans receive heart valves from pigs.

46.   Singletary said he dropped out of an HMO after, he said, his primary doctor delayed a referral to a specialist and misdiagnosed an infected heart valve.

47.   Similar legislation enacted by both chambers would limit liability for damages caused by faulty products as varied as poorly designed heart valves and malfunctioning toasters.

48.   Strep throat must be treated with an antibiotic to prevent damage to the heart valves and kidneys.

49.   Sulzermedica products include heart valves and knee joints.

50.   That Hearn had surgery to replace a faulty heart valve just two months ago adds to the risks, and the concerns.