31.   Preliminary studies on animals suggest that the transplanted muscle tissue may repair damaged heart muscle and strengthen heart contractions.

32.   After successful surgery to repair the damaged heart valve, the Inter Milan star has returned to competitive action this season but so far played few matches.

33.   Being active is good for damaged hearts.

34.   But the hospital refused to reveal the actual test results or say when Cheney will have additional exams important in measuring how well his damaged heart functions.

35.   Challenging decades of medical dogma, researchers have discovered that damaged hearts can repair themselves by growing brand-new muscle cells.

36.   During the surgery doctors determined that repair to the damaged heart valve was too difficult and decided to repair the leaking valve with pig tissue.

37.   Government agencies eventually gathered several hundred cases of damaged heart valves among people taking phen-fen and Redux.

38.   So in a damaged heart, they could form new scar tissue.

39.   The long-held belief that damaged heart tissue can never recover may be wrong.

40.   The bypass surgery is aimed at enabling blood to circumvent an arterial blockage, but is unlikely to result in any improvement to damaged heart muscles.