21.   These proteins are found in the blood only after damage to heart tissue has occurred.

22.   This is the first time, Orlic said, that new heart tissue has been generated from injected cells.

23.   Two needed to have their chests opened to repair heart tissue and one suffered bleeding from a vein.

24.   Cyanide was found in the heart tissue of three of the aborted fetuses.

25.   Margulies said the heart tissue probably rebounded because the pump, called a left ventricular assist device, or LVAD, gave the heart a rest.

26.   Scharf thought she had the flu, but doctors at Lahey Clinic in Burlington later diagnosed a condition called viral myocarditis, an inflammation of heart muscle tissue.

27.   Several weeks into the investigation, scientists found cyanide in the heart tissue of three fetuses.

28.   The condition can be treated with drugs, electrical shock and even burning of part of the heart tissue.

29.   The cage was meant to prevent heart tissue from obstructing blood flow into the replacement heart.

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