title: [Troponin T during cardiopulmonary bypass].
abstract: OBJECTIVE
  To evaluate the effect of cardiopulmonary bypass (CPB) on myocardial troponin T and its clinical significance and relationship to myocardial cell injury.
  
  
  METHODS
  Thirty-seven patients underwent open heart surgery under CPB. The procedures included correction of congenital heart disease in 15 patients, valve replacement in 15, and coronary artery bypass grafting in 7. Blood samples were taken at four different time intervals for assessing a troponin T. Correlative factors including duration of clamping of aorta, dosage of cardioplegic solution, and metabolic acidosis were studied.
  
  
  RESULTS
  When clamping time > 60 minutes, dosage of cardioplegia solution < 10 ml/kg and existing metabolic acidosis, the level of troponin T was significantly increased (P < 0.01).
  
  
  CONCLUSIONS
  The elevation of troponin T is closely related to cardiopulmonary bypass, especially the duration of clamping of aorta, insufficiency of cardioplegia, and metabolic acidosis.
authors.affiliation: Qingdao Institute of Cardiovascular Suregery, Qingdao 266100, China.
authors.forename: D
authors.initials: D
authors.lastname: Zhang
authors.forename: S
authors.initials: S
authors.lastname: Jin
authors.forename: S
authors.initials: S
authors.lastname: Wei
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: B
authors.initials: B
authors.lastname: Sun
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D006348:Cardiac Surgical Procedures; D002315:Cardiopulmonary Bypass; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007432:Intraoperative Period; D008297:Male; D008875:Middle Aged; D009206:Myocardium / Q000378:metabolism* / Q000473:pathology; D020107:Troponin T / Q000378:metabolism*
chemical_list: D020107:Troponin T