Plasma and urinary levels of heart fatty acid-binding protein in patients undergoing cardiac surgery.
To evaluate the clinical significance of the plasma and urinary levels of heart fatty acid-binding protein (H-FABP) in patients undergoing cardiac surgery, a prospective study was conducted. Ten patients undergoing coronary artery bypass grafting were enrolled. Blood samples for determination of plasma H-FABP (pH-FABP), the MB isoenzyme of creatine kinase (CK-MB) and troponin-T (TnT), and urine samples for determination of urinary H-FABP (uH-FABP) were collected serially. None of the patients had perioperative myocardial infarction. The time to reach the peak level after aortic declamping was significantly (p<0.05) shorter for pH-FABP (1.4+/-0.5 h) than for CK-MB (2.5+/-0.5 h), TnT (6.6+/-1.3 h) or uH-FABP (3.0+/-0.6 h). Peak levels of pH-FABP correlated with those of CK-MB (r = 0.51, p = 0.04), TnT (r = 0.60, p = 0.03) and uH-FABP (r = 0.61, p = 0.03), and peak levels of uH-FABP correlated with CK-MB (r = 0.57, p = 0.04). Postoperative uH-FABP levels correlated inversely with the left ventricular stroke work index (r = -0.63, p = 0.04). This study demonstrated that H-FABP appears rapidly in plasma after reperfusion and reaches its peak earlier than other available biochemical markers; it appears also in urine and the levels correlated with cardiac function. Plasma and urinary H-FABP may be an early and sensitive biochemical marker for the diagnosis of myocardial injury in patients undergoing cardiac surgery.
Hayashida
N
N
Department of Surgery, Kurume University, Fukuoka, Japan.
Chihara
S
S
Akasu
K
K
Oda
T
T
Tayama
E
E
Kai
E
E
Kawara
T
T
Aoyagi
S
S
D001794:Blood Pressure; D002352:Carrier Proteins / Q000097:blood* / Q000652:urine*; D001026:Coronary Artery Bypass; D003402:Creatine Kinase / Q000097:blood; D000071438:Fatty Acid-Binding Protein 7; D050556:Fatty Acid-Binding Proteins; D006801:Humans; D007527:Isoenzymes; D018996:Myelin P2 Protein / Q000097:blood* / Q000652:urine*; D009206:Myocardium / Q000378:metabolism*; D009363:Neoplasm Proteins; D011446:Prospective Studies; D012044:Regression Analysis; D016896:Treatment Outcome; D020107:Troponin T / Q000097:blood; D025521:Tumor Suppressor Proteins; D016277:Ventricular Function, Left
D002352:Carrier Proteins; C107608:FABP7 protein, human; D000071438:Fatty Acid-Binding Protein 7; D050556:Fatty Acid-Binding Proteins; D007527:Isoenzymes; D018996:Myelin P2 Protein; D009363:Neoplasm Proteins; D020107:Troponin T; D025521:Tumor Suppressor Proteins; D003402:Creatine Kinase