BACKGROUND Millions of patients present annually with chest pain, but only 10% to 15% have myocardial infarction. Lack of diagnostic sensitivity and specificity of clinical and conventional markers prevents or delays treatment and leads to unnecessary costly admissions. Comparative data are lacking on the new markers, yet using all of them is inappropriate and expensive. METHODS AND RESULTS T...

Dr. Januzzi and colleagues in a recent study (1) published in the Journal suggest replacement of creatine kinase-MB fraction (CKMB) with serum troponin testing for postoperative evaluation of the cardiac surgical patient. An important point to remember is the release pattern of these markers. Although the rise (CK-MB 4 to 8 h; CK-MB isoform 2 to 6 h; cardiac troponin I [cTnI] 4 to 6 h; cardiac ...

Background—Millions of patients present annually with chest pain, but only 10% to 15% have myocardial infarction. Lack of diagnostic sensitivity and specificity of clinical and conventional markers prevents or delays treatment and leads to unnecessary costly admissions. Comparative data are lacking on the new markers, yet using all of them is inappropriate and expensive. Methods and Results—The...

Dr. Januzzi and colleagues in a recent study (1) published in the Journal suggest replacement of creatine kinase-MB fraction (CKMB) with serum troponin testing for postoperative evaluation of the cardiac surgical patient. An important point to remember is the release pattern of these markers. Although the rise (CK-MB 4 to 8 h; CK-MB isoform 2 to 6 h; cardiac troponin I [cTnI] 4 to 6 h; cardiac ...

This article describes the sensitivity and specificity of troponin I when compared to creatine kinase-MB (CK-MB) and electrocardiography (ECG) for diagnosing acute myocardial infarction (AMI). Two different lower levels for defining positive results with troponin I were evaluated. A retrospective study of 153 patients who presented to the emergency department of a community hospital supplied th...

We studied the effect of prostate resection on serum creatine kinase (EC 2.7.3.2) and lactate dehydrogenase (EC 1.1.1.27) isoenzymes in 22 patients. Two hours after their operations, two-thirds of these patients had increased total creatine kinase activity. The MB isoenzyme was demonstrated in sera of 66% of the patients and the BB isoenzyme in 76%. MB content varied from 1 to 7% of total creat...

BACKGROUND & OBJECTIVES Exercise results in oxidative enzyme increase and micro-injuries in skeletal muscles. The aim of this study was to investigate the effect of maximal aerobic exercise on serum muscle enzymes in professional field hockey players. This study aims to determine the effect of increasing maximal aerobic exercise on creatine kinase (CK), creatine kinase-MB (CK-MB), aspartate ami...

Gilts, barrows and boars of Pietrain (P), Yorkshire (Y) and P-Y-Hampshire (H) breeding, Px P (PHY), were used to study accuracy of prediction of susceptibility to the porcine stress syndrome (PSS) by the luciferase method for blood creatine kinase (CK). At 10 weeks of age, pigs were classified as PSS if they displayed muscle rigidity within 5 min after commencing anesthesia with 3% halothane in...

The effect of gastrointestinal surgery on serum creatine kinase activity was studied in 30 patients. The MB isoenzyme was demonstrated in sera of 30% of the patients and BB isoenzyme in 23%. MB content varied from 0.8 to 10.3% of the total creatine kinase activity, and the BB content from 0.6 to 18.4%. The CK-BB was probably of gastrointestinal origin, since gastrointestinal tract contains high...