title: Serum cholesterol concentration before and after streptokinase in acute myocardial infarction.
abstract: OBJECTIVE
  To determine if serum cholesterol concentration should be measured before or after streptokinase therapy within the first 24 h of myocardial infarction.
  
  
  METHODS
  Prospective study of patients receiving streptokinase therapy for acute myocardial infarction (AMI).
  
  
  METHODS
  Coronary care unit of a district general hospital.
  
  
  METHODS
  Thirty-one patients (26 men aged 38-74 years, mean 60 years) admitted with a definite diagnosis of myocardial infarction.
  
  
  METHODS
  Streptokinase therapy given intravenously at a mean of 5 h (range 1.5-15 h) after the onset of chest pain.
  
  
  METHODS
  Serum cholesterol concentration just prior to, and 11.5 h (range 4-20.5 h) after streptokinase administration.
  
  
  RESULTS
  There was a significant mean fall of 0.4 mmol l-1 (P = 0.002, 95% CI = 0.2-0.6) in serum cholesterol concentration from a pre-streptokinase concentration of 7.0 (range 5.3-9.9) to a post-streptokinase concentration of 6.6 (range 4.9-9.9). In the patients who showed a fall in cholesterol concentration, the magnitude of fall correlated with the baseline cholesterol concentration (r = 0.66, P < 0.01) but not with peak cardiac enzyme activities (r = 0.05, P > 0.2 for aspartate aminotransferase; r = 0.10, P > 0.2 for lactate dehydrogenase), time from onset of chest pain to post-streptokinase measurement (r = 0.27, P > 0.2) or time from streptokinase administration to post-streptokinase measurement (r = 0.01, P > 0.2).
  
  
  CONCLUSIONS
  Serum cholesterol concentration may be underestimated when measured after streptokinase therapy, particularly when the true basal value is high. Further management of this risk factor may be based more accurately on its measurement before than after streptokinase therapy within the first 24 h of AMI.
authors.affiliation: Department of Medicine, Frimley Park Hospital, Surrey, UK.
authors.forename: T P
authors.initials: TP
authors.lastname: Chua
authors.forename: I D
authors.initials: ID
authors.lastname: Fry
authors.forename: R J
authors.initials: RJ
authors.lastname: Frankel
authors.forename: R
authors.initials: R
authors.lastname: Lim
mesh_terms: D000328:Adult; D000368:Aged; D002784:Cholesterol / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood* / Q000188:drug therapy; D011446:Prospective Studies; D013300:Streptokinase / Q000627:therapeutic use*; D013997:Time Factors
chemical_list: D002784:Cholesterol; D013300:Streptokinase