title: Pulmonary embolism and cardiac enzymes.
abstract: BACKGROUND
  Pulmonary embolism (PE) is often associated with chest pain, electrocardiographic changes, and right ventricular (RV) dysfunction on echocardiogram. There have been reports of elevated troponin levels with PE. RV dysfunction and elevated troponin levels have prognostic implications in acute PE. The purpose of this retrospective analysis was to determine whether PE was associated with elevated cardiac enzymes and whether there was any difference among patients who presented with or without chest pain.
  
  
  METHODS
  Records of 93 consecutive patients with high-probability ventilation/perfusion lung scan results for PE were analyzed for the presence or absence of chest pain on presentation, abnormalities in cardiac enzymes, and evidence of RV dysfunction on echocardiogram.
  
  
  RESULTS
  A total of 56 of 93 patients had cardiac enzymes evaluated; 24 of these 56 patients had chest pains, and 32 did not. Only 1 patient of the 56 had abnormal cardiac enzymes. This patient had a known history of coronary artery disease (CAD) and had experienced an acute anterior myocardial infarction. Echocardiograms were performed in 36 of 93 patients. Evidence of RV dysfunction on echocardiograms was found in 22 of these patients. No significant relationship was found between RV dysfunction and chest pains (P > .10).
  
  
  CONCLUSIONS
  We found no significant relationship between high-probability ventilation/perfusion scan results and abnormalities in cardiac enzymes irrespective of the presence or absence of chest pain. Patients with a history of CAD or RV dysfunction did not have a higher incidence of chest pain when compared with those with no known history of CAD or RV dysfunction.
authors.affiliation: Division of Cardiology, Department of Medicine, East Carolina University Brody School of Medicine, Pitt County Memorial Hospital, Greenville, North Carolina 27858, USA.
authors.forename: Nazim Uddin Azam
authors.initials: NU
authors.lastname: Khan
authors.forename: Assad
authors.initials: A
authors.lastname: Movahed
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002637:Chest Pain / Q000175:diagnosis; D016009:Chi-Square Distribution; D003327:Coronary Disease / Q000175:diagnosis; D003402:Creatine Kinase / Q000097:blood*; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006801:Humans; D007527:Isoenzymes / Q000097:blood; D008297:Male; D008875:Middle Aged; D011655:Pulmonary Embolism / Q000097:blood / Q000175:diagnosis* / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D019210:Troponin I / Q000097:blood; D018497:Ventricular Dysfunction, Right / Q000175:diagnosis
chemical_list: D007527:Isoenzymes; D019210:Troponin I; D003402:Creatine Kinase