title: Evidence of carotid atherosclerosis in orthopantomograms and the risk for future cardiovascular events.
abstract: BACKGROUND
  Evidence of carotid atherosclerosis can be detected in 3 to 5% of orthopantomogram (OPG) investigations. The clinical impact of these findings is unknown. We investigated the association of OPG findings of carotid atherosclerosis with the occurrence of future cardiovascular adverse events.
  
  
  METHODS
  We randomly selected 411 of 1268 participants with pre-existent cardiovascular disease from the prospective Inflammation in Carotid Arteries Risk for Arthrosclerosis Study (ICARAS) and assessed their OPGs for the presence of calcified atherosclerotic lesions or indirect signs of atherosclerosis, such as surgical clips or intravascular stents. The degree of carotid stenosis was measured by duplex ultrasound investigations. Patients were then followed for median 39 months (interquartile range 33 to 44 months) for the occurrence of major adverse cardiovascular events (MACE) including myocardial infarction, coronary revascularisation, stroke and death.
  
  
  RESULTS
  We found no statistically significant association between the presence of carotid atherosclerosis detected on OPGs and the presence of a significant carotid stenosis (left carotid artery kappa=0.08; right carotid artery kappa=0.12), or the degree of carotid stenosis (P=0.20). Furthermore, the presence of OPG signs of carotid atherosclerosis was not statistically significant associated with future MACE (adjusted hazard ratio 0.92, 95% confidence interval 0.59 to 1.42; P=0.70).
  
  
  CONCLUSIONS
  Evidence of carotid plaque revealed by OPGs in patients with previously known cardiovascular disease is no useful prognostic marker for MACE. Detection of carotid atherosclerosis by OPGs in these patients therefore has no clinical consequence.
authors.affiliation: General Hospital Vienna, Internal Medicine II/Angiology, Medical University Vienna, Vienna, Austria. matthias.hoke@meduniwien.ac.at
authors.forename: M
authors.initials: M
authors.lastname: Hoke
authors.forename: B
authors.initials: B
authors.lastname: Schmidt
authors.forename: T
authors.initials: T
authors.lastname: Schillinger
authors.forename: W
authors.initials: W
authors.lastname: Kluger
authors.forename: F
authors.initials: F
authors.lastname: Wiesbauer
authors.forename: W
authors.initials: W
authors.lastname: Mlekusch
authors.forename: E
authors.initials: E
authors.lastname: Minar
authors.forename: M
authors.initials: M
authors.lastname: Schillinger
mesh_terms: D000368:Aged; D001317:Austria; D002318:Cardiovascular Diseases / Q000209:etiology* / Q000401:mortality; D002340:Carotid Artery Diseases / Q000150:complications / Q000000981:diagnostic imaging* / Q000401:mortality; D016893:Carotid Stenosis / Q000150:complications / Q000000981:diagnostic imaging* / Q000401:mortality; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D016016:Proportional Hazards Models; D011446:Prospective Studies; D011862:Radiography, Panoramic; D018570:Risk Assessment; D012307:Risk Factors; D012720:Severity of Illness Index; D013997:Time Factors; D018616:Ultrasonography, Doppler, Duplex