title: Safety of performing CT angiography in stroke patients treated with intravenous thrombolysis.
abstract: OBJECTIVE
  Exposure to contrast agents may cause nephrotoxicity. The safety of performing CT angiography without having knowledge of the baseline creatinine level in stroke patients treated with tissue plasminogen activator (tPA) has not been established.
  
  
  METHODS
  This is an observational cohort study, with a historical control group to evaluate the safety of CT angiography performed before tPA treatment given within 3 h of symptom onset. The CT angiography group represents all patients treated with tPA between September/2003 and November/2007 who had CT angiography. The control group consists of all patients treated with tPA between January 1999 and August 2003 when CT angiography was not performed. The primary outcome was a creatinine increase in 24-72 h compared with baseline; the secondary outcome was a creatinine increase by > or = 44 micromol/l in 24-72 h and the incidence of symptomatic intracerebral haemorrhage (sICH).
  
  
  RESULTS
  Baseline parameters between the CT angiography group (164 patients, age 70+/-11; 91 male) and the control group (77 patients, age 67+/-11; 45 male) were similar. In the CT angiography group, the mean creatinine increase was -0.89 mmol/l and in the control group 2.2 mmol/l (p=0.42). A creatinine increase of > or = 44 micromol/l occurred in five patients (3%) in the CT angiography group and in three patients (4%) in the control group (p=0.50). Also, in the CT angiography group, eight patients (5%) had sICH as compared with three patients (4%) in the control group (p=0.73).
  
  
  CONCLUSIONS
  Contrast agents given for CT angiography, performed in patients with normal and abnormal creatinine level, neither caused renal injury nor interfered with the safety of tPA treatment.
authors: Department of Neurology, Masaryk University, St Anne's University Hospital, Pekarská 53, 656 91 Brno, Czech Republic.
authors: P
authors: P
authors: Aulicky
authors: R
authors: R
authors: Mikulík
authors: D
authors: D
authors: Goldemund
authors: M
authors: M
authors: Reif
authors: M
authors: M
authors: Dufek
authors: T
authors: T
authors: Kubelka
mesh_terms: D000368:Aged; D002533:Cerebral Angiography / Q000009:adverse effects*; D002543:Cerebral Hemorrhage / Q000453:epidemiology; D015331:Cohort Studies; D003287:Contrast Media / Q000009:adverse effects; D003404:Creatinine / Q000097:blood; D005260:Female; D005343:Fibrinolytic Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D007275:Injections, Intravenous; D007674:Kidney Diseases / Q000209:etiology*; D007677:Kidney Function Tests; D008297:Male; D008875:Middle Aged; D010960:Plasminogen Activators / Q000627:therapeutic use; D012189:Retrospective Studies; D020521:Stroke / Q000150:complications* / Q000401:mortality / Q000628:therapy*; D015912:Thrombolytic Therapy; D010959:Tissue Plasminogen Activator / Q000627:therapeutic use; D014057:Tomography, X-Ray Computed / Q000009:adverse effects*
chemical_list: D003287:Contrast Media; D005343:Fibrinolytic Agents; D003404:Creatinine; D010960:Plasminogen Activators; D010959:Tissue Plasminogen Activator