title: Use of antihypertension agents for the suppression of arterial pulse pressure waveforms in patients with intracranial aneurysms.
abstract: OBJECTIVE
  Patients with intracranial aneurysms tend toward raised blood pressure and abnormal pulse pressure profiles. The authors have investigated the influence of three antihypertension agents on blood pressure and pulse pressure waveforms in patients with known intracranial aneurysms, with a view to assessing the potential benefits of longterm antihypertension therapy on the progression of unruptured intracranial aneurysms.
  
  
  METHODS
  Nineteen patients with a mean age of 56 years (range 38-76 years) were recruited for this study. All patients had confirmed intracranial aneurysms. A double-blind, randomized, crossover study was performed using perindopril, irbesartan, isosorbide mononitrate, and a placebo. Blood pressure and pulse pressure waveforms were assessed at the end of each 4-week treatment period. Perindopril and irbesartan were well tolerated. For all measured parameters except heart rate (p = 0.03), no significant difference between baseline and placebo was identified. Each drug when compared with placebo reduced peripheral arterial blood pressure. Perindopril significantly decreased mean blood pressure by 10 mm Hg (p = 0.004), irbesartan by 9 mm Hg (p = 0.004), and isosorbide mononitrate by 13 mm Hg (p = 0.005). The administration of each drug effected a significant reduction in the carotid artery augmentation index (AIX) compared with baseline values (perindopril p = 0.01, irbesartan p = 0.0002, and isosorbide mononitrate p = 0.03). There was also a significant difference in the AIX between irbesartan and the placebo (p = 0.05). Compared with the placebo, there was a significant difference in AIX (adjusted for heart rate) following the administration of irbesartan (p = 0.003) and isosorbide mononitrate (p = 0.01), but not with perindopril (p = 0.17).
  
  
  CONCLUSIONS
  Irbesartan appears to be the most effective treatment for the combined suppression of blood pressure and AIX in patients with intracranial aneurysms and has a high degree of patient tolerance.
authors.affiliation: Academic Department of Neurosurgery and Department of Clinical Pharmacology, Addenbrooke's Hospital, Cambridge, United Kingdom.
authors.forename: Carole L
authors.initials: CL
authors.lastname: Turner
authors.forename: Ian B
authors.initials: IB
authors.lastname: Wilkinson
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Kirkpatrick
mesh_terms: D000328:Adult; D000368:Aged; D000959:Antihypertensive Agents / Q000009:adverse effects / Q000627:therapeutic use*; D001713:Biphenyl Compounds / Q000009:adverse effects / Q000627:therapeutic use*; D001794:Blood Pressure / Q000187:drug effects*; D001921:Brain / Q000098:blood supply*; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D002532:Intracranial Aneurysm / Q000188:drug therapy*; D000077405:Irbesartan; D007548:Isosorbide Dinitrate / Q000031:analogs & derivatives* / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D020913:Perindopril / Q000009:adverse effects / Q000627:therapeutic use*; D012307:Risk Factors; D013777:Tetrazoles / Q000009:adverse effects / Q000627:therapeutic use*; D016896:Treatment Outcome
chemical_list: D000959:Antihypertensive Agents; D001713:Biphenyl Compounds; D013777:Tetrazoles; D007548:Isosorbide Dinitrate; D000077405:Irbesartan; C030397:isosorbide-5-mononitrate; D020913:Perindopril