title: Alteration of vascular function is an important factor in the correlation between visit-to-visit blood pressure variability and cardiovascular disease.
abstract: OBJECTIVE
  To assess how visit-to-visit variability of SBP correlates with systemic atherosclerotic change and various prognoses.
  
  
  BACKGROUND
  Visit-to-visit SBP variability correlates with cardiovascular events. However, the mechanisms underlying the impact of visit-to-visit SBP variability on prognoses are poorly understood.
  
  
  RESULTS
  A total of 485 patients with essential hypertension from the Non-Invasive Atherosclerotic Evaluation in Hypertension (NOAH) study cohort were included. We analyzed the correlation between visit-to-visit SBP variability and multiple clinical parameters. Next, we prospectively examined the correlation of SBP variability and frequency of cardiovascular disease (CVD) and total mortality. Patients with higher SBP variability exhibited significantly higher rates of statin use, as well as higher pulse wave velocity (PWV), left-ventricular mass index (LVMI), plaque score, and resistive index of the common carotid artery; these patients also exhibited lower estimated glomerular filtration rate. Kaplan-Meier analysis demonstrated that patients with higher SBP variability have a significantly higher incidence of CVD and mortality rate. The hazard ratio of SBP variability for incidence of CVD was greatly diminished after adjustment for intima-media thickness, plaque score, and resistive index, and was slightly diminished after adjustment for PWV and LVMI. Visit-to-visit SBP variability remained an independent risk factor for mortality after adjustment.
  
  
  CONCLUSIONS
  Visit-to-visit SBP variability correlates significantly with systemic atherosclerotic change, incidence of CVD, and mortality rate. Altered arterial functions, such as macrovascular atherosclerosis and vascular resistance, are responsible for the correlations between visit-to-visit SBP variability and incidence of CVD.
authors.affiliation: Department of Geriatric Medicine and Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Kawai
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Ohishi
authors.forename: Norihisa
authors.initials: N
authors.lastname: Ito
authors.forename: Miyuki
authors.initials: M
authors.lastname: Onishi
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Takeya
authors.forename: Koichi
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Kei
authors.initials: K
authors.lastname: Kamide
authors.forename: Hiromi
authors.initials: H
authors.lastname: Rakugi
mesh_terms: D000368:Aged; D001794:Blood Pressure; D001808:Blood Vessels / Q000502:physiology* / Q000503:physiopathology; D002318:Cardiovascular Diseases / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009819:Office Visits