title: In vivo adaptive response of the peripheral conduit artery in patients with borderline systolic hypertension.
abstract: OBJECTIVE
  To investigate elastic changes of the radial artery, a medium-sized muscular peripheral conduit artery, in patients with borderline systolic hypertension.
  
  
  METHODS
  Using a non-invasive high-resolution echo-tracking device coupled to a photoplethysmography (Finapres system) allowing simultaneous arterial diameter and finger blood pressure monitoring, we measured radial artery elastic parameters of 20 patients with borderline systolic hypertension and 20 normal subjects according to Langewouters model.
  
  
  RESULTS
  The diameter of the radial artery of control subjects and those with borderline systolic hypertension at the isobaric level of 100 mmHg and mean arterial pressure was similar, but the compliance and distensibility at similar conditions in patients with borderline systolic hypertension did not further reduced and even increased.
  
  
  CONCLUSIONS
  In patients with borderline systolic hypertension, the adaptive responses of the radial artery compliance and distensibility to increased pressure were directed to maintain its elasticity, contributing to the homeostasis of the cardiovascular system.
authors.affiliation: Department of Cardiology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China. taojungz@yahoo.com
authors.forename: Jun
authors.initials: J
authors.lastname: Tao
authors.forename: Yafei
authors.initials: Y
authors.lastname: Jin
authors.forename: Lichun
authors.initials: L
authors.lastname: Wang
authors.forename: Anli
authors.initials: A
authors.lastname: Tang
authors.forename: Xinxue
authors.initials: X
authors.lastname: Liao
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.forename: Hong
authors.initials: H
authors.lastname: Ma
mesh_terms: D000222:Adaptation, Physiological; D000368:Aged; D003187:Compliance; D005260:Female; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D017534:Radial Artery / Q000503:physiopathology*; D013599:Systole