title: Valuation of Normal Range of Ankle Systolic Blood Pressure in Subjects with Normal Arm Systolic Blood Pressure.
abstract: METHODS
  This study aimed to establish a normal range for ankle systolic blood pressure (SBP).
  
  
  METHODS
  A total of 948 subjects who had normal brachial SBP (90-139 mmHg) at investigation were enrolled. Supine BP of four limbs was simultaneously measured using four automatic BP measurement devices. The ankle-arm difference (An-a) on SBP of both sides was calculated. Two methods were used for establishing normal range of ankle SBP: the 99% method was decided on the 99% reference range of actual ankle BP, and the An-a method was the sum of An-a and the low or up limits of normal arm SBP (90-139 mmHg).
  
  
  RESULTS
  Whether in the right or left side, the ankle SBP was significantly higher than the arm SBP (right: 137.1 ± 16.9 vs 119.7 ± 11.4 mmHg, P<0.05). Based on the 99% method, the normal range of ankle SBP was 94~181 mmHg for the total population, 84~166 mmHg for the young (18-44 y), 107~176 mmHg for the middle-aged(45-59 y) and 113~179 mmHg for the elderly (≥ 60 y) group. As the An-a on SBP was 13 mmHg in the young group and 20 mmHg in both middle-aged and elderly groups, the normal range of ankle SBP on the An-a method was 103-153 mmHg for young and 110-160 mmHg for middle-elderly subjects.
  
  
  CONCLUSIONS
  A primary reference for normal ankle SBP was suggested as 100-165 mmHg in the young and 110-170 mmHg in the middle-elderly subjects.
authors.affiliation: Department of Cardiology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Gong
authors.affiliation: Department of Cardiology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China.
authors.forename: Kai-wu
authors.initials: KW
authors.lastname: Cao
authors.affiliation: Department of Cardiology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China.
authors.forename: Jin-song
authors.initials: JS
authors.lastname: Xu
authors.affiliation: Department of Cardiology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China.
authors.forename: Ju-xiang
authors.initials: JX
authors.lastname: Li
authors.affiliation: Department of Cardiology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China.
authors.forename: Kui
authors.initials: K
authors.lastname: Hong
authors.affiliation: Department of Cardiology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China.
authors.forename: Xiao-shu
authors.initials: XS
authors.lastname: Cheng
authors.affiliation: Department of Cardiology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China.
authors.forename: Hai
authors.initials: H
authors.lastname: Su
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000842:Ankle / Q000502:physiology*; D001132:Arm / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology*; D005121:Extremities; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D013599:Systole / Q000502:physiology*; D055815:Young Adult