title: [Depressive effect of total flavonoid fraction of Asttragalus complanatus R. Br and its influence upon hemodynamics in SHR].
abstract: OBJECTIVE
  To investigate effects of total flavonoid fraction of Asttragalus complanatus on blood pressure in conscious spontaneously hypertensive rats(SHR) and hemodynamics in anesthetized SHR.
  
  
  METHODS
  Blood pressure was recorded with tail-culf method and hemodynamics was recorded with polygraph after administration of total flavonoid fraction of Asttragalus complanatus.
  
  
  RESULTS
  Total flavonoid fraction of Asttragalus complanatus (100, 200 mg.kg-1) could decrease blood pressure of conscious SHR(decreasing 7.1%, P < 0.05 and 9.3%, P < 0.01 respectively). Meanwhile, there was no significant change in heart rate(HR). R Br (200 mg.kg-1) could decrease total peripheral resistance (TPR) (decreasing 20%, P < 0.05) but did not influence the cardiac output(CO) and heart rate in anesthetized SHR.
  
  
  CONCLUSIONS
  Total flavonoid fraction of Asttragalus complanatus possesses obvious hypotensive effect, mainly by means of decreasing the TPR.
authors.affiliation: Department of Pathophysiology, School of Medicine, Shandong University, Jinan, 250012, Shandong, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Xue
authors.forename: Jing-xin
authors.initials: JX
authors.lastname: Li
authors.forename: Lian-bi
authors.initials: LB
authors.lastname: Chen
mesh_terms: D000818:Animals; D000959:Antihypertensive Agents / Q000494:pharmacology; D027883:Astragalus Plant / Q000737:chemistry*; D001794:Blood Pressure / Q000187:drug effects*; D002302:Cardiac Output / Q000187:drug effects; D004365:Drugs, Chinese Herbal / Q000302:isolation & purification / Q000494:pharmacology; D005260:Female; D005419:Flavonoids / Q000302:isolation & purification / Q000494:pharmacology*; D006339:Heart Rate / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects*; D006973:Hypertension / Q000503:physiopathology*; D008297:Male; D010946:Plants, Medicinal / Q000737:chemistry; D051381:Rats; D011918:Rats, Inbred SHR; D014655:Vascular Resistance / Q000187:drug effects
chemical_list: D000959:Antihypertensive Agents; D004365:Drugs, Chinese Herbal; D005419:Flavonoids