title: [Correlation between pressure-derived coronary collateral flow and Rentrop grade after primary percutaneous intervention of acute myocardial infarction].
abstract: OBJECTIVE
  To analyze the correlation between pressure-derived collateral coronary flow (PDCF) and Rentrop grade of patients with acute myocardial infarction (AMI).
  
  
  METHODS
  PDCF, determined by the ratio of P(w)/P(a), was measured in 29 patients with AMI of the first onset who received primary percutaneous coronary intervention (PCI) within 12 h after the onset. Sufficient collateral flow (group A, n=19) was defined as PDCF>0.24 and insufficient collateral flow (group B, n=10) as PDCF< or =0.24. Rentrop grade of the collateral flow was evaluated by coronary angiography. Echocardiography was performed on the 3rd and 30th day after PCI. The left ventricular ejection fraction, end-systolic and end-diastolic volumes, and the related indexes were obtained.
  
  
  RESULTS
  Rentrop grade was significantly related to PDCF (r=0.75, P<0.01), but a wide range of PDCF was observed in patients with Rentrop grade< or =1.
  
  
  CONCLUSIONS
  PDCF measurement allows quantitative evaluation of the collateral flow in patients with AMI.
authors.affiliation: Affiliated Shantou Hospital of Sun Yat-sen University, Shantou 515031, China. czx@sthospital.com
authors.forename: Zhi-xiong
authors.initials: ZX
authors.lastname: Cai
authors.forename: Xiao-qing
authors.initials: XQ
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Lan
authors.forename: Lian-qing
authors.initials: LQ
authors.lastname: Hu
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
authors.forename: Zhi-dan
authors.initials: ZD
authors.lastname: Zhu
authors.forename: Shun-qi
authors.initials: SQ
authors.lastname: Guo
authors.forename: Yan-hua
authors.initials: YH
authors.lastname: Luo
authors.forename: Rong-he
authors.initials: RH
authors.lastname: Xu
mesh_terms: D000328:Adult; D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D001794:Blood Pressure / Q000502:physiology; D003097:Collateral Circulation / Q000502:physiology*; D017023:Coronary Angiography / Q000379:methods; D003326:Coronary Circulation / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000628:therapy; D018919:Neovascularization, Physiologic; D012039:Regional Blood Flow