title: Relationship between slow coronary flow and left atrial appendage blood flow velocities.
abstract: OBJECTIVE
  This study was undertaken to assess whether slow coronary flow (SCF)is related to low left atrial appendage (LAA) blood flow velocities.
  
  
  METHODS
  Study subjects consist of 44 patients with SCF and 11 volunteer subjects with normal coronary angiogram. The diagnosis of SCF was made using the TIMI frame count method. The blood flow velocities were obtained by placing a pulsed-wave Doppler sample volume inside the proximal third of the LAA.
  
  
  RESULTS
  The mean LAA emptying velocities (MEV)were significantly lower in patients than control subjects (34.5 +/- 9.9 cm/sec vs 84.0 +/- 12.1 cm/sec; P < 0.001). In bivariate analysis, significant correlation was found between MEV, and systolic pulmonary venous flow, mean TIMI frame count, deceleration time, and isovolumetric relaxation time (P < 0.05). By multiple linear regression analysis, mean TIMI frame count (beta=-0.865, P < 0.001) was identified as independent predictors of MEV.
  
  
  CONCLUSIONS
  This study indicates that SCF phenomenon may be related to low LAA blood flows.
authors.affiliation: Cardiology Department of Harran University, Sanliurfa, Turkey. rdemirbag@yahoo.com
authors.forename: Recep
authors.initials: R
authors.lastname: Demirbag
authors.forename: Mustafa
authors.initials: M
authors.lastname: Gur
authors.forename: Remzi
authors.initials: R
authors.lastname: Yilmaz
authors.forename: Sukru
authors.initials: S
authors.lastname: Arslan
authors.forename: Niyazi
authors.initials: N
authors.lastname: Guler
mesh_terms: D000328:Adult; D020517:Atrial Appendage / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D001783:Blood Flow Velocity; D017023:Coronary Angiography; D003326:Coronary Circulation; D017548:Echocardiography, Transesophageal; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018608:Ultrasonography, Doppler