Systolodiastolic variations of blood flow during central retinal vein occlusion: exploration by dynamic angiography.

ABSTRACT:

Background/aim

In patients with acute central retinal vein occlusion (CRVO), dynamic angiography may reveal the presence of pulsatile flow (termed here pulsatile venular outflow, PVO) within first order veins (that is, the large veins). The main goal of this study was to investigate the mechanism underlying PVO.

Methods

10 patients with CRVO and PVO were included. Quantitative and qualitative analysis of venous flow on dynamic angiograms allowed the correlation, temporally, of second and first order vein flow on the one hand, and venous flow and systolic cycle on the other.

Results

Analysis of the time-velocity curve showed that (1) the onset of arterial systole preceded the onset of PVO by less than 0.08 seconds (n = 5); (2) PVO onset was simultaneous to the time of

SUBMITTER: Paques M 

PROVIDER: S-EPMC1772784 | biostudies-literature | 2005 Aug

REPOSITORIES: biostudies-literature