scholarly journals Diagnostic Ability of Retinal Arteriolar Diameter Measurements in Glaucoma

2016 ◽  
Vol 57 (4) ◽  
pp. 2166 ◽  
Author(s):  
Evre Pekel ◽  
Gökhan Pekel
Keyword(s):  
Diagnostic Ability ◽  
Arteriolar Diameter ◽  
Retinal Arteriolar ◽  
Retinal Arteriolar Diameter

Impact of current and past blood pressure on retinal arteriolar diameter in an older population

2004 ◽  
Vol 22 (8) ◽  
pp. 1543-1549 ◽  
Author(s):  
Harry Leung ◽  
Jie Jin Wang ◽  
Elena Rochtchina ◽  
Tien Y Wong ◽  
Ronald Klein ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Older Population ◽  
Arteriolar Diameter ◽  
Retinal Arteriolar ◽  
Retinal Arteriolar Diameter

Nitric oxide does not mediate autoregulation of retinal blood flow in newborn pig

1995 ◽  
Vol 269 (3) ◽  
pp. H1065-H1072 ◽  
Author(s):  
J. M. Gidday ◽  
Y. Zhu
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Retinal Blood Flow ◽  
Nitric Oxide Synthase Inhibitor ◽  
Arterial Blood ◽  
Synthase Inhibitor ◽  
Oxide Synthase ◽  
Arteriolar Diameter ◽  
Retinal Arteriolar ◽  
Retinal Arteriolar Diameter

Isoflurane-anesthetized newborn pigs were used to test the hypothesis that nitric oxide mediates autoregulatory dilations of retinal arterioles. Fundus images were monitored by videomicroscopy at x310, and stimulus-induced changes in retinal arteriolar diameter were measured by on-line image analysis. Dilatative responses to systemic hypoxia (arterial O2 tension 20-30 mmHg), hypotension (mean arterial blood pressure 40 mmHg), or hypercapnia (arterial CO2 tension 70-85 mmHg) were assessed after intravitreal microsuffusion of the nitric oxide synthase inhibitor NG-monomethyl-L-arginine (L-NMMA) over the observed arterioles. Twenty-five nanomoles L-NMMA constricted arterioles by 24 +/- 2% (P < 0.01; n = 17 pigs); a significant constriction (14 +/- 2%) was still observed 80 min after drug administration (n = 5). Complete nitric oxide synthase inhibition at this dose was indicated by the findings that co-administration of 2.5 mumol L-arginine reversed this constriction within 17 +/- 2 min (n = 3), that L-NMMA, but not D-NMMA, completely inhibited the 20 +/- 3% P < 0.01) arteriolar dilation induced by intravitreal acetylcholine (7.5 nmol; n = 4), and that no additional constriction was evidenced after administration of a 10-fold greater concentration of L-NMMA (n = 8). However, despite the prominent arteriolar constriction induced by L-NMMA under baseline conditions, increases in retinal arteriolar diameter still occurred in response to hypoxia (n = 5), hypotension (n = 4), or hypercapnia (n = 5) in animals pretreated with 50 nmol L-NMMA; these responses did not differ significantly from arteriolar dilations observed in untreated control animals (n = 16) subjected to the same stimuli.(ABSTRACT TRUNCATED AT 250 WORDS)

RETINAL VESSEL ANALYZER MEASUREMENTS OF THE EFFECT OF PANRETINAL PHOTOCOAGULATION ON THE RETINAL ARTERIOLAR DIAMETER IN DIABETIC RETINOPATHY

Retina ◽  
2010 ◽  
Vol 30 (4) ◽  
pp. 555-561 ◽  
Author(s):  
EFSTRATIOS MENDRINOS ◽  
GEORGIOS MANGIORIS ◽  
DOMNIKI N. PAPADOPOULOU ◽  
ANDRÉ A. DOSSO ◽  
CONSTANTIN J. POURNARAS
Keyword(s):  
Diabetic Retinopathy ◽  
Retinal Vessel ◽  
Panretinal Photocoagulation ◽  
Retinal Vessel Analyzer ◽  
Arteriolar Diameter ◽  
Retinal Arteriolar ◽  
Retinal Arteriolar Diameter

scholarly journals Relationship of Blood Pressure and Other Factors to Serial Retinal Arteriolar Diameter Measurements Over Time

2012 ◽  
Vol 130 (8) ◽  
pp. 1019 ◽  
Author(s):  
Ronald Klein ◽  
Chelsea E. Myers ◽  
Michael D. Knudtson ◽  
Kristine E. Lee ◽  
Ronald Gangnon ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Relationship Of ◽  
Arteriolar Diameter ◽  
Over Time ◽  
Retinal Arteriolar ◽  
Retinal Arteriolar Diameter
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