To investigate atherosclerotic and thrombophilic risk factors in patients affected by acute ischemic and nonischemic central retinal vein occlusions (CRVOs).
One hundred and three patients with acute unilateral CRVO (41 ischemic and 62 nonischemic) were studied. The frequency of traditional cardiovascular risk factors was assessed, and the plasma levels of a variety of thrombophilic markers were measured. Univariate logistic regression was performed to determine risk factors for ischemic CRVO.
Arterial hypertension, hypercholesterolemia, postmethionine hyperhomocysteinemia (HHcy), elevated factor VIII, and reduced folic acid and B6 plasma levels were more frequent in patients with ischemic CRVO than in those with nonischemic CRVO (P = 0.030, P = 0.025, P = 0.011, P < 0.001, P < 0.001, and P = 0.044, respectively). Risk factors for ischemic CRVO were arterial hypertension (odds ratio [OR], 3.22; 95% confidence interval [CI], 1.13-9.21; P = 0.037), hypercholesterolemia (OR, 3.03; 95% CI, 1.06-8.65; P = 0.042), reduced folic acid levels (OR, 6.77; 95% CI, 1.59-28.79; P = 0.011), and elevated FVIII levels (OR, 6.17; 95% CI, 2.56-14.82; P < 0.001). Postmethionine HHcy was associated with low folic acid levels (r = −0.413; P = 0.007; OR, 9.33; 95% CI, 2.06-42.18; P = 0.005).
The results of the present study suggest that some atherosclerotic and thrombophilic risk factors may increase the risk of having an ischemic form of CRVO.
This study revealed that several atherosclerotic and thrombophilic risk factors are more frequent in patients with acute ischemic central retinal vein occlusion than in those with nonischemic central retinal vein occlusion. The assessment of these factors and, where possible, their modification might improve the clinical management of this disease.
From the *Eye Clinic, University of Florence, Florence, Italy; and †Thrombosis Center, University of Florence, Florence, Italy.
The authors have no proprietary interests.
Reprint requests: Barbara Giambene, MD, PhD, Clinica Oculistica, Dipartimento di Scienze Chirurgiche Specialistiche, Azienda Ospedaliero-Universitaria Careggi, viale Morgagni 85, 50134 Florence, Italy; e-mail: email@example.com