Biomedical subjects

L Magargal

Publications and source records attributed to L Magargal.

3 recordsLinked to original sources

PubMed1991

Foveal avascular zone diameter and sickle cell disease.

Patients with sickle cell disease can have a distinct retinopathy in which the posterior pole shows abnormalities, including perifoveolar vascular abnormalities. The foveal avascular zone (FAZ) was examined using fluorescein angiography in patients with sickle cell disease and in healthy normal controls. The longest FAZ diameters of 38 patients (51 eyes) with sickle cell disease were compared with those of the 48 patients (60 eyes) in the control group. The average of the longest FAZ diameter in the patients with sickle cell disease was 1.00 mm compared with 0.61 mm for the controls. This difference was statistically significant (P less than .00001). Within the sickle cell group, there were no significant differences in the FAZ diameters with respect to degree of retinopathy, type of sickle hemoglobinopathy, or visual acuity. Thus, an enlarged FAZ diameter in patients with sickle cell disease is confirmed.

Adult↗

PubMed1981

Prepapillary vascular loops.

Twenty-one eyes in eighteen patients with prepapillary vascular loops were studied. Fluorescein angiography demonstrated 20 of the loops to be arterial and one to be venous. The wide range of clinical and angiographic variations of prepapillary loops are described. Cilioretinal arteries were seen in 16 of 21 eyes with loops and occasionally provided a major portion of the blood supply to the retina. In addition to the previously described complications of vitreous hemorrhage and branch retinal artery obstruction in eyes with a prepapillary arterial loop, hyphema and amaurosis fugax were notable new associations.

Adolescent↗

PubMed1979

Preretinal arterial loops and retinal arterial occlusion.

A 19-year-old man had bilateral congenital preretinal arterial loops emerging from the optic disk into the vitreous cavity. The loop in the right eye was associated with an inferior papillary arterial occlusion. Extensive examination to determine a systemic cause of the occlusion was negative; twisting or kinking of the loop may have had a role. The major arterial blood supply in each eye was cilioretinal in origin and in the left eye, the inferior preretinal arterial loop supplied blood to both the retina and the choroid. In three previous cases and our case of preretinal arterial loops associated with branch retinal arterial occlusion, none had emboli or associated systemic factors. All involved solely arterial supply to the inferior retina. The ages of three of the four patients ranged from 19 to 22 years.

Adult↗