Browsing by Author "Yilmaz, G."

Filter results by typing the first few letters
Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Analysis of Choroidal Thickness in AP-ROP, Threshold Disease and ROP Without Laser Photocoagulation
    (2016) Gokgoz-Ozisik, G.; Akkoyun, Imren; Oto, S.; Bayar, S. A.; Tarcan, A.; Kayhan, Z.; Yilmaz, G.; https://orcid.org/0000-0001-9037-7394; https://orcid.org/0000-0002-2860-7424; https://orcid.org/0000-0003-0171-4200; https://orcid.org/0000-0001-5109-755X; https://orcid.org/0000-0003-0579-1115; 26142227; ABG-6096-2021; AAK-7713-2021; AAJ-4668-2021; AAJ-2406-2021; AAJ-4623-2021
    Background. Enhanced depth imaging (EDI) and spectral domain optical coherence tomography (SD-OCT) provide high-definition cross-sectional images of the choroid. Information on alterations in choroidal thickness (CT) after laser photocoagulation (LC) in aggressive posterior retinopathy of prematurity (APROP) and threshold disease (TD) is rare. Patients and methods. A total of 75 eyes were retrospectively analyzed in 4 groups. Groups 1 and 2 included patients with APROP and TD, respectively, who underwent LC. Group 3 included ROP children who did not undergo LC and group 4 included full-term children. Infants aged >= 4 < 7, who had examination of subfoveal (SF) CT with SD-EDI-OCT, visual acuity (VA), spherical equivalent (SE), anterior segment and fundus examination, axial lenght (AXL) were included. The results of SFCT, VA and SE at the age of >= 4 < 7 years, AXL, gestational age (GA), birth weight (BW) and age at examination were compared between the groups. Potential risk factors (GA, BW, SE, AXL and SFCT) influencing visual acuity were evaluated by using multivariate linear regression analysis. Results. The results of SFCT and AXL were not significantly different between groups 2 and 3 or between groups 3 and 4. There was a significant difference between the other groups for SFCT and AXL and VA was significantly different between all groups. The SE was not significantly different between groups 3 and 4 but there was a significant difference for SE, BW and GA between the groups. Age at examination was not significantly different between the groups. Multivariate linear regression analysis revealed SFCT for groups 1 and 2, GA for group 3 and GA, SFCT and AXL for group 4 as independent risk factors influencing visual acuity. Conclusion. The regression model used for groups 1-4 explains the variation of the dependent risk factor LogMar VA for groups 1-4 with 31.2 %, 43.5 %, 9.6 % and 69.4 %, respectively. These values expressed in percentage demonstrate that even more predictors may influence the dependent factor LogMar VA than evaluated in the study.
  • Thumbnail Image
    Item
    Evaluation of choroidal thickness using enhanced depth imaging by spectral-domain optical coherence tomography in patients with pseudoexfoliation syndrome
    (2015) Eroglu, F.C.; Asena, L.; Simsek, C.; Kal, A.; Yilmaz, G.; 25853396
    Purpose To investigate the choroidal thickness using optical coherence tomography in the eyes of patients with unilateral and bilateral pseudoexfoliation syndrome and to compare them with healthy controls. Methods We studied four groups: (1) affected eyes from 30 patients with unilateral PEX syndrome affecting the right eye of 17 patients and the left eye of 13 patients; (2) clinically unaffected eyes of 30 patients with unilateral PEX syndrome; (3) the eyes of 30 patients with bilateral PEX syndrome; and (4) the eyes of 30 normal healthy subjects. Choroidal thickness was evaluated using high-speed, high-resolution enhanced depth imaging by spectral-domain optical coherence tomography. Optical coherence tomography features were compared in all groups using the statistical package SPSS v 15.0. Results The mean subfoveal choroidal thicknesses were 237.35 +/- 58.01 mu m in group 1; 330.75 +/- 47.84 mu m in group 2; 206.3 +/- 86.75 mu m in group 3; and 311.8 +/- 51.42 mu m in group 4. Significant differences in the mean subfoveal choroidal thickness were found between groups 1 and 2 (P < 0.001), groups 1 and 4 (P = 0.004), groups 2 and 3 (P < 0.001), and groups 3 and 4 (P < 0.001). Conclusion In this study, it was observed that clinically affected eyes of patients with PEX syndrome have significantly thinner choroids compared with the clinically unaffected eyes of patients with unilateral PEX syndrome and eyes of healthy controls.
  • No Thumbnail Available
    Item
    The prevalence and clinical features of atrial fibrillation in heart failure patients with midrange ejection fraction in the Turkish population
    (2021) Kivrak, T. Tarik; Kis, M.; Guzel, T.; Kaplan, M.; Kocabas, U.; Dogdus, M.; Sinan, U.Y.; Karaca, O.; Yeni, M.; Yilmaz, G.; Yavuz, V.; Tok, O.O.; Urgun, O.D.; Bolayir, H.A.