Journal List > J Korean Ophthalmol Soc > v.51(5) > 1008813

Choi, Kim, and Yun: Intravitreal Bevacizumab Treatment of Macular Edema in Central Retinal Vein Occlusion

Abstract

Purpose

To report the effect of intravitreal injection of bevacizumab for the treatment of macular edema due to central retinal vein occlusion (CRVO).

Methods

In a retrospective study, 18 consecutive patients (18 eyes) with macular edema from CRVO received intravitreal bevacizumab (1.25 mg). Ophthalmic examination included best corrected visual acuity (BCVA) and central macular thickness (CMT) at baseline and follow-up visits. Fluorescein angiography was performed during follow-up visits if necessary. Primary outcomes included a change in BCVA and CMT.

Results

The mean duration from symptom detection to the first bevacizumab injection was 32.5 days. The patients received a mean of 2.17 injections of bevacizumab per eye. The mean baseline visual acuity (LogMAR) was 1.27 and increased to a mean of 0.75 at 5 weeks, and 0.81 at 24 weeks. The mean central macular thickness at baseline was 640.5 μ m and decreased to a mean of 295.6 μ m at 5 weeks and 284.7 μ m at 24 weeks (p<0.05). In the ischemic CRVO group, no significant changes in visual acuity were found after 24 weeks. The increase in visual acuity did not correlate significantly with the decrease in CMT after 24 weeks (p=0.205). The result from the non-ischemic group was similar to the preceding result (p=0.151).

Conclusions

Intravitreal bevacizumab resulted in a significant decrease in CMT in patients with CRVO after a 6-month fol-low-up. The visual acuity in patients with non-ischemic CRVO improved, but there was no significant improvement in the ischemic CRVO group.

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Figure 1.
Change in retinal thickness after bevacizumab injection. A 62-year-old patient (No. 5) presented with non-ischemic central vein occlusion (A and B). He had symptoms for 2 weeks. Visual acuity reduced to 20/1000, and the macula was thickened (680 μm). Only the first injection of bevacizumab led to distinct decrease of retinal thickness to 166 μm (C and D). Visual acuity Improved to 20/40.
jkos-51-707f1.tif
Figure 2.
Boxplot showing the change in visual acuity (LogMAR) in 18 patients with central retinal vein occlusion after intravitreal injection of 1.25 mg bevacizumab, at baseline, 5, 12, 18, and 24 weeks after the first intravitreal injection.
jkos-51-707f2.tif
Figure 3.
Boxplot showing the change in central retinal thickness (μm) as measured by optical coherence tomography in 18 patients with central retinal vein occlusion after intravitreal injection of 1.25mg bevacizumab, at baseline, 5, 12, 18, and 24 weeks after the first intravitreal injection.
jkos-51-707f3.tif
Figure 4.
Boxplot showing the change in visual acuity (LogMAR) in 12 patients with non-ischemic, central retinal vein occlusion after intralvitreal injection of 1.25 mg bevacizumab, at baseline, 5, 12, 18, and 24 weeks after the first intravitreal injection.
jkos-51-707f4.tif
Figure 5.
The relationship between visual acuity increase and macular thickness decrease at 5 weeks (A) and 24 weeks (B) after intravitreal bevacizumab injections in patients with non-ischemic, central retinal vein occlusion, respectively.
jkos-51-707f5.tif
Table 1.
Baseline demography and clinical characteristics of the patients
Patient Sex Age (years) Duration of CRVO (days) Systemic disorder Baseline
5 weeks
12 weeks
18 weeks
24 weeks
Number of injections
V.A* CMT V.A CMT V.A CMT V.A CMT V.A CMT
1 M 62 14 0.8 557 0.8 466 0.7 300 0.2 210 0.2 225 3
2 M 20 7 1.2 624 1 213 1 450 1.2 300 1.1 244 2
3 M 60 63 0.5 587 0.4 217 0.4 240 0.4 235 0.4 278 1
4 M 47 21 2 571 2 169 2 205 2 320 2 268 1
5 M 62 14 hypertension 1.8 680 0.3 166 0.3 215 0.3 220 0.4 250 1
6 F 79 90 hypertension 1.8 509 1 232 1 268 1.1 220 0.9 155 1
7 M 63 28 1 679 0.4 309 0.4 228 0.6 402 0.3 218 3
8 M 58 38 hypertension 0.9 609 0.3 450 1 775 0.9 311 0.8 208 3
9 M 47 90 0.8 567 0.5 445 0.8 784 0.8 849 0.7 392 4
10 M 59 63 Diabetes, colon cancer 0.5 682 0.3 417 0.4 248 0.5 533 0.5 301 3
11 M 61 28 1.8 488 0.7 199 1.8 646 0.5 180 0.5 192 2
12 F 77 28 diabetes 1.8 680 1.8 219 1 328 1.4 246 1.4 350 2
13 M 47 21 0.7 551 0.5 233 0.5 262 1 378 1 687 3
14 M 78 14 1.8 984 2 683 1.4 528 1.8 387 1.4 425 4
15 F 68 28 0.8 623 0.3 250 0.2 599 0.3 244 0.2 240 2
16 M 62 21 1.1 690 0.5 241 0.2 255 0.5 459 0.4 226 2
17 F 47 35 hypertension 1.8 696 0.5 237 0.5 217 0.5 255 2 N-C§ 1
18 F 77 21 hypertension 1.8 753 0.2 175 0.3 185 0.5 172 0.4 181 1

* V.A=visual acuity by LogMAR

CMT=central macular thickness

2,4,12,14=ischemic central retinal vein occlusion patients

§ N-C=central macular thickness is not checked because of vitreous hemorrhage

Π =refused patients for further injection.

Table 2.
Changes in visual acuity and central retinal thickness in macular edema caused by central retinal vein occlusion (total patients, non-ischemic central retinal vein occlusion patients, and ischemic central retinal vein occlusion patients, respectively) (Mean± SD)
    Baseline 5 weeks 12 weeks 18 weeks 24 weeks
Total patients BCVA (LogMAR) 1.27±0.54 0.75±0.59 0.77±0.53 0.81±0.52 0.81±0.57
  CMT (μm) 640.5±111.9 295.6±139.8 374.1±202.6 328.9±163.5 284.7±126.5
Non-ischemic BCVA (LogMAR) 1.20±0.55 0.49±0.26 0.58±0.45 0.51±0.24 0.57±0.49
   patients CMT (μm) 625.9±83.4 279.5±105.6 348.8±203.8 331.6±200.1 241.6±65.0
Ischemic patients BCVA (LogMAR) 1.40±0.54 1.27±0.77 1.15±0.50 1.38±0.44 1.31±0.42
  CMT (μm) 669.8±160.3 327.8±200.2 424.6±208.6 323.7±52.4 363.7±176.7
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