Impact of coronary artery bypass grafting surgery on the chorioretinal biomicroscopic characteristics

Table 1 Demographic characteristics of the participants, n (%)

Item		Value
Sex	Male	14 (56.0)
	Female	11 (44.0)
Diabetic	No	17 (68.0)
	Yes	8 (32.0)
Systemic hypertension	No	12 (48.0)
	Yes	13 (52.0)
Age, yr	mean ± SD	62.84 ± 10.49
	Median (range)	64 (33-80)

Table 2 Changes in best-corrected visual acuity after coronary artery bypass grafting

	mean ± SD	Median (range)
Pre-surgery BCVA (decimal)	0.80 ± 0.16	0.8 (0.4-1.0)
Post-surgery BCVA (decimal)	0.70 ± 0.29	0.8 (0.4-1.0)
P value1	0.037
Pre-surgery BCVA (logMAR)	0.11 ± 0.10	0.1 (0-0.4)
Post-surgery BCVA (logMAR)	0.15 ± 0.08	0.1 (0-0.4)
P value1	0.031

¹Paired t-test.

BVCA: Best-corrected visual acuity.

Table 3 Comparison of choroidal and macular thicknesses and macular and prepapillary nerve fiber layer thicknesses before and after coronary artery bypass grafting

	mean ± SD	Median (range)
Preoperative choroidal thickness	283.49 ± 42.79	289 (183-366)
Postoperative choroidal thickness	283.29 ± 43.21	291 (190-359)
P value1	0.853
Preoperative macular thickness	267.92 ± 31.64	263 (221-426)
Postoperative macular thickness	267.33 ± 31.19	261 (218-420)
P value1	0.507
Preoperative macular NFL thickness	12.35 ± 2.30	12 (8-18)
Postoperative macular NFL thickness	12.35 ± 2.64	13 (7-19)
P value1	> 0.999
Preoperative prepapillary NFL thickness	105.10 ± 12.36	103 (79-136)
Preoperative prepapillary NFL thickness	104.98 ± 12.84	101 (76-137)
P value1	0.659
Preoperative venous caliber	101.13 ± 9.20	100.6 (85-121)
Postoperative venous caliber	100.96 ± 9.83	102.3 (85.0-123.2)
P value1	0.673
Preoperative arterial caliber	79.42 ± 7.62	79 (66.3-98.0)
Postoperative arterial caliber	79.39 ± 7.94	79 (65.4-100.2)
P value1	0.923

¹Paired t-test.

NFL: Nerve fiber layer.

Table 4 Comparison of best-corrected visual acuity, choroidal and macular thicknesses, macular and prepapillary nerve fiber layer thicknesses, arterial and venous caliber before and after coronary artery bypass grafting in diabetic patients

	mean ± SD	Median (range)	P value1
Preoperative BCVA (decimal)	0.75 ± 0.12	0.75 (0.50, 0.90)	> 0.999
Postoperative BCVA (decimal)	0.75 ± 0.13	0.75 (0.50, 1.00)
Preoperative BCVA (logMAR)	0.13 ± 0.07	0.13 (0.05, 0.30)	> 0.999
Postoperative BCVA (logMAR)	0.13 ± 0.07	0.13 (0, 0.30)
Preoperative choroidal thickness	297 ± 51.73	314.5 (183.0, 343.0)	0.532
Postoperative choroidal thickness	298.44 ± 53.61	320 (190, 346)
Preoperative macular thickness	271.56 ± 43.36	262 (240, 426)	0.126
Postoperative macular thickness	273.50 ± 41.83	262 (237, 420)
Preoperative macular NFL thickness	12.13 ± 1.67	12 (8, 14)	0.203
Postoperative macular NFL thickness	12.56 ± 2.37	12.5 (9.0, 17.0)
Preoperative prepapillary NFL thickness	105.50 ± 13.24	98.5 (93.0, 127.0)	0.060
Postoperative prepapillary NFL thickness	106.19 ± 13.99	99.5 (92.0, 129.0)
Preoperative venous caliber	102.30 ± 8.51	102.6 (88.3, 115.3)	0.415
Postoperative venous caliber	101.74 ± 9.73	103.7 (85.0, 114.7)
Preoperative arterial caliber	77.56 ± 7.68	77.8 (68.0, 95.6)	0.363
Postoperative arterial caliber	77.03 ± 8.27	76.45 (65.40, 91.60)

¹Paired t-test.

BVCA: Best-corrected visual acuity; NFL: Nerve fiber layer.

Table 5 Comparison of best-corrected visual acuity, choroidal and macular thicknesses, macular and prepapillary nerve fiber layer thicknesses, arterial and venous caliber before and after coronary artery bypass grafting in patients with vision loss

	mean ± SD	Median (range)	P value1
Preoperative BCVA (decimal)	0.75 ± 0.16	0.8 (0.5, 0.9)	0.002
Postoperative BCVA (decimal)	0.64 ± 0.17	0.7 (0.4, 0.8)
Preoperative BCVA (logMAR)	0.13 ± 0.10	0.10 (0.05, 0.30)	0.003
Postoperative BCVA (logMAR)	0.21 ± 0.13	0.15 (0.10, 0.40)
Preoperative choroidal thickness	290.36 ± 37.70	304 (212, 343)	0.964
Postoperative choroidal thickness	290.27 ± 40.06	300 (218, 345)
Preoperative macular thickness	262.18 ± 15.31	261 (235, 284)	0.035
Postoperative macular thickness	264.73 ± 15.77	260 (233, 286)
Preoperative macular NFL thickness	12.64 ± 2.11	12 (10, 18)	0.903
Postoperative macular NFL thickness	12.64 ± 2.66	13 (10, 19)
Preoperative prepapillary NFL thickness	106.55 ± 11.12	110 (89, 125)	> 0.999
Postoperative prepapillary NFL thickness	106.64 ± 11.75	112 (89, 126)
Preoperative venous caliber	97.30 ± 9.03	96.0 (87.0, 110.6)	0.228
Postoperative venous caliber	96.60 ± 10.05	95.0 (85.1, 109.0)
Preoperative arterial caliber	78.45 ± 6.34	79.6 (66.3, 86.3)	0.689
Postoperative arterial caliber	77.98 ± 6.98	78.3 (66.0, 91.0)

¹Paired t test.

BVCA: Best-corrected visual acuity; NFL: Nerve fiber layer.