PURPOSE. To examine the relation between intima- media thickness (IMT) in the common carotid artery, which is generally recognized as a marker of early atherosclerosis, and retinal circulatory parameters. METHODS. The...PURPOSE. To examine the relation between intima- media thickness (IMT) in the common carotid artery, which is generally recognized as a marker of early atherosclerosis, and retinal circulatory parameters. METHODS. The vessel diameter and blood velocity of retinal arterioles were measured with laser Doppler, velocimetry (LDV) in 33 patientswith coronary artery disease (CAD), because they were thought to have general atherosclerosis. The retinal blood flow (RBF) and wall shear rate (WSR), an index of wall shear stress in retinal vessels, were calculated from the two parameters. The carotid IMT was evaluated with B- mode ultrasonography. RESULTS. The patients were divided into two groups: those with an IMT >0.70 mm and those with an IMT ≤ 0.70 mm. The blood velocity, WSR, and upstroke time in the retinal arterioles were signifi- cantly higher in the group with an IMT > 0.70 mm compared with the group with an IMT ≤ 0.70 mm. There were no significant differences in vessel diameter and RBF between the groups. Positive correlations were found between the carotid IMT and blood velocity (r=0.51, P=0.002) and WSR (r= 0.60, P=0.0001). Multiple regression analysis showed that the retinal WSR and blood velocity correlated independently with the IMT in patients with CAD. CONCLUSIONS. The present findings;from this pilot study suggest that the retinal circulatory parameters measured by LDV may be associated with systemic atherosclerosis. These results support recent studies showing an association between retinal microvascular changes and cardiovascular disease.展开更多
孔源性视网膜脱离(Rhegmatogenous retinal detachment,RRD)是严重致盲性眼病,玻璃体切割术(Pars plana vitrectomy,PPV)联合硅油填充是治疗RRD的常用手术方式。研究表明,使用硅油填充的RRD患眼会出现视网膜微循环的改变[1]。此外,在硅...孔源性视网膜脱离(Rhegmatogenous retinal detachment,RRD)是严重致盲性眼病,玻璃体切割术(Pars plana vitrectomy,PPV)联合硅油填充是治疗RRD的常用手术方式。研究表明,使用硅油填充的RRD患眼会出现视网膜微循环的改变[1]。此外,在硅油填充期间及硅油取出术后均有大幅度视力下降的病例报道,在这些病例中发现了视网膜血流的变化[1-2]。展开更多
文摘PURPOSE. To examine the relation between intima- media thickness (IMT) in the common carotid artery, which is generally recognized as a marker of early atherosclerosis, and retinal circulatory parameters. METHODS. The vessel diameter and blood velocity of retinal arterioles were measured with laser Doppler, velocimetry (LDV) in 33 patientswith coronary artery disease (CAD), because they were thought to have general atherosclerosis. The retinal blood flow (RBF) and wall shear rate (WSR), an index of wall shear stress in retinal vessels, were calculated from the two parameters. The carotid IMT was evaluated with B- mode ultrasonography. RESULTS. The patients were divided into two groups: those with an IMT >0.70 mm and those with an IMT ≤ 0.70 mm. The blood velocity, WSR, and upstroke time in the retinal arterioles were signifi- cantly higher in the group with an IMT > 0.70 mm compared with the group with an IMT ≤ 0.70 mm. There were no significant differences in vessel diameter and RBF between the groups. Positive correlations were found between the carotid IMT and blood velocity (r=0.51, P=0.002) and WSR (r= 0.60, P=0.0001). Multiple regression analysis showed that the retinal WSR and blood velocity correlated independently with the IMT in patients with CAD. CONCLUSIONS. The present findings;from this pilot study suggest that the retinal circulatory parameters measured by LDV may be associated with systemic atherosclerosis. These results support recent studies showing an association between retinal microvascular changes and cardiovascular disease.
文摘孔源性视网膜脱离(Rhegmatogenous retinal detachment,RRD)是严重致盲性眼病,玻璃体切割术(Pars plana vitrectomy,PPV)联合硅油填充是治疗RRD的常用手术方式。研究表明,使用硅油填充的RRD患眼会出现视网膜微循环的改变[1]。此外,在硅油填充期间及硅油取出术后均有大幅度视力下降的病例报道,在这些病例中发现了视网膜血流的变化[1-2]。
