Xie Shiqi, Fang Yuxin, Du Ran, Onishi Yuka, Yokoi Tae, Moriyama Muka, Watanabe Takashi, Ohno-Matsui Kyoko
Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University, Tokyo, Japan .
Retina. 2021 May 1;41(5):1063-1070. doi: 10.1097/IAE.0000000000002970.
To investigate the dilated choroidal veins (DCVs) at or around myopic macular neovascularizations (MNVs) and to determine whether there is a hemodynamic relationship between them.
Fifty-eight eyes of 57 patients with myopic MNVs were examined. Dilated choroidal veins were defined as choroidal veins whose diameter was 2X larger than adjacent veins. Indocyanine green angiography and swept-source optical coherence tomography images were reviewed to detect DCVs that crossed the subfoveal area. The filling sequence of the DCVs and MNVs was determined.
Patients' mean age was 71.4 ± 10.6 years. The mean axial length was 29.3 ± 1.8 mm. Dilated choroidal veins below or around the MNV were found in 17 eyes (29.3%). Emissaries of the short posterior ciliary arteries were seen at or around MNVs in 8 of the 17 eyes. In these eyes, the short posterior ciliary artery was filled first or almost simultaneously with the filling of the MNV, followed by a laminar filling of the DCVs. In one eye, afferent arterioles from the short posterior ciliary arteries and efferent venules connected to DCVs were seen.
Dilated choroidal veins are present below or around MNVs in about 30% of eyes with myopic MNVs. Our findings suggest that an MNV might be a vascular unit consisting of short posterior ciliary arteries, afferent arterioles, efferent venules, and DCVs.
研究近视性黄斑新生血管（MNV）处或其周围的脉络膜扩张静脉（DCV），并确定它们之间是否存在血流动力学关系。
对57例近视性MNV患者的58只眼进行检查。扩张的脉络膜静脉定义为直径比相邻静脉大2倍的脉络膜静脉。回顾吲哚菁绿血管造影和扫频光学相干断层扫描图像，以检测穿过黄斑下区域的DCV。确定DCV和MNV的充盈顺序。
患者的平均年龄为71.4±10.6岁。平均眼轴长度为29.3±1.8mm。在17只眼（29.3%）中发现MNV下方或周围有扩张的脉络膜静脉。在17只眼中的8只眼中，在MNV处或其周围可见睫状后短动脉的分支。在这些眼中，睫状后短动脉首先或几乎与MNV同时充盈，随后DCV呈层状充盈。在一只眼中，可见来自睫状后短动脉的传入小动脉和与DCV相连的传出小静脉。
在约30%的近视性MNV眼中，MNV下方或周围存在扩张的脉络膜静脉。我们的研究结果表明，MNV可能是一个由睫状后短动脉、传入小动脉、传出小静脉和DCV组成的血管单元。
