Bohdiewicz P, Juni J E
Nuclear Medicine Department, William Beaumont Hospital, Royal Oak, Michigan 48073-6769.
Clin Nucl Med. 1994 May;19(5):452-4. doi: 10.1097/00003072-199405000-00017.
A 75-year-old man who had a small right parietal infarction 8 months earlier underwent baseline and acetazolamide enhanced Tc-99m hexamethylpropylene amineoxime brain SPECT imaging. The acetazolamide study demonstrated a bilaterally symmetric perfusion deficit posteriorly near the midline. The baseline study was essentially normal. This finding was felt to represent watershed ischemia at the junction of the anterior circulations (anterior cerebral and middle cerebral arteries) and the posterior circulation (posterior cerebral artery). Carotid arteriography subsequently demonstrated left subclavian steal syndrome with retrograde flow through the left vertebral artery.
一名8个月前发生右顶叶小梗死的75岁男性接受了基线和乙酰唑胺增强的锝-99m六甲基丙烯胺肟脑单光子发射计算机断层扫描（SPECT）成像。乙酰唑胺检查显示中线附近双侧对称的灌注缺损。基线检查基本正常。这一发现被认为代表前循环（大脑前动脉和大脑中动脉）与后循环（大脑后动脉）交界处的分水岭缺血。随后的颈动脉造影显示左锁骨下动脉盗血综合征，有逆行血流通过左椎动脉。
