慢性脑血管功能不全(CCVI)是指各种原因导致慢性持续性脑血流低灌注,引发脑组织缺血缺氧而出现头痛、头晕、失眠、认知功能损害等一系列脑部功能障碍的疾病。CCVI伴发于多种脑血管疾病的病理过程中,最终可能导致持久性或进展性的认知与神经功能障碍,是血管性认知障碍发生、发展的重要因素。对其发病机制、病理生理学以及影像学研究具有重要的临床意义。就CCVI的发病机制、临床特点以及影像学诊断进行综述。 Chronic cerebrovascular insufficiency (CCVI) refers to a variety of causes leading to chronic persistent cerebral hypoperfusion, brain ischemia and hypoxia caused by a series of brain dysfunction such as headache, dizziness, insomnia, cognitive impairment disease. CCVI is associated with many pathological processes of cerebrovascular diseases, which may eventually lead to persistent or progressive cognitive and neurological dysfunction. It is an important factor in the occurrence and development of vascular cognitive disorders. Its pathogenesis, pathophysiology and imaging studies have important clinical significance. The pathogenesis of CCVI, clinical features and imaging diagnosis are reviewed.