1·Objective: To observe the influence of puerarin on haemodynamics in vascular cognitive impairment (VCI) patients.
目的：了解葛根素对血管性认知功能障碍(VCI)血流动力学的影响。
2·Secondary outcomes included cardiopulmonary haemodynamics, functional class, clinical worsening during follow-up, mortality and changes in B-type natriuretic peptide.
次要的结果包括心肺血流动力学、功能分级、随访期间的临床恶化，B型钠尿肽的死亡率和变化。