Cerebral Blood Flow Pulsatility Predicts the Cerebral Hyperperfusion Syndrome after direct revascularization surgery—A pilot study

Motivation: Little is known about cerebral hemodynamics after bypass surgery in patients with chronic arterial stenosis (CAS) and its role in the development of cerebral hyperperfusion syndrome (CHS). Goal(s): The purpose of this study was to explore the hemodynamic characteristics of patients with CAS and occlusion before and after surgery and its relationship with CHS. Approach: We used 4D flow MRI sequence to obtain the hemodynamic characteristics of patients with CAS and occlusion before and after bypass surgery. Results: Postoperative total cerebral blood flow increased and resistance index and pulsatility index decreased maybe a higher risk factor of CHS events in bypass surgery patients. Impact: This study provides a new insight into the hemodynamic characteristics of patients with chronic arterial stenosis, and holds a promising marker for marker for identifying CHS patients.