摘要：This study was designed to evaluate the hemodynamic effect of norepinephrine (NE) on the peak systolic velocity (PSV), diameter, and blood flow of the common carotid artery (CCA) using the point-of-care ultrasound (POCUS) in patients with septic shock. The study involved patients above 18 years old with septic shock. Arterial monitoring, carotid ultrasonography, and transthoracic echocardiography were performed before NE administration (T
0). When the mean arterial pressure exceeded 65 mmHg after NE administration (T
1), the measurement was repeated. Twenty-four patients (median age 67 [interquartile range: 54–77
