Electrical velocimetry demonstrates the increase in cardiac output and decrease in systemic vascular resistance accompanying cesarean delivery and oxytocin administration

摘要

Electrical velocimetry is a new type of impedance cardiography, which is easy to use and noninvasive. In 6 nonobstetric studies, electrical velocimetry correlated well with more established methods of measuring cardiac output (CO) such as thermodilution and echocardiography [1-6]. In obstetrics, electrical velocimetry has been used to measure the hemodynamic changes associated with intravenous (IV) magnesium sulfate, hydralazine, and labetalol in preeclamp-sia [7], IV indigo carmine during bladder repair [8], and during an episode of fetal heart rate (HR) deceleration associated with magnesium administration [71.