Background: Reliability and comparability to cardiometry-estimated stroke volume fluctuation have been shown for ultrasound-guided IVC diameter variation with respiration as a predictor of volume responsiveness. The repeatability and low inter-operator variability of intravascular ultrasonography make it an ideal tool for reassessing intravascular volume after the delivery or removal of volume. Electrical cardiometry (EC) uses four skin electrodes to assess changes in thoracic impedance or resistance. EC is able to separate the impedance variations that occur during the cardiac cycle. In order to better treat critically sick septic patients with hemodynamic instability, this review paper seeks to evaluate the accuracy of fluid responsiveness evaluation using non-invasive cardiometry to ultrasound guided IVC collapsibility. In summary: Patients experiencing septic shock were more likely to have a poor prognosis if their fluid balance was positive. When evaluating the intravascular volume state of critically ill patients, the inferior vena cava collapsibility index may provide useful recommendations without invasive procedures. Fluid management decisions in severely sick patients may benefit from advanced hemodynamic monitoring using EC. If EC can continue to track CO trends, it might be useful for clinical decision-making in identifying sudden shifts in the gas. Since EC is non-toxic and simple to implement, this should form a significant portion of future studies.