IJCS | Volume 31, Nº3, May/ June 2018

285 Chart 3 - Description of Results Author Year Results Conclusions Braždžionyt ė and Macas 7 2007 Compared statistically, in 34 patients, based on graphical techniques and simple calculations, two methods: the Swan- Ganz (recognized and accepted as a "Gold standard" for hemodynamic monitoring) and impedance cardiography (newly introduced method). It was presented an alternative approach, suggested by DG Altman and JM Bland, for cardiac output measurement simultaneously in patients with acute myocardial infarction. Bland-Altman analysis is an alternative approach for evaluation of agreement between two methods for clinical measurement. According to data, it is a noninvasive technique. Impedance cardiography is a reliable method for hemodynamic monitoring in cases of acute myocardial infarction without complications. Engoren and Barbee. 8 2005 Determined the accuracy of cardiac output (CO) assessment through bioimpedance, thermodilution and Fick methods. In a sample of 46 patients, 15 used the Flick method. Mean (SD) cardiac output in all patients was 6.3 (2.2) L/min by thermodilution and 5.6 (2.0) L/min by bioimpedance. In the 15 patients in whom all 3 methods were used, mean cardiac output was 6.0 (1.7) L/min by thermodilution, 5.3 (1.7) L/min by bioimpedance, and 8.6 (4.5) L/min by the Fick method. The determinations of CO using the three techniques are not interchangeable in a heterogenous population of critically ill patients. Measurements of cardiac output by thermodilution were significantly greater than by bioimpedance. But for each subject, the bioimpedance method varied less than the thermodilution method varied. Silver et al. 9 2005 The hypothesis was that ICG could decrease the need for placement of a pulmonary artery catheter in critically ill patients in coronary care units (CCU). After evaluating the need for hemodynamic monitoring of 107 patients admitted to the CCU, 14 were judged to have indications, and all patients were monitored by ICG. ICG parameters were provided to the attending physician who then decided whether pulmonary artery catheter insertion was still necessary. 10/14 patients (71%) were monitored only by bioimpedance and clinicians reported that the information was helpful in 10/10 patients (100%; 95% confidence interval, 74.1%–100.0%). ICG can replace the pulmonary artery catheter in coronary care unit and clinicians utilizing ICG believe it aids medical decision- making and improves patient outcomes. The benefits of pulmonary artery catheter (PAC) may not justify the risks associated with invasive hemodynamic monitoring, such as the potential for infection and other complications associated with a catheter. Although ICG does not provide pulmonary artery pressure, it does provide reliable and reproducible measures of cardiac index, stroke volume, systemic vascular resistance, and other hemodynamic parameters. Total Procedure Cost – PAC 2165$ / ICG – 34$ Chen et al. 10 2014 Evaluated with impedance (ICG) the cardiac function of 99 acute myocardial infarction patients. Blood was obtained for the detection of BNP, NT-proBNP and troponin, followed by ICG, which measured: Thorax fluid capacity (TFC); pre-ejection period (PEP); left ventricular ejection fraction (LVEF); cardiac output (CO); stroke index (SI); stroke volume (SV); systemic vascular resistance (SVR); systemic vascular resistance index (SVRI); cardiac index (CI); end-diastolic volume (EDV); systolic time ratio (STR). All these patients underwent ICG and echocardiography 2 days after surgery. The results indicate that NT-proBNP and BNP are associated with SVR, SVRI, PEP and STR, independently (P < 0.05). Troponin was associated with SVR and SVRI (p < 0.05). ICG data could reflect the early cardiac functions of AMI patients, but the accuracy of ICG in evaluating cardiac functions should be combined with detection of blood NT-proBNP, BNP and cTnT and echocardiography. Silva et al. Impedance cardiography in myocardial infarction International Journal of Cardiovascular Sciences. 2018;31(3)282-289 Review Article