“…[10][11][12][13] Briefly, the hemodynamic monitor (Aesculon, Osypka Medical, Berlin, Germany) measures changes in thoracic electrical bioimpedance during left ventricular ejection period, allowing for determination of SV, CO, CI based on the Bernstein-Osypka-formula, taking into account that the EV is affected by weight, height and heart rate. The measurements are easy to perform, requiring 4 standard surface adhesive electrocardiogram sensors positioned on the left side of the neck (n = 2) and on the lateral thorax (n = 2).…”