Phase Angle, Lean Body Mass Index and Tissue Edema and Immediate Outcome of Cardiac Surgery Patients

The study protocol-mandated baseline data will include demographics, comorbidities, EuroSCORE\[European System for Cardiac Operative Risk Evaluation\] II, C-reactive protein, left ventricular ejection fraction (by transthoracic echocardiography) and peak expiratory flow rate (assessed by spirometry). Physical performance status will be assessed by APACHE \[Acute Physiology And Chronic Health Evaluation\] II score. Furthermore, SOFA \[Sequential \[Sepsis-related\] Organ Failure Assessment\] score will be assessed preoperatively and up to 7th postoperative day. Preoperatively and on the 7th postoperative day, the following parameters will be calculated or measured and then recorded: * Anthropometric data including body height, weight and waist circumference measurement, estimation of waist/circumference ratio and calculation of body mass index \[BMI\]. * Nutritional status will be assessed by MUST\[Malnutrition Universal Screening Tool\] score * Body composition analysis using bioelectrical impedance analysis \[BIA\], will be performed for the calculation of FFM \[fat-free mass\] and fat mass \[FM\] indicators, intracellular, extracellular and total water \[ICW, ECW, TBW\] and phase angle parameter \[PhA\]. Additionally, muscular power will be assessed by handgrip strength \[HGS\], the upper third triangle perimeter and skin fold thickness will be measured. * Daily calorie and protein needs of each patient will be calculated During hospitalization, the following parameters will be recorded: * Type of diet \[parenteral, intestinal, oral\] * Post-operative infections involving respiratory system, medieval space, sternum trauma, lower limb trauma (if present) and endocarditis. * The occurrence of organ dysfunction or sepsis. Sepsis is defined as a life-threatening organ dysfunction caused by a dysregulated host response to infection. For clinical operationalization, organ dysfunction will be represented by an increase in the Sequential \[Sepsis-related\] Organ Failure Assessment (SOFA) score of 2 points or more, which will be associated with an in-hospital mortality greater than 10%. * Thromboembolic events such as stroke, peripheral venous thrombosis and pulmonary embolism. * Acute renal failure. * Re-operation for bleeding. * Need for inotropic or vasoactive support. * Hospitalization data (intubation\> 24 hours, duration of mechanical ventilation and ICU stay, duration of hospital stay, in-hospital mortality