Fluid Responsiveness With Passive Leg Raising in Patients Undergoing Coronary Artery Bypass Surgery

Inclusion Criteria: A total of 50 patients undergoing elective coronary artery bypass surgery under general anesthesia in the Cardiovascular Surgery operating room of the Ministry of Health Ankara Bilkent City Hospital will be included in the study. The volunteers to be included will be patients aged between 18 and 80 years, evaluated as ASA class II-III according to the American Society of Anesthesiologists (ASA) classification. Exclusion Criteria: Patients who do not wish to participate in the study Patients younger than 18 or older than 80 years Patients with an ASA score greater than III Patients with BMI \> 35 Patients with EF \< 40% Patients with atrial fibrillation Patients with severe valvular stenosis or insufficiency Patients with right ventricular dysfunction Patients with carotid artery stenosis Patients with a history of cerebrovascular accident or transient ischemic attack Patients with increased intra-abdominal or intracranial pressure Patients with glaucoma Patients with severe renal or hepatic disease Patients who develop hemodynamic instability during the perioperative period Pregnancy