Effect of Sedative Agent on Reducing the Frequency of Arrhythmia in the Patients After Cardiac Surgery

Inclusion Criteria: * Multi vascular lesions of the coronary arteries according to coronary angiography; * Heart valve damage was confirmed by heart ultrasound, which is subject to surgical correction (aortic stenosis of III degree with a gradient on the aortic valve of more than 42 mmHg, aortic insufficiency III, mitral valve stenosis II-III, mitral regurgitation II-III) * Age of patients from 18-80 years; Exclusion Criteria: * Refusal to participate; * Hypersensitivity to propofol, dexmedetomidine; * Acute renal failure that occurred during surgery (ClCr less than 50 ml / h, or a decrease in the rate of diuresis to 0.1 ml / h in the first 4 hours after surgery and does not respond to diuretic therapy)