The heart is a hollow muscular organ placed in the chest wall. It consists of two atria and two ventricles. The heart is built of three layers: endocardium, pericardium, and myocardium. The heart artery system consists of the right and left flanking coronary arteries. The heart delivery system consists of knots and bondless. It begins with the sympatric node, continues on the atrioventricular node and ends with Hissov beam. During cardiac surgery, the heart rate often has to stop and move to the extracorporeal circulation. In cardiac valve surgery, the valve is repaired or completely removed and replaced by artificial valve. The gold standard in surgical treatment of coronary heart disease is revascularization using the extracorporeal circulation machine. The choice of conductor was crucial, and the best conductor was the internal thoracic artery. Patients who have undergone cardiac surgery will require continuous monitoring and interventions for mechanical ventilation, cardiovascular maintenance and metabolic stability and other advanced levels of care. Nurses and medical technicians typically spend the most time with patients. This allows the nurse or medical technician to actively observe the patient, notice any changes, and to inform the doctor these changes. The doctor will then evaluate the symptoms and advise the nurse the appropriate prescribed therapy to administer. It is very important for nurses to know signs and symptoms of hemodynamic disorders. This will include practical knowledge on how to read the various parameters from monitoring devices.