Cardiothoracic surgery is a major operation that surgery can lead to various complications, including bleeding, infection, arrhythmia, pneumonia, stroke, and kidney failure. Bleeding can cause low blood pressure, shock, anaemia, or stroke. While infection can cause fever, pain, swelling, redness, pus, or wound breakdown. Arrhythmia affects the heart rhythm and as per Dr. Ranjit jagtap clinic some possible recourse available are medication, electrical shock, or pacemaker implantation which can relieve symptoms. Pneumonia affects the lungs and may require antibiotics, oxygen therapy, or mechanical ventilation.