Sternotomy A sternotomy is an incision made through the sternum or breastbone. After surgery, it is important to watch out for your sternum, called "sternal precautions." The sternum is your breastbone that is divided to gain access to your heart during surgery. Surgical steel wires hold the sternum together after surgery after surgery. Over the next six to eight weeks, it is important to let the area heal. It may take two to three months for you breastbone to heal. Overexertion or straining the sternum before it heals increases the risk of opening, draining, and infections. Thoracotomy A thoracotomy is an incision made on the left or right side of the chest to gain access to your heart. Sternal and thoracotomy precautions Do not lift objects more than five to ten pounds No bending, pushing, pulling, and stretching for six to eight weeks Hold a pillow firmly against your upper chest when coughing or taking deep breaths Avoid placing pressure on your arms to support your upper body Keep your arms close to your body. Avoid extreme reaching with your arms. Do not place both hands behind your head Avoid twisting in your upper chest Do not drive for four to six weeks, or until cleared by your surgeon