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If the patient is resistant to blood thinners after the stent is placed in the heart or if the patient continues his/her life as before the stent was placed, the stent will clog very early. In this case, the patient will need heart surgery, namely bypass surgery. If the patient's sternum is opened during heart surgery and the patient does not show the necessary care, the sternum will not close completely and will start to get infected over time. This condition is called MEDIASTHENITIS. Mediastenitis requires serious treatment and, if necessary, a repeat surgery. If this is not done, the outcome can be fatal.