Are there any side effects or complications after CPR? There can be. The process of CPR can sometimes cause broken ribs or internal bleeding. Anyone who is successfully revived will remain unwell and need more treatment, usually in a specialist coronary care or intensive care unit. If you have a cardiopulmonary arrest with a pre-existing medical problem it is unlikely you will make a full recovery. In general, most people never recover to the same level of physical or mental health as before a cardiopulmonary arrest.