Effects of Platelet Rich Fibrin (PRF) in Treatment of Non-healing Sternum Wound After Open-heart Surgery

Inclusion Criteria: * The patient has been diagnosed with an acute STEMI or NSTEMI (confirmed by segment elevation (ST) changes on serial ECG, elevated troponin, coronary artery stenosis or occlusion identified by angiography, and a wall motion abnormality identified by angiography or echocardiography) * The patient is scheduled to undergo coronary artery bypass surgery. * The patient does not possess any contraindication for cardiovascular magnetic resonance (CMR). * The patient is capable of giving informed consent. * The patient is geographically accessible and willing to return for all follow-up investigations and clinical visits associated with study. Exclusion Criteria: * The patient is over the age of 65 years. * The patient has previous myocardial infarction (MI) (other than the qualifying event) and/or has scar or non-viable myocardium identified by CMR in any other left ventricular (LV) territory. * The patient is undergoing other cardiac surgery (i.e. concurrent cardiac valve, or aortic surgery). * The patient requires emergency surgery (i.e. operative intervention (CABG or ventricular assist device) within 24-hrs of assessment). * The patient has undergone previous cardiac surgery. * The patient's postsurgical life expectancy is less than 45 days, in the investigator's opinion. * The patient is of excessively poor baseline health, health-related quality of life, or physical functioning that would preclude a reasonable expected post-operative recovery. * The patient has received radiotherapy to the chest wall, is receiving immunosuppressive therapy, or is in any way immunocompromised.