Pain is an unpleasant subjective and multidimensional experience related to actual or potential tissue damage. Intensive care unit (ICU)-admitted patients experience pain because of the painful interventions and routine daily care procedures. The aim of this study was to evaluate convergence between these two tools for pain assessment and their consistency with hemodynamic changes due to pain in tracheal intubated patients after cardiac surgery This was a prospective study was conducted on 50 patients who had undergone cardiac surgery and met the necessary criteria for the research. Pain score at 24hr after extubation Secondary outcomes - Postoperative opioid consumption (in first 24 hrs), Intraop, postoperative, totalPatient satisfaction with pain management score: in the first 24 hrs measured at above intervals.Our study shows that the 38% of the studied patients were with mild pain and 52% showed moderate to severe pain according to facial expression tool for pain assessment. Our study shows that the 70% of the studied patients were with moderate to severe pain according to COMFORT too scale for pain assessment. our study shows that a highly significant moderate level of agreement was observed According to high correlation between the pain score measured by comfort scale and facial expression , both scales could be used successfully for monitoring of pain in critically ill patients. Both scales are sensitive for capturing changes in pain response and discriminate between painful and nonpainful procedures .