Concerning the history of comorbidities disease, this study showed that, more than half of the studied patients from both study and control group had no history of comorbidities disease. This could be related to a lot of the studied patients from both study and control group were young age. This finding is in line with Elkolaly et al., (2018), which about “Pulmonary affection after cardiac surgery”, who reported that, about only one quarter of the studied patients had a history comorbidities disease. But this finding disagrees with Olafiranye et al., (2011), which about "Management of Hypertension among Patients with Coronary Heart Disease", who reported that, the majority of the studied patients had hypertension and heart disease.