Acute systemic inflammatory response after cardiac surgery in patients infected with human immunodeficiency virus using clinical and inflammatory markers.

Background: Immediate post-cardiopulmonary bypass (CPB) immune responses and organ injuries in immune-compromised patients remain poorly documented.
Method: Sixty-one consecutive patients (30 HIV seropositive and 31 seronegative), undergoing elective cardiac valve(s) replacement were enrolled, from a single center hospital, after informed consent was obtained. C-reactive protein (CRP) and Erythrocyte sedimentation rate (ESR) were used as biomarkers of acute inflammatory response.
Results: The mean age was similar between the HIV seropositive and negative group. Pre-operatively, CRP (p=0.388) and ESR (p=0.817) were comparable. The CPB events and durations were significantly different between the two groups: duration (p=0.021), clamp aortic duration (p=0.026), bloodtransfusion (p=0.013), total urine output (p=0.035) and peak lactate (p=0.040). Post-operatively, there was significant increased biomarkers level in both groups, albeit not between the groups with a significant negative correlation between the mean change in CRP levels and mechanical ventilation (r=0.548, p=0.002) in the seropositive group (r=0.025, p=0.893). The correlation between pre-operative and post-operative difference in CRP and ICU stay was not significant in both groups. A significant drop (p=<0.001) in CD4 cells was documented post-operatively in the HIV seropositive group.
Conclusion: HIV positive patients’ post-operative reactions to cardiac surgery supported by CPB are similar to those of HIV seronegative patients.

Keywords
Cardiopulmonary bypass (CPB); Human immunodeficiency virus (HIV); inflammation