Study objective: The present study was carried out to study the effect of certain modes of mechanical ventilation on haemodynamics and 02 transport in the immediate post-operative coronary patients undergoing CABG Design : Prospective cohort study. Settings : Intensive Care Unit of the National Heart Institute, Egypt. Patients : 18 coronary patients indicated for elective CABG. interventions: Cardiac catheterization, radial artery cannulation and SwanGanz catheter insertion were done pre-operatively. Post-operatively, patients were put on mechanical ventilation; CMV, SIMV + PPS then SIMV modes sequentially. Main results: Compared to other modes, SIMV mode showed favourable haemodynamic effects in the form of improved CO and SV. However, RCW was increased. SIMV + PPS, athough-improved oxygenation (low Qs/Qt), didn't lead to improved 02 AV due to its negative effect on CO. Conclusion: SIMV may be a better mode of mechanical ventilation regarding its positive effect on haemodynamics. SIMV + PPS is a suggested weaning mode for patients who are haemodynamically stable and have intact ventilatory drive.
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