Figure 1

Mean right ventricular stroke volume index (RVSU) and 95% confidence intervals measure preoperatively, at 6 days post-operatively and at 6 months. *Denotes result using ANOVA for repeated measures with Post Hoc analysis to make overall comparisons between the 2 surgical techniques. † denotes one way ANOVA used to make within group comparisons, indicating a significant effect of surgery (both types) on early right ventricular function. OPCABG, off-pump coronary artery bypass; ONCABG, on-pump coronary artery bypass surgery.