2006 Effects of off-pump versus on-pump coronary artery bypass grafting on early and late right ventricular function

Table 1 Right ventricular functional parameters following coronary artery bypass surgery.

Variable	Group	Pre-operatively	Post 6 days	Post 6 months	p value within group	p value between group
RVSVI (ml.m ^-2 )	OPCABG	49 ± 10	36 ± 7	46 ± 8	< 0.001	0.41
	ONCABG	49 ± 16	39 ± 11	51 ± 14	< 0.001
RVEF (%)	OPCABG	66 ± 6	59 ± 7	65 ± 8	< 0.001	0.46
	ONCABG	65 ± 8	61 ± 9	65 ± 7	0.03
RVEDVI (ml.m ^-2 )	OPCABG	74 ± 12	62 ± 9	72 ± 14	< 0.001	0.75
	ONCABG	75 ± 20	64 ± 16	76 ± 14	< 0.001
RVESVI (ml.m ^-2 )	OPCABG	25 ± 6	26 ± 6	26 ± 9	0.81	0.7
	ONCABG	26 ± 7	25 ± 8	26 ± 7	0.65
Heart rate (bpm)	OPCABG	62 ± 8	75 ± 12	64 ± 11
	ONCABG	60 ± 12	73 ± 15	65 ± 17

Results are presented as mean ± SD. Within group comparisons are made with one-way ANOVA, and between group comparisons are made with repeated measures ANOVA with post Hoc correction. RVEDVI, right ventricular end diastolic volume index (ml.m^-2); RVEF, right ventricular ejection fraction (%); RVESVI, right ventricular end systolic volume index (ml.m^-2); RVSVI, right ventricular stroke volume index (ml.m^-2);bpm, beats per minute.

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