Table 1.

Comparative analysis of LV function between groups at baseline and at 6 wk after MI

		Operator-driven instructions	Standardized protocol	P
Baseline	End-diastolic volume (mL)	49 ± 8	50 ± 8	0.80
	End-systolic volume (mL)	20 ± 4	22 ± 4	0.11
	Ejection fraction (%)	60 ± 3	55 ± 3	0.26
6 wk after MI	End-diastolic volume (mL)	79 ± 21	71 ± 15	0.26
	End-systolic volume (mL)	48 ± 19	45 ± 11	0.56
	Ejection fraction (%)	41 ± 8	38 ± 7	0.26