Combination of mesenchymal stem cells and three-dimensional collagen scaffold preserves ventricular remodeling in rat myocardial infarction model

Table 4 Degrees of freedom (in vivo experiments)

Experiments		Degrees of freedom (F)
Cardiac function analysis	Parameters	Duration, 2 wk		Duration, 4 wk	Duration, 6 wk
	LVIDd	F4,25 = 1.936		F4,25 = 1.299	F4,25 = 3.594
	LVIDs	F4,25 = 9.060		F4,25 = 6.944	F4,25 = 14.008
	%EF	F4,25 = 26.475		F4,25 = 18.378	F4,25 = 24.089
	%FS	F4,25 = 35.299		F4,25 = 24.143	F4,25 = 26.754
	EDV	F4,25 = 1.571		F4,25 = 1.059	F4,25 = 3.601
	ESV	F4,25 = 3.44		F4,25 = 5.339	F4,25 = 9.580
	SV	F4,25 = 2.305		F4,25 = 0.477	F4,25 = 0.262
Immunohistochemistry	α-SMA	F4,10 = 31.551
Cell tracking	Fluorescence intensities of cardiac specific proteins
	cMHC		F = 1.631
	cTnI		F = 0.882
	cTnT		F = 2.665
	Fluorescence intensities of DiI labeled cells
	cMHC		F = 0.398
	cTnI		F = 0.089
	cTnT		F = 0.039

LVIDd: Left ventricular internal diameter diastole; LVIDs: Left ventricular internal diameter systole; EF: Ejection fraction; FS: Fractional shortening; EDV: End diastolic volume; ESV: End systolic volume; SV: Stroke volume; α-SMA: α-smooth muscle actin; cMHC: Cardiac myosin heavy chain; cTnI: Cardiac troponin I; cTnT: Cardiac troponin T.