Table 1.

Comparison of Surface Architectures of Heart Matrix or Gelatin Containing Hydrogels

	Gelatin	Heart matrix
Concentration (mg/mL)	10	3.3	2.2	1.6	1.3
Diameter (mm)	12.2±0.1	9.9±0.2	11.1±0.2	11.85±0.2	12.0±0.1
Thickness (mm)	1.33±0.06	0.21±0.05	0.63±0.13	1.38±0.15	1.52±0.10
Circularity (%)	84±8	82±6	81±6	82±7	82±7

Heart matrix hydrogels had smaller diameter, thickness, and volume after the lyophilization process compared with gelatin containing hydrogels. There was significant changes in diameter and thickness of heart matrix composite hydrogels as amounts of heart matrix decreased (p>0.05, n=8). There was no significant effect of different concentrations on circularity of heart matrix hydrogels (p>0.05, n=8).