Table 1.

Decreased cell length of cTnI-ND, but not cTnT-ND, cardiomyocytes with no change in cell width and resting sarcomere length

	Wild Type	cTnI-ND	cTnT-ND
Cell length, μm	124.53 ± 1.77	111.66 ± 5.67*	131.34 ± 3.32
Cell width, μm	25.51 ± 1.03	24.41 ± 0.52	24.94 ± 0.78
Sarcomere length, μm	1.82 ± 0.01	1.82 ± 0.01	1.80 ± 0.01

The resting length of young adult NH₂-terminal truncated cardiac troponin I (cTnI-ND) mouse cardiomyocytes was shorter than that of wild-type or NH₂-terminal truncated cardiac troponin T (cTnT-ND) cells (*P < 0.05). No significant difference was found in cell width and resting sarcomere length among the 3 groups. Data are means ± SE (n = 10 hearts for wild type and n = 5 hearts each for cTnI-ND and cTnT-ND groups). At least 100 cells from each heart were measured and pooled for statistical analysis.