TABLE 2.

Interventricular contractile and cell dimension differences.

Contractility parameters	LV			RV		IVS
	n = 553			n = 711		n = 507
Baseline SL (μm)	1.710.07			1.700.07		1.700.08
Peak height (μm)	0.150.04	**		0.130.05	††	0.150.04
Fractional shortening (%)	8.72.6	**		7.82.7	††	8.82.5
Time to peak (ms)	88.420.5	*		80.020.0	††	85.218.9
Time to peak 80 (ms)	45.610.0	*		42.59.5	††	45.19.6
Time to peak 50 (ms)	27.46.3	*	#	25.75.8	††	27.66.4
Time to peak 20 (ms)	16.14.0		#	15.03.5	††	16.64.2
Contraction velocity (μm/s)	−4.61.9	*		−4.42.1	†	−4.82.0
80% Relaxation time (ms)	67.518.9		#	62.720.3		59.516.0
50% Relaxation time (ms)	46.713.9			42.814.5		41.312.2
20% Relaxation time (ms)	30.510.3			27.710.6		27.19.4
Relaxation velocity (μm/s)	3.41.6		#	3.31.7	††	3.81.7
Tau (ms–1)	38.225.2			34.921.4		35.925.2
Cell dimensions	LV			RV		IVS
	Width: n = 337			Width: n = 379		Width: n = 266
	Length: n = 210			Length: n = 259		Length: n = 164
Cell width (μm)	33.57.4	**		31.16.6		32.36.9
Cell length (μm)	102.019.0	*		97.718.0		97.014.8

Data are illustrated as mean ± SD. Significant differences are indicated by *p < 0.01 or **p < 0.001 for LV versus RV; ^#p < 0.01 or ^##p < 0.001 for LV versus IVS; ^†p < 0.01 or ^††p < 0.001 for RV versus IVS.