Table 2.

Myofibrillar functions in saponin permeabilized cardiac fibres

	Sham	HF	P*
Active tension (mN mm−2)	37 ± 2	29 ± 2	<0.001
	(n= 22)	(n= 23)
Resting tension (mN mm−2)	4.9 ± 0.8	16.8 ± 2.1	<0.001
	(n= 22)	(n= 23)
pCa50	5.82 ± 0.01	5.83 ± 0.01	NS
	(n= 12)	(n= 13)
nH	4.8 ± 0.2	4.3 ± 0.1	NS
	(n= 12)	(n= 13)

Values are mean ±s.e.m.; pCa₅₀: pCa for half-maximal tension development. n_H: Hill coefficient; NS: non significant.

^*Statistical differences between HF and sham values. n= number of fibres.