Table 1.

Overview of the relevant baseline parameters of the two different models. This table represents the most relevant parameters obtained from the two types of biomarkers (electrophysiology and contractility). Cycle length (Cl), rise time (Trise), action potential duration (APD) at 30% and 50%, contractility amplitude (CtAMP) and contractility duration at 50% amplitude (CtD50).

Culture	CL (ms)	Trise (ms)	APD30 (ms)	APD90 (ms)	CtAmp (AU)	CtD50 (ms)
FM	1457 ± 7.7	7 ± 0.1	217 ± 1.4	483 ± 2.6	650 ± 2.9	351 ± 2.3
MM	1343 ± 6.9 *	6 ± 0.1 *	234 ± 1.1 *	450 ± 2.4 *	312 ± 4.7 *	348 ± 1.5

The data are expressed as mean ± SEM (* p < 0.01) n = 568 wells (FM) and n = 574 wells (MM). All parameters apart from contraction duration were significantly different between experimental groups. The monolayer on fibronectin matrix: FM and the monolayer on Matrix Plus: MM.