Schüttler, K Threephasic contractions in mammalian myocardium. Isolation and identification of a late component. Implications for rested-state contractions. [electronic resource] - Biomedica biochimica acta 1989 - S558-64 p. digital Publication Type: Journal Article ISSN: 0232-766X Subjects--Topical Terms: AnimalsAtropine--pharmacologyCholine--pharmacologyGuinea PigsHeart--physiologyIn Vitro TechniquesIsoproterenol--pharmacologyMyocardial Contraction--drug effectsPotassium--metabolismSodium--metabolism