title: Rhythm-dependent role of different calcium stores in cardiac muscle: X-ray microanalysis.
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism*; D004577:Electron Probe Microanalysis; D006168:Guinea Pigs; D066298:In Vitro Techniques; D009200:Myocardial Contraction; D010210:Papillary Muscles / Q000502:physiology*
chemical_list: D002118:Calcium