title: The active and passive components of extravascular coronary resistance.
mesh_terms: D000818:Animals; D003331:Coronary Vessels / Q000502:physiology*; D004285:Dogs; D007545:Isoproterenol / Q000494:pharmacology; D014655:Vascular Resistance / Q000187:drug effects; D014661:Vasoconstriction
chemical_list: D007545:Isoproterenol