Liles, John T Age exacerbates chronic catecholamine-induced impairments in contractile reserve in the rat. [electronic resource] - American journal of physiology. Regulatory, integrative and comparative physiology Aug 2011 - R491-9 p. digital Publication Type: Journal Article ISSN: 1522-1490 Standard No.: 10.1152/ajpregu.00756.2010 doi Subjects--Topical Terms: Aging--physiologyAnimalsCardiotonic Agents--pharmacologyCatecholamines--pharmacologyDigoxin--pharmacologyDrug Administration ScheduleIsoproterenol--administration & dosageMilrinone--pharmacologyMyocardial Contraction--drug effectsRats