since no such role has yet been established for mammalian cardiac muscle small diameter ( less than or equal to 0.70 mm ) isolated kitten papillary muscles were stimulated at 24 x min-1 under isometric conditions in a physiological bath maintained at 30 degrees c with an oxygen tension of approximately equal to 450 mm hg ( 59.8 kpa ) to obtain a level of oxygenation just adequate to meet the metabolic needs of the muscles , as confirmed experimentally .
C0027061
cardiac muscle
C0030352
papillary muscles