recordings were made from normal canine cardiac purkinje fibers in major false tendons , from normal purkinje fibers partially depolarized by treatment with tyrode 's solution containing 7 mmol/l potassium chloride , from subendocardial purkinje fibers of the left ventricle of normal hearts , and from subendocardial ventricular muscle preparations .
C0018787
cardiac
C0225897
of