1. Procaine amide completely protected the dog heart in situ against electrical induction of
auricular fibrillation. It also produced a marked rise in the threshold for multiple firing and …

Phosphorylase activity in heart and brain was determined after treatment of intact rats with
several agents affecting the central nervous system. Reserpine decreases the percentage of …

Content of glucose-6-phosphate in heart was determined after treatment of intact cats with
cardiotonic agents. Epinephrine, norepinephrine, and isoproterenol significantly increase the …

THE OBSERVATION was made by Sir Edward Mellanby 1 that dogs maintained on a diet of
which the whole wheat portion had been treated with nitrogen trichloride (agene®) exhibited …

Glycogen synthetase activity in the heart was determined after treatment of intact cats with
cardiotonic agents in an attempt to test certain hypotheses : 1) whether, in the case of heart …

The inotropic effects of twelve pure "cardiac glycosides" upon isolated hypodynamic myocardium
have been compared. The over-all comparison agrees closely with results reported for …

METHOD. The technic used for determining the excitability of the heart at intervals
throughout the cardiac cycle was similar to that described previously(Suckling et al.,

METHODS Mongrel dogs ofboth sexes were used. Midbrain decerebration (Kao, Schlig,
and Brooks, 1955) was performed under thiopentone sodium (25 mg./kg. iv) anaesthesia, …

Eighteen, 48 and 96 hour periods of starvation lead to a progressive, marked decline in both
total and independent, active “I” form of glycogen synthetase in the rat heart. The relative …

Phosphorylase activity was determined in a variety of experimental conditions affecting
force of contraction of cardiac muscle. In the isolated guinea pig auricle calcium and K-…