Abstract
Summary
Cardiac glycogen concentration decreases significantly in rats within 6 hr after adrenalectomy, and gradually decreases further over the next 18 hr. Superimposed upon these decreases are diurnal variations which reach a peak in the morning (8 to 11 a.m.) and decline to a low point in the evening (8 to 11 p.m.). Dexamethasone (200 μg) significantly increases the cardiac glycogen concentration 67% within 2-4 hr after injection and completely restores the glycogen concentrations to normal levels within 24 hr.
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