[Age-related characteristics of the reaction of the myocardial adenyl system to pharmacological sympatholysis].

Rats aged 7, 30 days and 3-5 months were given intraperitoneally single doses (2.5 mg/kg) of reserpine. The content of the adenyl system compounds (ATP, ADP, AMP and inorganic phosphorus) was determined. It was shown that as regards the extent of ATP and ADP depression the 7-day old animals proved more sensitive to reserpine than were adult animals.