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[Estrogenic action of cardiac glycosides. Clinical and animal experiment studies].

Vaginal smears of young girls before puberty and of postmenopausal women who were treated with digoxine, were examined on their degree of proliferation. There was no sign of any estrogenic stimulation. In female juvenile and ovarectomized fertile rats digitoxin caused no ripening of the vaginal epithelium neither in low nor in high doses. It is supposed that some steroid-hormone-like effects which are seen by glycoside-therapy, are related to stimulation of the suprarenal gland.

Age Factors↗

Drug interactions with cardiac glycosides: evaluation of a possible digoxin-ethmozine pharmacokinetic interaction.

Problems in studying pharmacokinetic interactions with digoxin were evaluated using as a test model the examination of a possible interaction between digoxin and ethmozine in a group of 11 patients with cardiac disease. A single-blind, placebo-controlled, nonrandomized protocol design was used. Considerable intrapatient variability in day-to-day serum digoxin levels was documented that could not be accounted for by laboratory variability in digoxin assay measurements (mean coefficient of variation 10.1%) or alterations in blood urea nitrogen (BUN), serum creatinine, or body weight during the course of the study. No consistent, statistically significant alteration of mean serum digoxin levels occurred when the baseline, placebo, and ethmozine phases were compared, although the study design would have permitted detection of a 0.29-ng/ml alteration in mean serum digoxin levels. A discussion of the sources of variability in digoxin levels is provided.

Aged↗

[The effect of beta-receptor blockers and cardiac glycosides on the heart rate, systolic blood pressure and ST interval in submaximal ergometer exertion].

14 males at the age of 49 +/- 6.4 years with condition after myocardial infarction were loaded on the bicycle ergometer according to the criteria of the WHO. After injection of a beta-receptor blocker at the submaximal functional level the product of the pressure frequency decreased by 25% and the watt-pulse increased by 17%. The oxygen pulse and the respiratory quotient remained constant. An additional injection of glycosides did not significantly change these parameters. At the same time no falsely positive evidence concerning the behaviour of the ST-distance as criterium of withdrawal was provoked. The results of the submaximal and symptom-limited function were not falsified in the therapy with beta-receptor-blockers and glycosides, when the criteria of withdrawal recommended by the WHO are used unchangedly.

Adult↗