Repolarization of the rabbit cardiac ventricles after in increase of potassium concentration in the plasma.

The sequence of ventricular epicardium repolarization in rabbits with hypokalemia is directed from the apex of the heart to its base in accordance with distribution of local repolarization intervals. Under conditions of hyperkalemia, the propagation of excitation wave is inhibited without changes in its sequence; while the duration of repolarization decrease mainly in zones where it was initially long (the base of the right ventricle), as a result of which the distribution of local repolarization intervals becomes more uniform and a relationship between the repolarization and activation sequences is formed.

Effect of liposomal tetracycline hydrochloride on enzymatic function of the liver.

Preparation and physicochemical properties of liposome-incorporated tetracycline are described. Comparison of the effects of tetracycline hydrochloride in free and liposome-incorporated forms on enzymatic functions of the liver showed that immobilization of the antibiotic into liposomes protects liver cells from functional disturbances.

[Experimental study on the therapeutic effect of liposome-entrapped antibiotics in the treatment of destructive pneumonia].

The data on preparation of liposome-entrapped gentamicin sulfate and cefoperazone and their investigation on albino mice with staphylococcal destructive pneumonia are presented. Comparative study of the efficacy of gentamicin sulfate and cefoperazone in free and liposome-entrapped forms showed that immobilization of the antibiotics in phospholipid vesicles provided a 2-fold increase of their efficacy.