A patient with ciliary arrhythmia was prescribed digoxin. What mechanism of action of this medicine results in its antiarrhythmic effect?

Варіанти відповіді

1. Increased potassium concentration in the cardiomy°Cytes
2. Decreased permeability of the cell membrane to sodium
3. Decreased sympathetic influences
4. Inhibition of Na, K-ATPase
5. Decreased permeability of the cell membrane to calcium