My father 70yr, diagnosed ventricular bigeminy. Is it dangerous? Can amiodarone help controlling it? Treatment options for ventricular tachycardia?

Depends. The underlying cause for the rythm needs to be worked up and treated. If all correctable conditions are fixed., then eps may be indicated and ablation if reasonable. A defibrillator if poor heart function. Otherwise amio is reasonable but has its issues. It can affect the lungs, liver and thyroid to mention a few. Close monitoring is reccomended.