Normal heart rate and rhythm were then preserved temporarily with digoxin and flecainide .
Direct fetal administration of adenosine for the termination of incessant supraventricular tachycardia. Adenosine terminates supraventricular reentry tachycardia safely and effectively in the pediatric age group. ### case The recurrence of pretreated incessant tachycardia led to severe hydrops in a 28-week-old fetus. The tachycardia was terminated instantly with direct fetal administration of adenosine via the umbilical vein. Normal heart rate and rhythm were then preserved temporarily with digoxin and flecainide . ### conclusion Direct fetal adenosine administration might be helpful in the treatment of fetal reentry tachycardias if the sinus rhythm achieved quickly can be preserved by long-acting antiarrhythmic drugs. Such a combined therapeutic approach might be especially advantageous in hydropic fetuses.
### Instruction:
            Given the context about compound efficacy for the given treatment mentioned within the input, mentioned the compounds 
            that can co-occur for the mentioned treatment

            ### Input:
            Direct fetal administration of adenosine for the termination of incessant supraventricular tachycardia. Adenosine terminates supraventricular reentry tachycardia safely and effectively in the pediatric age group. ### case The recurrence of pretreated incessant tachycardia led to severe hydrops in a 28-week-old fetus. The tachycardia was terminated instantly with direct fetal administration of adenosine via the umbilical vein. Normal heart rate and rhythm were then preserved temporarily with digoxin and flecainide . ### conclusion Direct fetal adenosine administration might be helpful in the treatment of fetal reentry tachycardias if the sinus rhythm achieved quickly can be preserved by long-acting antiarrhythmic drugs. Such a combined therapeutic approach might be especially advantageous in hydropic fetuses.

            ### Response:
            digoxin, flecainide
            