A 27-week fetus with severe nonimmune @entity4 was found to have a reciprocating @entity591 with the rate of 275 beats per minute. @entity7310 produced improvement without conversion. Large doses of @entity1169 were without effect. Twelve days later @entity5126 was added, and conversion to sinus rhythm occurred after only two hours and persisted to term. The @entity1 has no @entity299 . Literature review confirms digoxin as the first choice for treatment of fetal reciprocating @entity591 , with excellent transplacental passage. @entity1169 has not been demonstrably effective, and has poor placental passage. @entity1855 also produced poor cord blood levels in two trials. Placental passage for @entity1818 is uncertain, but long-term use has been unsatisfactory. @entity5126 is recommended as the second drug for treatment of resistant fetal tachyrhythmias.

@entity4 from reciprocating @entity591 in a 27-week fetus requiring XXXX for conversion.

@entity1169 :: ('MESH:D011433', 'Chemical') :: ['propranolol', 'Propranolol'] @entity1 :: ('9606', 'Species') :: ['infant'] @entity1818 :: ('MESH:D011342', 'Chemical') :: ['procainamide'] @entity4 :: ('MESH:D004487', 'Disease') :: ['hydrops'] @entity1855 :: ('MESH:D014700', 'Chemical') :: ['Verapamil'] @entity591 :: ('MESH:D013610', 'Disease') :: ['tachycardia', 'atrioventricular tachycardia'] @entity5126 :: ('MESH:D011802', 'Chemical') :: ['Quinidine', 'quinidine'] @entity299 :: ('MESH:D006331', 'Disease') :: ['heart disease'] @entity7310 :: ('MESH:C536469', 'Disease') :: ['Maternal digitalization']
@entity5126 :: (MESH:D011802,Chemical) :: ['quinidine']
