Use of flecainide for refractory atrial tachycardia of pregnancy

Sustained arrhythmias during pregnancy are uncommon. However, when they do occur, atrial tachycardias are usually amenable to pharmacological or electrical therapy. We describe a case of sustained atrial tachycardia in a pregnant patient. The tachycardia was resistant to commonly used antiarrhythmic drugs and to cardioversion but rapidly responded to flecainide, with return to sinus rhythm until the patient was delivered of a healthy baby.