What factors improve the rate of successful transesophageal cardioversion?
Normal-size left atria (Giardot et al, Potapenko et al, Chabert et al), Tachyarrhythmias with more recent onset (Giardot et al, Chabert et al, Guarnerio et al), Atrial flutter having longer cycle lengths (Doni et al, Zubrin et al), Pre-administration of antiarrhythmia drug (e.g. propafenone often prolongs flutter CL) (Doni et al, Rhodes et al, D’Este et al, Matiouchine et al, Potapenko et al).