Ashman Phenomenon

Ashman phenomenon was first reported in 1947 as an aberrant ventricular conduction during atrial fibrillation. It occurs as a result of a change in the length of the QRS cycle. Ashman phenomenon has also been reported in atrial tachycardia and atrial ectopy. The commonest associated conduction abnormality is RBBB although association with LBBB has been documented. The condition is by itself asymptomatic and can be diagnosed by 12 lead ECG in most cases. It can easily be misdiagnosed as ventricular premature contraction. Management includes appropriate diagnosis and treatment of the cardiac disorders associated with it such as atrial fibrillation and atrial tachycardia. Isolated complexes do not require treatment