Background: In patients with ASDs There're significant LA remodeling as result of chronic LA stretch and dilatation which occurs in addition to the longstanding right atrial volume overload. These structural changes result in electromechanical and electrophysiological changes. The prolonged atrial electromechanical delay also the non-hemogenous spread of sinus impulse which represented as dispersion in P wave duration are considered electrophysiological characteristics atrial fibrillation.
Aim: to compare atrial electromechanical delay by means of tissue doppler echocardiography and P wave dispersion on surface ECG before and three months after transcatheter ASD closure.
Patients and methods: we prospectively evaluated the short-term effect of transcatheter closure of secundum ASD patients on electromechanical delay by tissue doppler echocardiography and on P wave dispersion by surface ECG.
Results: There was significant increase in LVEDD and LVESD after device closure (P value