The P wave in atrial septal defect.
D054087:Atrial Septum; D004562:Electrocardiography; D006330:Heart Defects, Congenital; D006344:Heart Septal Defects, Atrial; D006346:Heart Septum; D006801:Humans
ELECTROCARDIOGRAPHY; HEART DEFECTS, CONGENITAL; HEART SEPTUM ATRIAL