Relation between right ventricular enlargement, QRS duration, and right ventricular function in patients with tetralogy of Fallot and pulmonary regurgitation after surgical repair. - Abd-el-Rahman,M.Y.; Abdul-Khaliq,H.; Vogel,M.; Alexi-Meskishvili,V.; Gutberlet,M.; Lange,P.E. (Heart, 2000)