Sultan M, Ullah M, Sadiq N, Akhtar K, Ahmed S. DIAGNOSTIC CARDIAC CATHETERIZATION IN PATIENTS OF TETRALOGY OF FALLOT - PROGRADE VS. RETROGRADE APPROACH. Pak Heart J [Internet]. 2013Jun.13 [cited 2024Nov.23];46(1). Available from: https://pakheartjournal.com/index.php/pk/article/view/611