Sultan, M., Ullah, M., Sadiq, N., Akhtar, K. and Ahmed, S. 2013. DIAGNOSTIC CARDIAC CATHETERIZATION IN PATIENTS OF TETRALOGY OF FALLOT - PROGRADE VS. RETROGRADE APPROACH. Pakistan Heart Journal. 46, 1 (Jun. 2013). DOI:https://doi.org/10.47144/phj.v46i1.611.