THE FREQUENCY OF ARRHYTHMIAS AMONG CHILDREN WITH CONGENITAL HEART DISEASE PRESENTING AT A TERTIARY CARE HOSPITAL OF LAHORE, PAKISTAN. FMHR [Internet]. 2024 Dec. 30 [cited 2026 Jun. 1];2(4):118-25. Available from: https://fmhr.net/index.php/fmhr/article/view/1745