Dr Sulaiman khan, Dr Latif Ullah, Dr Muhammad Waseem Hussain. DIAGNOSTIC ACCURACY OF PROLONGED QRS COMPLEXES > 140MS ON ECG AS A PREDICTOR OF LEFT VENTRICULAR SYSTOLIC DYSFUNCTION KEEP ECHOCARDIOGRAPHY AS A GOLD STANDARD. J Popl Ther Clin Pharmacol [Internet]. 2025 Feb. 21 [cited 2025 Sep. 17];32(1):1217-22. Available from: https://jptcp.com/index.php/jptcp/article/view/9362