Ahmed, N., Niazi, G. Z. K., Tariq, H., Akhtar, A., Saleemi, M. S., Zaffar, M. Z. and Ahmad, I. (2020) “PROLONGED QRS DURATION>140 MILLISECONDS AS A PREDICTOR OF LEFT VENTRICULAR SYSTOLIC DYSFUNCTION IN PATIENTS WITH LEFT BUNDLE BRANCH BLOCK”, Pakistan Heart Journal, 53(3). doi: 10.47144/phj.v53i3.1914.