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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 (Nov. 2020). DOI:https://doi.org/10.47144/phj.v53i3.1914.