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Ahmed N, Niazi GZK, Tariq H, Akhtar A, Saleemi MS, Zaffar MZ, Ahmad I. PROLONGED QRS DURATION>140 MILLISECONDS AS A PREDICTOR OF LEFT VENTRICULAR SYSTOLIC DYSFUNCTION IN PATIENTS WITH LEFT BUNDLE BRANCH BLOCK. Pak Heart J [Internet]. 2020Nov.7 [cited 2024Nov.27];53(3). Available from: https://pakheartjournal.com/index.php/pk/article/view/1914