Prognostic correlation between electrocardiographic QRS duration and echocardiographic left vertricular systolic function in patients with NSTEMI. J. Dhaka Natl. Med. Coll. Hosp. [Internet]. 2024 Mar. 30 [cited 2026 Jul. 5];30(1):23-8. Available from: https://www.banglajol.info/index.php/JDNMCH/article/view/81250