Khan, Muhammad Alamgir, et al. “ASSOCIATION OF VENTRICULAR LATE POTENTIALS WITH MITRAL REGURGITATION IN PATIENTS WITH MITRAL VALVE PROLAPSE: Ventricular Late Potentials With Mitral Valve Prolapse”. Pakistan Armed Forces Medical Journal, vol. 65, no. 1, Feb. 2015, pp. 125-9, https://pafmj.org/PAFMJ/article/view/708.