A. T. AL-HAMDI and A. J. Ali, “The efficacy of synchronized direct current shock in reverting long standing persistent atrial fibrillation in to sinus rhythm. What help to achieve high success rate?”, J Fac Med Baghdad, vol. 63, no. 1, pp. 1–7, May 2021, doi: 10.32007/jfacmedbagdad.6311820.