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?”, JFacMedBagdad, vol. 63, no. 1, pp. 1–7, May 2021, doi: 10.32007/jfacmedbagdad.6311820.