Harky, A., M. Bashir, C. Grafton-Clarke, M. Lees, S. Fendius, and N. Roberts. “Severe Bradycardia Prior to Coronary Artery Bypass Graft Surgery: A Case Report”. The Journal of Tehran University Heart Center, Vol. 13, no. 3, July 2018, pp. 136-9, doi:10.18502/jthc.v13i3.134.