1. Retrograde atrial conduction with complete heart block following implantation of an internal ventricular pacemaker;Adams, C.W.;Diseases of the Chest,1963
2. Unidirectional block in heart muscle;Ashman, R.; Hafkesbring, R.;American Journal of Physiology,1929
3. Retrograde conduction in complete heart block;Castillo, C.; Samet, P.;British Heart J7ournal,1967
4. Concealed retrograde conduction in complete atrioventricular block;Cohen, S.I.; Smith, L.K.; Aroesty, J.M.; Voukydis, P.; Morkin, E.;Circulation,1974
5. The occurrence of auricular contractions in a case of incomplete and complete heart-block due to stimuli received from the contracting ventricles;Cohn, A.E.; Fraser, F.R.;Heart,1913