1. Observations on sudden death during pacemaker stimulation in comcan be used in ambulatory patients as well as in plete atrioventricular block, leading to the development those in hospital. By observing both the morphology of the QRS complexes, as well as rate changes, an estimate of the periods of transient pacemaker activity could be made. Permanent recording could be obtained at any time. In the majority of of a 'P-wave' pacemaker without atrial leads;Bonnabeau, Jr., R.C.; Bilgutay, A.M.; Stems, L.P.; Wingrove, R.; Lillehei, C.W.;Trans. Amer. Soc. Artif. intern. Organs,1963
2. The use of the demand pacemaker in auriculo-ventricular conduction disturbances;Castellanos, Jr., A.; Lemberg, L.; Berkovits, B.V.;J. cardiovasc. Surg,1966
3. cases visual observations were sufficient;This; Gosselin, A.,1964
4. Beat-to-beat variation between natural;rhythm;Cardiologia (Basel); Double artificial ventriand ectopic pacemaker was more difficult to analyse from the screen displaying only QRS morphology, but could be assessed with certainty by observing the occurrence of rate changes in the corresponding cular parasystole. Iatrogenic arrhythmia for the study of excitability and conductivity in the human heart,1965
5. Repetitive firing occurring during synchronized electrical stimulation of the heart;Jude, J.R.; Berkovits, B.V.;J. thorac. cardiovasc. Surg,1966