1. Pacing alternans: an unusual pattern of pacemaker behavior;Pavri;Pacing Clin Electrophysiol,2000
2. Loss of capture recovery and fusion avoidance algorithms;St. Jude Medical,1998
3. Adapta/Versa/Sensia pacemaker reference guide;Medtronic Inc.,2006
4. System guide Insignia I Ultra Models 1190, 1290, 1291;Boston Scientific,2006