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The North American vasovagal pacemaker study (VPS) ^,2

A randomized trial of permanent cardiac pacing for the prevention of vasovagal syncope

Stuart J. Connolly, MD, FRCPC, FACC^a, Robert Sheldon, MD, PhD, FRCPC, FACC, Robin S. Roberts, MTech^b, Michael Gent, Dsc^b on Behalf of the Vasovagal Pacemaker Study Investigators

^a Department of Medicine, McMaster University, Hamilton, Ontario, Canada
^b Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada
Cardiovascular Research Group, University of Calgary, Alberta, Calgary, Canada

View larger version (15K): [in a new window]   Figure 1 Kaplan-Meier plots of the time to the first recurrence of syncope among 27 patients randomized to receive a pacemaker and 27 patients randomized to not receive a pacemaker by intention-to-treat analysis.