title: The use of multiple extrastimuli during programmed ventricular stimulation: how many should be used?
mesh_terms: D002304:Cardiac Pacing, Artificial / Q000379:methods*; D004562:Electrocardiography; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D012008:Recurrence; D012306:Risk; D013610:Tachycardia / Q000175:diagnosis* / Q000503:physiopathology