title: Detection and characteristics of retrograde P waves.
abstract: Clinical evaluation performed on an external prototype of a programmable VDD pacemaker showed a high risk of induction of pacemaker-mediated tachycardia. In these tests tachycardia was observed following magnet removal, premature atrial and ventricular complexes, myopotential oversensing, detection of electrical interference and other events. The high risk and poor predictability of pacemaker-mediated tachycardia suggest that VDD (or DDD) pacemakers should provide automatic means to control this kind of tachycardia without undue loss of the hemodynamic benefits which can be provided by these units.
mesh_terms: D002304:Cardiac Pacing, Artificial / Q000379:methods*; D004562:Electrocardiography; D004594:Electrophysiology; D006325:Heart Atria / Q000503:physiopathology; D006801:Humans; D008280:Magnetics; D009132:Muscles / Q000503:physiopathology; D013610:Tachycardia / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology