Concealed ventricular parasystole exposed by abrupt cessation of pacing.
D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000503:physiopathology; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged