title: Electrocardiogram of the month. Electrical pacing of the ventricle and retrograde VA conduction.
mesh_terms: D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000175:diagnosis* / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged