title: Intracardiac extrastimulation studies: How to? Where? By whom?
mesh_terms: D006328:Cardiac Catheterization; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006801:Humans; D013610:Tachycardia / Q000175:diagnosis*; D014693:Ventricular Fibrillation / Q000175:diagnosis*