title: Therapeutic predicament--the unresponsive PVC.
mesh_terms: D000368:Aged; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use*; D005117:Cardiac Complexes, Premature / Q000188:drug therapy / Q000601:surgery / Q000628:therapy*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008012:Lidocaine / Q000627:therapeutic use; D008991:Monitoring, Physiologic; D009204:Myocardial Revascularization; D010138:Pacemaker, Artificial; D010672:Phenytoin / Q000627:therapeutic use; D011342:Procainamide / Q000627:therapeutic use; D011433:Propranolol / Q000627:therapeutic use; D011802:Quinidine / Q000627:therapeutic use
chemical_list: D000889:Anti-Arrhythmia Agents; D010672:Phenytoin; D008012:Lidocaine; D011433:Propranolol; D011802:Quinidine; D011342:Procainamide