title: I've had a pacemaker for many years and have developed persistent atrial fibrillation (AF). In the past three years, I've also had episodes of ventricular tachycardia (VT). I had valve surgery six years ago and am concerned that the pacemaker lead may have been damaged during surgery. What should I know about a replacement pacemaker?
mesh_terms: D058671:Adrenergic beta-1 Receptor Antagonists / Q000627:therapeutic use; D000368:Aged; D001281:Atrial Fibrillation / Q000209:etiology*; D006348:Cardiac Surgical Procedures / Q000009:adverse effects*; D019544:Equipment Failure Analysis; D006349:Heart Valve Diseases / Q000150:complications / Q000628:therapy; D006801:Humans; D008790:Metoprolol / Q000627:therapeutic use; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D017180:Tachycardia, Ventricular / Q000209:etiology* / Q000517:prevention & control*
chemical_list: D058671:Adrenergic beta-1 Receptor Antagonists; D008790:Metoprolol