The Atrial High Rate Episodes in Pacemaker Patients

Inclusion Criteria: * Patients undergoing a Medtronic Kappa DR 700 or Medtronic Kappa 900 DR implant, for approved indications * No previous history of pacemaker implantation * Patients 50 years of age or older Exclusion Criteria: * Patients with a history of atrial tachyarrhythmias (primary arm of study) * Patients with medical conditions that would limit study participation * Patients inaccessible for follow-up at the study center * Patients incapable of providing Informed Consent * Patients with NYHA classification of IV * Patients with a history of neurocardiogenic syncope, long QT syndrome, or Hypertrophic Obstructive Cardiomyopathy (HOCM) * Patients taking Sotalol or Amiodorone * Patients with a history of a prior ICD or pacemaker implantation.