Clinical Research Directory

Inclusion Criteria: 1. Subject is ≥ 18 years of age 2. Subject requires implantation or replacement of a dual chamber pacemaker or requires an upgrade from a single chamber to a dual chamber pacemaker 3. Subject has known Hypertension 4. Subject is willing and able to comply with the study and procedures. Exclusion Criteria: 1. Subject has symptoms of heart failure, NYHA Class II or greater 2. Subject has significant (\>2+) mitral regurgitation, aortic regurgitation or aortic stenosis. 3. Subject has permanent atrial fibrillation 4. Subject has atrial fibrillation on the day of the study. 5. Subject has hypertrophic cardiomyopathy, restrictive cardiomyopathy or interventricular septal thickness ≥15 mm 6. Subject is on dialysis 7. Subject has a history of prior neurological events (stroke or TIA) within the past year or a neurological event (stroke or TIA) at any prior time that has resulted in residual neurologic deficit. 8. Subject has a history of autonomic dysfunction 9. Women who are pregnant or breast-feeding 10. Subject cannot or is unwilling to provide informed consent.