Carotid Ultrasound Study

Carotid Ultrasound Study

To use carotid ultrasound to screen 20-30 patients with longstanding or resistant hypertension for carotid atherosclerotic disease and bifurcation anatomy. This will establish a screening protocol for Cibiem's eventual endovascular carotid body modulation trial and will give insight into the prevalence and specific location of carotid plaque at the bifurcation in this patient population.

Inclusion Criteria:

• 18-75 years old
• Uncontrolled hypertension on 3 or more medications or longstanding controlled hypertension on 4 or more medications.

Exclusion Criteria:

• Previous stroke
• Carotid endarterectomy or carotid stent procedure
• >50% stenosis anywhere in carotid arteries