"Carotid pacemakers, also known as implantable carotid sinus stimulators, are devices that deliver activation energy, via carotid leads, to the carotid baroreceptors. This is sometimes offered for drug-resistant hypertension. The baroreceptors send signals to the brain and the signals are interpreted as a rise in blood pressure. The brain sends signals to other parts of the body to reduce blood pressure such as the blood vessels, heart and kidneys."