There is a part of you brain called the PMRF. One of its jobs is to keep your heart rate/blood pressure normal. If the PMRF is not working correctly, you can have high blood pressure and a high heart rate. Medications for high blood pressure work very well. But there are individuals with high blood pressure that can not be controlled by medications or medications help some but still the person has high blood pressure.
Finding out if this PMRF is a problem is possible and the treatment for it if it is a problem does not involved surgery or medication. Treatment can be as easy as doing a simple eye exercise for 2 minutes several times a day.
A functional neurologist just has to know what to look for and how you can fix what you find.