An APBD patient reports having significant issues with blood pressure. It goes from being very high (in excess of 220 systolic) to very low (60 systolic). Fainting occurred when it dropped as well as when it soared.
Some patients with APBD manifest significant postural hypotension, sometimes leading to syncope episodes because of inappropriate cardiac response. These are related to autonomic nervous system involvement by the disease.
Occasionally, patients also have hypothermia (low body temperature) and hyponatremia (low sodium).
Treatment includes several modalities and is difficult and must be conducted by a specialist in autonomic nervous system disorders.