This study involves sampling blood from both normal volunteers and patients with diseases
known or suspected to involve body chemicals called catecholamines. The blood will be used
to establish normal values for plasma levels of catecholamines and related neurochemicals;
to test for abnormal neurochemical patterns in patients; and to establish a "bank" of DNA
from normal volunteers and from patients to be used in future studies about possible
alterations of catecholamine-related genes.
Study participants will report to NIH after fasting overnight except for water or
noncaloric, noncaffeinated beverages. They must not have taken Tylenol for at least 5 days.
Blood will then be drawn. DNA will be extracted and stored in the freezer for future
This project is to allow blood sampling from normal volunteers and patients with
dysautonomia, pheochromocytoma, hypertension, or neurogenetic diseases involving
catecholaminergic systems. The blood is used to establish normal values for plasma levels
of catechols and related neurochemicals; test for abnormal neurochemical patterns in
patients; and establish a "bank" of DNA samples from normal volunteers and from patients, to
be used in future studies about mutations or polymorphisms of catecholamine-related genes.
The subjects are healthy normal volunteers or patients with dysautonomia,
pheochromocytoma, hypertension, or neurogenetic diseases involving catecholaminergic
systems. Children of any age above 4 years may participate. In the case of minors,
consent is obtained from an adult who is legally responsible for the subject.
Subjects in whom anatomic or technical factors preclude insertion of an arm intravenous
(i.v.) catheter are excluded. Normal volunteers taking any prescribed medication are
excluded. Normal volunteers who smoke cigarettes or consume alcohol daily are excluded.