-- Objective evidence of disease perceptible to the examining physician.
-- An indication that a person has a condition or disease. Some examples of symptoms are headache, fever, fatigue, nausea, vomiting, and pain.
-- A general term for diseases produced by viruses.
-- Malformations of organs or body parts during development in utero.
-- A definite pathologic process with a characteristic set of signs and symptoms. It may affect the whole body or any of its parts, and its etiology, pathology, and prognosis may be known or unknown.
-- Disturbance, impairment or abnormality of function.
-- A usually benign, well-encapsulated, lobular, vascular tumor of chromaffin tissue of the ADRENAL MEDULLA or sympathetic paraganglia. The cardinal symptom, reflecting the increased secretion of EPINEPHRINE and NOREPINEPHRINE, is HYPERTENSION, which may be persistent or intermittent. During severe attacks, there may be HEADACHE; SWEATING, palpitation, apprehension, TREMOR; PALLOR or FLUSHING of the face, NAUSEA and VOMITING, pain in the CHEST and ABDOMEN, and paresthesias of the extremities. The incidence of malignancy is as low as 5% but the pathologic distinction between benign and malignant pheochromocytomas is not clear. (Dorland, 27th ed; DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p1298)
Plasma volume measurement
Red cell mass procedure
Signs and Symptoms
-- Clinical manifestations that can be either objective when observed by a physician, or subjective when perceived by the patient.
-- An acute or chronic disorder, affecting the sympathetic or parasympathetic nervous system. It can be primary, the result of central nervous system degeneration, or secondary due to diabetes or alcoholism. Patients with the chronic form of this disorder usually have a progressive clinical course and a poor prognosis.
-- Abnormally rapid heartbeat, usually with a HEART RATE above 100 beats per minute for adults. Tachycardia accompanied by disturbance in the cardiac depolarization (cardiac arrhythmia) is called tachyarrhythmia.
Mitral Valve Prolapse
-- Abnormal protrusion or billowing of one or both of the leaflets of MITRAL VALVE into the LEFT ATRIUM during SYSTOLE. This allows the backflow of blood into left atrium leading to MITRAL VALVE INSUFFICIENCY; SYSTOLIC MURMURS; or CARDIAC ARRHYTHMIA.
-- disorder of nutrition due to unbalanced or insufficient diet or to defective assimilation or utilization of nutrients.
DOPAMINE BETA-HYDROXYLASE DEFICIENCY, CONGENITAL
-- A disorder affecting the cranial nerves or the peripheral nervous system. It is manifested with pain, tingling, numbness, and muscle weakness. It may be the result of physical injury, toxic substances, viral diseases, diabetes, renal failure, cancer, and drugs. -- 2004
-- Pertaining to autoimmunity.
-- Pathological conditions involving the CARDIOVASCULAR SYSTEM including the HEART; the BLOOD VESSELS; or the PERICARDIUM.