The epidemic of orthostatic tachycardia and orthostatic intolerance.
1999
D Robertson
Clinical Research Center, Vanderbilt University, Nashville, Tennessee 37232-2195, USA. david.robertson@mcmail.vanderbilt.edu
UI
MeSH Term
Description
Entries
D011187
Posture
The position or physical attitude of the body.
Postures
D003937
Diagnosis, Differential
Determination of which one of two or more diseases or conditions a patient is suffering from by systematically comparing and contrasting results of diagnostic measures.
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013610
Tachycardia
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.
Tachyarrhythmia,Tachyarrhythmias,Tachycardias
D017704
Baroreflex
A response by the BARORECEPTORS to increased BLOOD PRESSURE. Increased pressure stretches BLOOD VESSELS which activates the baroreceptors in the vessel walls. The net response of the CENTRAL NERVOUS SYSTEM is a reduction of central sympathetic outflow. This reduces blood pressure both by decreasing peripheral VASCULAR RESISTANCE and by lowering CARDIAC OUTPUT. Because the baroreceptors are tonically active, the baroreflex can compensate rapidly for both increases and decreases in blood pressure.