Dysfunction of the peripheral and central autonomic nervous system is common in many
neurological and general medical diseases. The quantitative assessment of sympathetic …

This concept-based review provides historical perspectives and updates about sympathetic
noradrenergic and sympathetic adrenergic responses to mental stress. The topic of this …

To characterize the idiopathic postural orthostatic tachycardia syndrome (POTS), we
reviewed the records of all patients aged 20 to 51 who presented to the Mayo Autonomic …

Background The postural tachycardia syndrome is a common disorder that is characterized
by chronic orthostatic symptoms and a dramatic increase in heart rate on standing, but that …

Background The classification of dysautonomias has been confusing, and the
pathophysiology obscure. We examined sympathetic innervation of the heart in patients with …

BACKGROUND: In chronic heart failure (CHF), persistent autonomic derangement and
neurohumoral activation cause structural end-organ damage, decrease exercise capacity …

Abstract Changes in heart rate, arterial pressure, norepinephrine and epinephrine levels
were compared in 19 consecutive patients (10 men and 9 women, mean age 46±16 years) …

Dopamine in the circulation occurs mainly as dopamine sulfate, the sources and
physiological significance of which have been obscure. In this study, plasma concentrations …

To evaluate the effects of calcium antagonists on sympathetic activity in hypertensive
patients, a MEDLINE search for English language articles published between 1975 and May …

Twenty-five patients (aged 62±2 years) with stable, moderate to severe ischemic congestive
heart failure (CHF)(New York Heart Association class II/III: 15/10; ejection fraction 21.6±2%; …