Components of heart rate variability have attracted considerable attention in psychology and
medicine and have become important dependent measures in psychophysiology and …

Disturbances in cardiovascular neural regulation, influencing both disease course and
survival, progress as heart failure worsens. Heart failure due to left ventricular systolic …

Power spectrum analysis of heart rate fluctuations provides a quantitative noninvasive
means of assessing the functioning of the short-term cardiovascular control systems. We …

This review describes the changes that occur in circulating renin-angiotensin-aldosterone
system (RAAS) components in human pregnancy. These changes depend on endocrine …

The renin-angiotensin system has a varied role in the regulation of cardiac function, ranging
from early receptor-mediated effects such as second messenger generation, to more …

BACKGROUND--Activation of the sympathetic nervous system has been extensively studied
in patients with chronic heart failure, but the parasympathetic nervous system has received …

In addition to its traditional role as a circulating hormone, angiotensin is also involved in
local functions through the activity of tissue renin-angiotensin systems that occur in many …

Objectives. The objective of this investigation was to evaluate the changes in
parasympathetic tone associated with long-term angiotensin-converting enzyme inhibitor …

The renin–angiotensin–aldosterone system (RAAS) impacts cardiovascular homeostasis via
direct actions on peripheral blood vessels and via modulation of the autonomic nervous …

A range of techniques for the assessment of autonomic tone are described. Impaired
baroreflex control of heart period, measured in terms of heart rate variability or baroreflex …