Our aim was to develop a signal analysis method for revealing interrelationships between
heart rate and blood pressure and for displaying the influence of autonomic nervous control …

Cardiovascular parameters exhibit spontaneous oscillations at the respiratory frequency,
and in the low frequency range (LF< 0.20 Hz). Although LF is attributed to the sympathetic …

This study evaluated the role of arterial baroreceptors in arterial pressure (AP) and pulse
interval (PI) regulation in conscious C57BL mice. Male animals, implanted with catheters in …

Angiotensin II, methoxamine and phenylephrine were evaluated in two tests of reflex
responsiveness that involve arterial pressure increases (delta BP) and reflex bradycardia …

The function of the arterial baroreflex has traditionally been assessed by measurement of
reflex changes in heart rate (HR) or sympathetic nerve activity resulting from experimenter …

We have recently shown that an angiotensin-(1-7)[Ang-(1-7)] analogue, d-Ala7-Ang-(1-7)(A-
779), is a selective Ang-(1-7) antagonist with no significant action on angiotensin type 1 or …

The purpose of this study is to describe the developmental course of arterial baroreflex
control of heart rate in swine. Tests of baroreflex function were performed with eight …

ACTH administration in sheep produces an adrenally dependent rise in blood pressure.
Cardiac output and heart rate are usually increased. The precise mechanisms involved in …

Autonomic receptor modulation of ultradian oscillations of blood pressure and heart rate was
studied in telemetered free-running dogs. Data, analyzed for their harmonic content by fast …

Significant fluctuations in heart rate (HR) and arterial pressure occur during fetal life.
However, the mechanisms regulating this normal variability are not completely understood …