...Naoki Wada; Wolfgang Singer; Tonette L. Gehrking; David M. Sletten; James D. Schmelzer; Phillip A. Low The baroreflex plays a key role in human BP (blood pressure) regulation. Its efferent limb consists of a vagal and a sympathetic component. The Valsalva manoeuvre is widely used to quantify vagal...

...Jaap J. Remmen; Wim R. M. Aengevaeren; Freek W. A. Verheugt; René W. M. M. Jansen In the present study, we assessed whether elevated (≥15 mmHg) PCWP (pulmonary capillary wedge pressure) can be detected using the blood pressure response to the Valsalva manoeuvre in a group of elderly patients...

...Wolfgang SINGER; Tonette L. OPFER-GEHRKING; Benjamin R. MCPHEE; Max J. HILZ; Phillip A. LOW The objective of the present study was to evaluate the influence of posture on the responses of blood pressure (BP) and heart rate (HR) to the Valsalva manoeuvre (VM). Neurohumoral activation, as well...

...Grzegorz RACZAK; Maria Teresa LA ROVERE; Gian Domenico PINNA; Roberto MAESTRI; Grayna ŚWITECKA The purpose of the present study was to assess the agreement between measurements of baroreflex sensitivity (BRS) obtained by the Valsalva manoeuvre and by the phenylephrine test in patients with previous...

... circulation of the forearm by the application of heat or icepacks. A sphygmomanometer cuff was used to create graded occlusion of the vessel above and below the point of measurement. Recordings were also made whilst the subjects performed a standardized Valsalva manoeuvre. 3. The Doppler recordings were...

...M. A. Rahman; I. Farquhar; T. Bennett 1. Cardiovascular responses to three different interventions, namely the Valsalva manoeuvre, deep breathing and a cold stimulus on the face, were studied in two ethnic groups (European and Bangladeshi) that have been shown to differ in the prevalence...

... tests: forced breathing, standing up and the Valsalva manoeuvre. 2. We observed a concomitant intra-cough increase in supine heart rate and blood pressure and a sustained post-cough elevation of heart rate in the absence of arterial hypotension. These findings indicate that the sustained increase...

... of the total baroreflex arc by the Valsalva manoeuvre measuring only heart rate changes proved impossible, since the magnitude and time course of the heart rate response were normal notwithstanding the presence of a blood pressure response typical of sympathetic failure. 3. Sustained handgrip, cold pressor...

... pressor test on both captopril and placebo. 7. The tachycardia during the Valsalva manoeuvre was inhibited by edrophonium and to a lesser extent by captopril. The effects of captopril and edrophonium were additive. 8. Parasympathetic activity of captopril may contribute to its haemodynamic profile...

... reaching plasma concentrations up to 240 (sem 33) ng/ml had no effect on this reflex but reduced mean arterial pressure. However, the response was attenuated by clonidine in a dose-dependent manner. 2. Valsalva manoeuvres were used to elicit graded sympathetically mediated rises in TPR index in twenty-nine...