scholarly journals Heart rate–mediated blood pressure control in preterm fetal sheep under normal and hypoxic–ischemic conditions

2013 ◽  
Vol 73 (1-4) ◽  
pp. 420-426 ◽  
Author(s):  
Alex Zwanenburg ◽  
Reint K. Jellema ◽  
Ward Jennekens ◽  
Daan Ophelders ◽  
Rik Vullings ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Pressure Control ◽  
Pressure Control ◽  
Fetal Sheep

Heart rate and blood pressure control in obesity - how to detect early dysregulation?

2015 ◽  
Vol 36 (5) ◽  
pp. 337-345 ◽  
Author(s):  
Michal Javorka ◽  
Zuzana Turianikova ◽  
Ingrid Tonhajzerova ◽  
Zuzana Lazarova ◽  
Barbora Czippelova ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Pressure Control ◽  
Pressure Control

Heart rate and blood pressure control

Science ◽  
2018 ◽  
Vol 362 (6413) ◽  
pp. 415.5-416
Author(s):  
Peter Stern
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Pressure Control ◽  
Pressure Control

Endogenous Opioids Modulate Central Nervous System Blood Pressure Control in Man

1982 ◽  
Vol 63 (s8) ◽  
pp. 331s-333s ◽  
Author(s):  
P. C. Rubin ◽  
Kathleen McLean ◽  
J. L. Reid
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Pressure Control ◽  
Normal Subjects ◽  
Pressure Control ◽  
Endogenous Opioids ◽  
Plasma Noradrenaline ◽  
Head Up Tilt ◽  
Blind Manner

1. Two studies were performed to elucidate the role of opioids in blood pressure control in man. 2. Study 1: nine normal subjects, 18–32 years, received in a randomized single blind manner, volume matched infusions of a Met-enkephalin analogue (DAMME) 0.5 mg, naloxone 0.2 mg/kg or saline. Blood pressure, heart rate and plasma noradrenaline were determined supine and after a 5 min, 70° head-up tilt at 0, 3/4, 2, 3, 4, 5 and 6 h. 3. Study 2: seven subjects, after baseline recordings of blood pressure and heart rate received six incremental infusions of sodium nitroprusside, 1.5–7.5 μg min−1 kg−1. They then received DAMME or naloxone and the nitroprusside infusions were repeated between 3 and 4 h. There was a significant linear relationship between fall in mean arterial pressure and rise in heart rate in each case and the slope was used as an index of baroreflex sensitivity. 4. Neither naloxone nor DAMME influenced supine blood pressure or heart rate. Blood pressure after head-up tilt was significantly (analysis of variance) decreased by DAMME for up to 5 h but not by naloxone, the effect being most marked at 3 h: systolic (mean ± sd), placebo 110 ± 6, naloxone 106 ± 10, DAMME 96 ± 16 (P< 0.02); diastolic (mean ± sd), placebo 78 ± 7, naloxone 79 ± 5, DAMME 67 ± 8 (P < 0.01). The increases in heart rate and plasma noradrenaline on tilting after DAMME were not significantly different from values with placebo or naloxone. The 3 h values for heart rate were: placebo 87 ± 16, naloxone 88 ± 19, DAMME 89 ± 23 (P > 0.1); for plasma noradrenaline (nmol/l): placebo 6.0 ± 2.2, naloxone 5.8 ± 1.9, DAMME 6.0 ± 1.9 (P > 0.1). 5. Naloxone significantly increased the slope (beats per min/mmHg) of the regression relationship from a mean of 1.8 ± 0.07 to 3.0 ± 1.3 (P < 0.05), and DAMME reduced the slope from 2.7 ± 1.7 to 1.2 ± 0.5 (P < 0.05). 6. We conclude that endogenous opioids modulate baroreflex function in man.

scholarly journals Heart rate recovery in hypertensive patients: relationship with blood pressure control

2016 ◽  
Vol 31 (5) ◽  
pp. 354-360 ◽  
Author(s):  
Y Yu ◽  
T Liu ◽  
J Wu ◽  
P Zhu ◽  
M Zhang ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Pressure Control ◽  
Heart Rate Recovery ◽  
Pressure Control ◽  
Hypertensive Patients

BLOOD PRESSURE CONTROL OF HYPERTENSIVE PATIENTS WITH HIGH HEART RATE (RESULTS FROM NATURE HTN)

2021 ◽  
Vol 39 (Supplement 1) ◽  
pp. e281
Author(s):  
Rania Hammami ◽  
Amine Bahloul ◽  
Salma Charfeddine ◽  
Faten Triki ◽  
Tarek Ellouze ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Pressure Control ◽  
Pressure Control ◽  
High Heart Rate ◽  
Hypertensive Patients

Is baroreflex control of sympathetic activity and heart rate active in the preterm fetal sheep?

2009 ◽  
Vol 296 (3) ◽  
pp. R603-R609 ◽  
Author(s):  
Lindsea C. Booth ◽  
Simon C. Malpas ◽  
Carolyn J. Barrett ◽  
Sarah-Jane Guild ◽  
Alistair J. Gunn ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Sympathetic Nerve ◽  
Sympathetic Nerve Activity ◽  
Pressure Control ◽  
Autonomic Response ◽  
Nerve Activity ◽  
Baroreflex Control ◽  
Fetal Sheep ◽  
Arterial Blood

The arterial baroreflex is a fundamental reflex that buffers rapid changes in arterial blood pressure (BP) via regulation of the heart rate and sympathetic nerve activity to the vasculature. In adults a sigmoidal relationship between BP and both heart rate and sympathetic nerve activity is well documented. Its role in blood pressure control before birth is unclear. Preterm babies have a high incidence of low BP, especially in the first few days of life, which could be related, in part, to immaturity of the baroreflex. In the present study, we investigated the baroreflex control of fetal heart rate and renal sympathetic nerve activity (RSNA) in preterm fetal sheep in utero (102 ± 1 days of gestation; term 140 days). Phenylephrine was associated with a significant increase in BP from 38 ± 2 to 58 ± 3 mmHg and a decrease in heart rate (HR) from 177 ± 4 to 116 ± 8 beats per minute (bpm). Sodium nitroprusside was associated with a significant fall in BP from 38 ± 2 to 26 ± 1 mmHg and an increase in HR from 182 ± 4 to 274 ± 8 bpm. However, the time between the 50% changes in BP and HR was significantly greater after hypotension than hypertension (31 ± 8 s vs. 14 ± 5 s, P < 0.05). No significant changes in RSNA occurred with either stimulus. This suggests that there are different maturational tempos for the components of the central autonomic response to altered blood pressure.

Modulation of Heart Rate by Acute or Chronic Aerobic Exercise. Potential Effects on Blood Pressure Control

2017 ◽  
Vol 23 (31) ◽  
Author(s):  
Carme Perez-Quilis ◽  
J. Derek Kingsley ◽  
Kabir Malkani ◽  
Gianfranco Cervellin ◽  
Giuseppe Lippi ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Aerobic Exercise ◽  
Blood Pressure Control ◽  
Pressure Control
Sign in / Sign up

Export Citation Format

Share Document