POSTURAL CHANGES IN HEART RATE AND BLOOD PRESSURE WITH AGEING

2014 ◽  
Vol 2 (6) ◽  
pp. 751-756 ◽  
Author(s):  
K. Pujitha ◽  
◽  
G. Parvathi ◽  
K. Muni Sekhar ◽  
◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Postural Changes

Baroreceptor influence on postural changes in blood pressure and carotid blood flow

1963 ◽  
Vol 205 (2) ◽  
pp. 360-364 ◽  
Author(s):  
Francis L. Abel ◽  
John H. Pierce ◽  
Warren G. Guntheroth
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Sinus ◽  
Systemic Blood Pressure ◽  
Systemic Blood ◽  
Carotid Blood Flow ◽  
Postural Changes ◽  
Nembutal Anesthesia

The effects of 30° head-down and head-up tilting on mean systemic blood pressure, carotid blood flow, and heart rate were studied in 16 dogs under morphine and Nembutal anesthesia. The tilting procedure was further repeated after denervation of the carotid sinus and aortic arch baroreceptors and after administration of a dihydrogenated ergot alkaloid mixture (Hydergine). The results indicate that the drop in pressure in the head-down position is primarily due to baroreceptor activity and that the baroreceptors are necessary for compensatory vasoconstriction on head-up tilting. Carotid blood flow decreased in both tilted positions in the control animals; the possible relationship to cerebral blood flow is discussed.

scholarly journals Pregnant Supports on Hemodynamics Responses during Postural Changes and Daily Physical Activities: a randomized control trial

2021 ◽  
Author(s):  
Kunanya Masodsai ◽  
Sasipa Buranapuntulug ◽  
Parunchaya Jamkrajang ◽  
Pei-Ni Chen ◽  
Rungchai Chaunchaiyakul
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Pregnant Women ◽  
Blood Perfusion ◽  
Physical Activities ◽  
Lower Limbs ◽  
Blood Flows ◽  
Postural Changes ◽  
Significant Difference ◽  
Daily Physical Activities

Abstract BackgroundPregnant supports have been designed to prevent structural deviations but may impair blood circulation of the lower limbs, in particular during the last trimester. In this study, we evaluate the effect of different pregnant supports on hemodynamics responses during postural changes and daily physical activities.MethodsTwelve last-trimester healthy pregnant women participated in this study. With randomized supports of casual wear (CW), pelvic band (PB), and pregnant pants (PP), subjects performed postural changes (standing and side lying using sitting as control), daily physical activities (climbing up and down stairs, lifting, sit-to-stand, and 10 min walking), and routine pregnant exercises. Hemodynamic responses including heart rate, blood pressure, stroke volume, cardiac output, local blood flow, and perfusion around the ankle were measured at the end of the 1st and 3rd minute after wearing pregnant supports.ResultsStanding position in CW group showed hemodynamic compensations via increasing diastolic blood pressure (DBP, 1st minute) and heart rate (HR, 3rd minute), whereas there were no significant changes in the PB and PP groups. Side lying position lowered cardiac responses in all groups, with higher blood perfusion in CW and PB, but not in PP. Cardiac variables, blood flows, and perfusions showed no significant difference among pregnant supports during daily physical activities, and routine pregnant exercises. The satisfaction evaluation on daily activities and routine exercises showed no difference among pregnant supports but the preferential pregnant support is PB.ConclusionIt can be concluded that PB offers similar hemodynamic adjustments during postural changes as casual wear. PB support is recommended for pregnant women for daily physical activities, as well as routine exercises. Trial registration: The trial is retrospectively registered in http://www.clinicaltrials.in.th (01/02/2021) with trial no: TCTR20210201003.

Orthostatic Circulatory Control in the Elderly Evaluated by Non-Invasive Continuous Blood Pressure Measurement

1990 ◽  
Vol 79 (1) ◽  
pp. 73-79 ◽  
Author(s):  
B. P. M. Imholz ◽  
J. H. A. Dambrink ◽  
J. M. Karemaker ◽  
W. Wieling
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Systolic Blood Pressure ◽  
Time Course ◽  
Blood Pressure Measurement ◽  
Elderly Subjects ◽  
Postural Changes ◽  
Significant Difference ◽  
Head Up Tilt ◽  
Blood Pressures

1. Continuous orthostatic responses of blood pressure and heart rate were measured in 40 healthy and active elderly subjects over 70 years of age in order to assess the time course and rapidity of orthostatic cardiovascular adaptation in old age. 2. During the first 30 s (initial phase) the effects of active standing and passive head-up tilt closely resembled those observed earlier in younger age groups. Standing up was accompanied by a drop (mean ± SD) in systolic and diastolic blood pressures of 26 ± 13 mmHg and 12 ± 18 mmHg, respectively, at around 10 s, and a subsequent rise up to 11 ± 17 mmHg and 8 ± 6 mmHg above supine values at around 20 s. The drop in blood pressure upon standing was accompanied by a transient increase in heart rate with a maximum of 13 beats/min, followed by a gradual decrease to 7 beats/min above supine levels. These characteristic transient changes were absent upon a passive head-up tilt. 3. After 1–2 min of standing (early steady-state phase) diastolic blood pressure and heart rate increased significantly after active and passive postural changes. On average, for all subjects systolic blood pressure tended to increase from control during 5–10 min standing, reaching a significant difference at 10 min. During standing, the largest increases in systolic blood pressure were found in subjects with the lowest supine blood pressures. 4. In conclusion, for the investigation of orthostatic circulatory responses in elderly subjects the following factors have to be taken into account: active versus passive changes in posture, the timing of the blood pressure reading, and the level of supine blood pressure.

Effects of bilateral vestibular nucleus lesions on cardiovascular regulation in conscious cats

2005 ◽  
Vol 98 (2) ◽  
pp. 526-533 ◽  
Author(s):  
R. L. Mori ◽  
L. A. Cotter ◽  
H. E. Arendt ◽  
C. J. Olsheski ◽  
B. J. Yates
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Visual Information ◽  
Vestibular Nucleus ◽  
Body Position ◽  
Cardiovascular Responses ◽  
Vestibular Nuclei ◽  
Cardiovascular Regulation ◽  
Postural Changes ◽  
Body Location

The vestibular system participates in cardiovascular regulation during postural changes. In prior studies (Holmes MJ, Cotter LA, Arendt HE, Cas SP, and Yates BJ. Brain Res 938: 62–72, 2002, and Jian BJ, Cotter LA, Emanuel BA, Cass SP, and Yates BJ. J Appl Physiol 86: 1552–1560, 1999), transection of the vestibular nerves resulted in instability in blood pressure during nose-up body tilts, particularly when no visual information reflecting body position in space was available. However, recovery of orthostatic tolerance occurred within 1 wk, presumably because the vestibular nuclei integrate a variety of sensory inputs reflecting body location. The present study tested the hypothesis that lesions of the vestibular nuclei result in persistent cardiovascular deficits during orthostatic challenges. Blood pressure and heart rate were monitored in five conscious cats during nose-up tilts of varying amplitude, both before and after chemical lesions of the vestibular nuclei. Before lesions, blood pressure remained relatively stable during tilts. In all animals, the blood pressure responses to nose-up tilts were altered by damage to the medial and inferior vestibular nuclei; these effects were noted both when animals were tested in the presence and absence of visual feedback. In four of the five animals, the lesions also resulted in augmented heart rate increases from baseline values during 60° nose-up tilts. These effects persisted for longer than 1 wk, but they gradually resolved over time, except in the animal with the worst deficits. These observations suggest that recovery of compensatory cardiovascular responses after loss of vestibular inputs is accomplished at least in part through plastic changes in the vestibular nuclei and the enhancement of the ability of vestibular nucleus neurons to discriminate body position in space by employing nonlabyrinthine signals.

EEG Activity, Heart Rate, and Blood Pressure during Postural Changes

2006 ◽  
Author(s):  
Amy Vaughan Van Hecke ◽  
Stephen W. Porges ◽  
Damon Lamb ◽  
Elgiz Bal ◽  
Keri Heilman
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Eeg Activity ◽  
Postural Changes

Postural cardiovascular reflexes: comparison of responses of forearm and calf resistance vessels

1987 ◽  
Vol 63 (5) ◽  
pp. 1801-1805 ◽  
Author(s):  
L. K. Essandoh ◽  
D. A. Duprez ◽  
J. T. Shepherd
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Arterial Blood Pressure ◽  
Vascular Resistance ◽  
Valsalva Maneuver ◽  
Cardiovascular Reflexes ◽  
Arterial Blood ◽  
Resistance Vessels ◽  
Postural Changes ◽  
Change In Mean

Simultaneous measurements were made of changes in vascular resistance in the forearm and calf in response to moving from supine to sitting or to head-down tilt. The subjects were healthy male volunteers, 21–63 yr. Blood flows were measured by venous occlusion plethysmography using mercury-in-Silastic strain-gauges. The gauges were maintained at the same level relative to the heart during the postural changes. Arterial blood pressure was measured by auscultation; heart rate was counted from the plethysmograms. Changing from supine to sitting caused a decrease in forearm blood flow from 4.13 +/- 0.14 to 2.16 +/- 0.19 ml.100 ml-1.min-1. Corresponding calf flows were 4.21 +/- 0.32 and 4.40 +/- 0.59 ml.100 ml-1.min-1. There was no change in mean arterial blood pressure, and heart rate increased by 8.0 +/- 1.5 beats/min. Arrest of the circulation of both legs with occlusion cuffs on the thighs before sitting, to prevent pooling of blood in them, reduced the degree of forearm vasoconstriction. Neck suction (40 Torr) during sitting, to oppose the decrease in transmural pressure at the carotid sinuses, inhibited the vasoconstriction. During a 30 degrees head-down tilt, there was a dilatation of forearm but not of calf resistance vessels. A Valsalva maneuver caused a similar constriction of both vascular beds. Thus, when changes in vascular resistance in forearm and calf are compared, the major reflex adjustments to changes in posture take place in the forearm.

The Postural Autonomic Regulation of Pulpal Blood Flow

2012 ◽  
Vol 92 (2) ◽  
pp. 156-160 ◽  
Author(s):  
O. Ajcharanukul ◽  
E. Chunhacheevachaloke ◽  
P. Vorachart ◽  
W. Chidchuangchai
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Flow ◽  
Venous Blood ◽  
Systemic Blood Pressure ◽  
Blood Pressure Monitor ◽  
Pressure Monitor ◽  
Systemic Blood ◽  
Pulpal Blood Flow ◽  
Postural Changes

Evidence suggests that postural changes in systemic blood pressure may significantly affect blood flow in the dental pulp. This in vivo study examined the responses of pulpal perfusion, systemic blood pressure, and heart rate to postural changes in humans. The experiments were done on 21 premolars in 16 participants aged 20-31 yrs. Pulpal blood flow recordings were measured by means of a laser Doppler Flowmeter. A blood pressure monitor was used to record blood pressure and heart rate. All measurements were simultaneously recorded for 1 min, 5 min after participants made postural changes. Changing from supine to standing caused a significant reduction in pulpal perfusion, while heart rate and diastolic blood pressure increased significantly. A significant non-linear relationship was found between percentage changes in pulpal perfusion and heart rate resulting from standing up. We speculate that when patients arise from the supine position, the shift in venous blood to the legs transiently (2-10 sec) lowers venous return and cardiac output, causing less inhibition of the vasomotor center, which, in turn, results in increased heart rate and blood pressure, but a decrease in pulpal blood flow. These results suggest that pulpal blood flow is affected by postural change, presumably via the autonomic nervous system.

Twenty-four-hour rhythms of plasma catecholamines and their relation to cardiovascular parameters in healthy young men

1997 ◽  
pp. 675-683 ◽  
Author(s):  
C Schofl ◽  
C Becker ◽  
K Prank ◽  
A von zur Muhlen ◽  
G Brabant
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Diurnal Rhythm ◽  
Plasma Catecholamines ◽  
Plasma Norepinephrine ◽  
Ultradian Rhythms ◽  
Cardiovascular Parameters ◽  
Pulse Detection ◽  
Neural Input ◽  
Postural Changes

Diurnal and ultradian rhythms of plasma norepinephrine and epinephrine and their role in the regulation of cardiovascular parameters were investigated over 24 h of recumbency in a group of five men. Catecholamines were measured at 10 min intervals, and blood pressure and heart rate were recorded continuously. Norepinephrine and epinephrine rapidly fluctuated in each subject, with no obvious diurnal rhythm. Spectral analysis suggested two ultradian rhythms with periods of around 12 h and 50-100 min for both catecholamines. The pulse detection programs PULSAR and CLUSTER revealed 20-30 pulses/24 h for norepinephrine and epinephrine, with a significant correlation between the two rhythms (r = 0.63-0.80, P < 0.001). Neither the frequency nor the amplitude of these rapid fluctuations differed between day and night. Arousal in the morning caused a small increase in plasma catecholamines and getting out of bed a large increase. Thus changes in posture and activity are the main influences on the diurnal variations of plasma catecholamines reported previously, while the ultradian rhythms of sympathoadrenomedullary activity appear to be of intrinsic origin. Blood pressure and heart rate exhibited a diurnal rhythm with a nightly decrease. Arousal and rising from bed increased blood pressure and heart rate significantly. Although the amplitude of the rapid fluctuations of plasma catecholamines at times exceeded those caused by postural changes in the morning, when both plasma norepinephrine and epinephrine levels correlated highly with all cardiovascular parameters, correlations were not significant during recumbency. Thus the intrinsic ultradian fluctuations of plasma catecholamines appear not to be involved in the control of cardiovascular parameters during recumbency, and the increase in blood pressure and heart rate in the morning appears to be controlled by direct sympathetic neural input to the heart and vasculature in response to changes in activity and posture rather than by an endogenous surge of plasma catecholamines.

scholarly journals ESTUDO COMPARATIVO ENTRE OS EFEITOS DA MASSAGEM CLÁSSICA RELAXANTE, MÉTODO IMEDIATT E MASSAGEM YBÁ PARA GESTANTES A PARTIR DO TERCEIRO TRIMESTRE

2019 ◽  
pp. 132-143
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Pregnant Woman ◽  
Pregnant Women ◽  
Vena Cava ◽  
Well Being ◽  
Third Trimester ◽  
Maximum Value ◽  
Postural Changes ◽  
Before And After

Introduction: Gestation is the period of development of a new being. At this stage of a woman's life many hormone-related changes occur. Among these changes are swelling, increased frequency of urination, nausea and sickness, body mass gains, muscle tensions and discomforts. To relieve these discomforts there are different massage techniques on the market. The manual massage for pregnant women, the Imediatt method and the Ybá massage are manual resources that provide a series of benefits to the pregnant woman, each one with its peculiarities. Manual massage provides relief from muscle tensions, decreases anxiety and pain, and produces emotional benefits. The Imediatt massage for pregnant women promotes the improvement of edema and relaxation of the pregnant woman. Ybá massage relaxes the mother and calms the baby through touch, aromatherapy, music therapy and chromotherapy through silk. Objective: To compare the effects of classic relaxing massage, Imediatt method and Ybá massage for pregnant women from the third trimester. Methodology: This comparative and qualitative study consists of applying the three different techniques of massage with data collection (blood pressure, heart rate and perimetry), before and after the procedure, to measure the real benefits of each technique and to compare them . Results: At the end of the massages, heart rate and blood pressure increased, resulting from cardiac output in the gestational period, where it increased (30 to 50%) reaching a maximum value between 20 (twentieth) and 40 (fortieth) week, which makes postural changes more sensitive (due to the fact that the growing uterus compresses the inferior vena cava, decreasing venous return). Conclusion: It was observed after the end of the massages that the methods Relaxing Classical Massage, Ybá Method and Imediatt Method, presented good results in the evaluation for sleep and relief of back pain. In decreasing edema through perimetry the Imediatt Method had better results. In terms of relaxation, the pregnant women reported a better sensation of lightness and connection with the baby, especially for Ybá massage. It was concluded that the pregnant client should receive the massage treatments in this period to promote well-being, relaxation, improve edema and have more connection with the life that is generating.

Sign in / Sign up

Export Citation Format

Share Document