scholarly journals Carotid baroreceptor stimulation in obese rats affects white and brown adipose tissues differently in metabolic protection

2019 ◽  
Vol 60 (7) ◽  
pp. 1212-1224 ◽  
Author(s):  
Quan Cao ◽  
Junxia Zhang ◽  
Qiao Yu ◽  
Jing Wang ◽  
Mingyan Dai ◽  
...  
Keyword(s):  
Adipose Tissues ◽  
Carotid Baroreceptor ◽  
Brown Adipose ◽  
Obese Rats ◽  
Baroreceptor Stimulation ◽  
Carotid Baroreceptor Stimulation

Effects of carotid baroreceptor stimulation on aortic remodeling in obese rats

2021 ◽  
Vol 31 (5) ◽  
pp. 1635-1644
Author(s):  
Qiao Yu ◽  
Ling Shu ◽  
Lang Wang ◽  
Kaile Gao ◽  
Jing Wang ◽  
...  
Keyword(s):  
Carotid Baroreceptor ◽  
Obese Rats ◽  
Baroreceptor Stimulation ◽  
Aortic Remodeling ◽  
Carotid Baroreceptor Stimulation

The Role of Carotid Baroreceptor Stimulation

2013 ◽  
pp. 137-144
Author(s):  
Guido Grassi ◽  
Gianmaria Brambilla ◽  
Gino Seravalle
Keyword(s):  
Carotid Baroreceptor ◽  
Baroreceptor Stimulation ◽  
Carotid Baroreceptor Stimulation

scholarly journals Electrical carotid baroreceptor stimulation

2014 ◽  
Vol 164 (23-24) ◽  
pp. 508-514 ◽  
Author(s):  
Jürg Schmidli ◽  
Regula S. von Allmen ◽  
Markus G. Mohaupt
Keyword(s):  
Carotid Baroreceptor ◽  
Baroreceptor Stimulation ◽  
Carotid Baroreceptor Stimulation

Cardiac autonomic control during balloon carotid angioplasty and stenting

2003 ◽  
Vol 81 (10) ◽  
pp. 944-951 ◽  
Author(s):  
Laurence Mangin ◽  
Claire Medigue ◽  
Jean-Claude Merle ◽  
Isabelle Macquin-Mavier ◽  
Philippe Duvaldestin ◽  
...  
Keyword(s):  
Heart Rate ◽  
Internal Carotid ◽  
Autonomic Control ◽  
Frequency Domain Method ◽  
Carotid Angioplasty ◽  
Sinus Arrhythmia ◽  
Time Frequency ◽  
Carotid Baroreceptor ◽  
Baroreceptor Stimulation ◽  
Carotid Baroreceptor Stimulation

Hemodynamic alterations during balloon carotid angioplasty (BCA) and stenting have been ascribed to the consequences of direct carotid baroreceptor stimulation during balloon inflation. BCA with stenting in patients with carotid atheromatous stenoses offers a unique opportunity for elucidating the cardiovascular autonomic response to direct transient intravascular stimulation of the baroreceptors. We analysed the consequences of BCA on the autonomic control of heart rate and on breathing components in nine patients with atheromatous stenoses involving the bifurcation and the internal carotid. A time–frequency domain method, the smoothed pseudo-Wigner–Ville transform (SPWVT), was used to evaluate the spectral parameters (i.e., the instantaneous amplitude and centre frequency (ICF) of the cardiovascular and respiratory oscillations). Those parameters and their dynamics (8 and 24 h later) were evaluated during and after the procedure. BCA stimulates baroreceptors in all patients, which markedly reduces heart rate and blood pressure. Vagal baroreflex activation altered the respiratory sinus arrhythmia in terms of amplitude and frequency (ICF HF RR shifted from 0.27 ± 0.03 to 0.23 ± 0.04 Hz pre-BCA vs. BCA, respectively; p < 0.01). Both the high- and low-frequency amplitudes of heart rate oscillations were altered during carotid baroreceptor stimulation, strongly supporting a contribution of the baroreflex to the generation of both oscillations of heart rate. Carotid baroreceptors stimulation increased the inspiratory time (Ti) (1.5 ± 0.5 to 2.3 ± 0.6 s pre-BCA vs. BCA, respectively; p < 0.01). In awake patients, BCA with stenting of atheromatous stenosis involving the bifurcation and internal carotid causes marked changes in the cardiac autonomic and respiratory control systems.Key words: carotid angioplasty, heart rate variability, autonomic nervous system, respiration, spectral analysis.

Central volume expansion is pivotal for sustained decrease in heart rate during seated to supine posture change

2001 ◽  
Vol 281 (3) ◽  
pp. H1274-H1279 ◽  
Author(s):  
Bettina Pump ◽  
Tsutomu Kamo ◽  
Anders Gabrielsen ◽  
Peter Bie ◽  
Niels Juel Christensen ◽  
...  
Keyword(s):  
Heart Rate ◽  
Pulse Pressure ◽  
Volume Expansion ◽  
Arterial Pulse ◽  
Carotid Baroreceptor ◽  
Posture Change ◽  
Arterial Pulse Pressure ◽  
Baroreceptor Stimulation ◽  
Central Volume ◽  
Carotid Baroreceptor Stimulation

During prolonged, static carotid baroreceptor stimulation by neck suction (NS) in seated humans, heart rate (HR) decreases acutely and thereafter gradually increases. This increase has been explained by carotid baroreceptor adaptation and/or buffering by aortic reflexes. During a posture change from seated to supine (Sup) with similar carotid stimulation, however, the decrease in HR is sustained. To investigate whether this discrepancy is caused by changes in central blood volume, we compared ( n = 10 subjects) the effects of 10 min of seated NS (adjusted to simulate carotid stimulation of a posture change), a posture change from seated to Sup, and the same posture change with left atrial (LA) diameter maintained unchanged by lower body negative pressure (Sup + LBNP). During Sup, the prompt decreases in HR and mean arterial pressure (MAP) were sustained. HR decreased similarly within 30 s of NS (65 ± 2 to 59 ± 2 beats/min) and Sup + LBNP (65 ± 2 to 58 ± 2 beats/min) and thereafter gradually increased to values of seated. MAP decreased similarly within 5 min during Sup + LBNP and NS (by 7 ± 1 to 9 ± 1 mmHg) and thereafter tended to increase toward values of seated subjects. Arterial pulse pressure was increased the most by Sup, less so by Sup + LBNP, and was unchanged by NS. LA diameter was only increased by Sup. In conclusion, static carotid baroreceptor stimulation per se causes the acute (<30 s) decrease in HR during a posture change from seated to Sup, whereas the central volume expansion (increased LA diameter and/or arterial pulse pressure) is pivotal to sustain this decrease. Thus the effects of central volume expansion override adaptation of the carotid baroreceptors and/or buffering of aortic reflexes.

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