Baroreflex

Publication Title: 
Indian Journal of Physiology and Pharmacology

Slow, deep, pranayama-based breathing training has been shown to be effective in reducing blood pressure (BP). The present study was undertaken to determine immediate effects of performing pranava pranayama on cardiovascular parameters in hypertensive patients. 29 hypertensive patients who were on medical treatment and also attending yoga sessions were recruited for the present study. Supine heart rate (HR) and BP were recorded before and after performance of pranava pranayama for five minutes.

Author(s): 
Bhavanani, Ananda Balayogi
Madanmohan, null
Sanjay, Zeena
Basavaraddi, Ishwar V.
Publication Title: 
BMJ (Clinical research ed.)

OBJECTIVE: To test whether rhythmic formulas such as the rosary and yoga mantras can synchronise and reinforce inherent cardiovascular rhythms and modify baroreflex sensitivity. DESIGN: Comparison of effects of recitation of the Ave Maria (in Latin) or of a mantra, during spontaneous and metronome controlled breathing, on breathing rate and on spontaneous oscillations in RR interval, and on blood pressure and cerebral circulation. SETTING: Florence and Pavia, Italy. PARTICIPANTS: 23 healthy adults.

Author(s): 
Bernardi, L.
Sleight, P.
Bandinelli, G.
Cencetti, S.
Fattorini, L.
Wdowczyc-Szulc, J.
Lagi, A.
Publication Title: 
European Journal of Clinical Investigation

It is unclear whether the age-associated reduction in baroreflex sensitivity is modifiable by exercise training. The effects of aerobic exercise training and yoga, a non-aerobic control intervention, on the baroreflex of elderly persons was determined. Baroreflex sensitivity was quantified by the alpha-index, at high frequency (HF; 0.15-0.35 Hz, reflecting parasympathetic activity) and mid-frequency (MF; 0.05-0.15 Hz, reflecting sympathetic activity as well), derived from spectral and cross-spectral analysis of spontaneous fluctuations in heart rate and blood pressure.

Author(s): 
Bowman, A. J.
Clayton, R. H.
Murray, A.
Reed, J. W.
Subhan, M. M.
Ford, G. A.
Publication Title: 
BMJ (Clinical research ed.)

OBJECTIVE: To test whether rhythmic formulas such as the rosary and yoga mantras can synchronise and reinforce inherent cardiovascular rhythms and modify baroreflex sensitivity. DESIGN: Comparison of effects of recitation of the Ave Maria (in Latin) or of a mantra, during spontaneous and metronome controlled breathing, on breathing rate and on spontaneous oscillations in RR interval, and on blood pressure and cerebral circulation. SETTING: Florence and Pavia, Italy. PARTICIPANTS: 23 healthy adults.

Author(s): 
Bernardi, L.
Sleight, P.
Bandinelli, G.
Cencetti, S.
Fattorini, L.
Wdowczyc-Szulc, J.
Lagi, A.
Publication Title: 
BMJ (Clinical research ed.)

OBJECTIVE: To test whether rhythmic formulas such as the rosary and yoga mantras can synchronise and reinforce inherent cardiovascular rhythms and modify baroreflex sensitivity. DESIGN: Comparison of effects of recitation of the Ave Maria (in Latin) or of a mantra, during spontaneous and metronome controlled breathing, on breathing rate and on spontaneous oscillations in RR interval, and on blood pressure and cerebral circulation. SETTING: Florence and Pavia, Italy. PARTICIPANTS: 23 healthy adults.

Author(s): 
Bernardi, L.
Sleight, P.
Bandinelli, G.
Cencetti, S.
Fattorini, L.
Wdowczyc-Szulc, J.
Lagi, A.
Publication Title: 
Journal of Biomedical Science

Perinatal taurine depletion and high sugar diets blunted baroreflex function and heightens sympathetic nerve activity in adult rats. Cardiac ischemia/reperfusion also produces these disorders and taurine treatment appears to improve these effects. This study tests the hypothesis that perinatal taurine exposure predisposes recovery from reperfusion injury in rats on either a basal or high sugar diet.

Author(s): 
Kulthinee, Supaporn
Wyss, J. Michael
Jirakulsomchok, Dusit
Roysommuti, Sanya
Publication Title: 
Journal of Biomedical Science

Perinatal taurine depletion leads to several physiological impairments in adult life, in part, due to taurine's effects on the renin-angiotensin system, a crucial regulator of growth and differentiation during early life. The present study tests the hypothesis that perinatal taurine depletion predisposes adult female rats to impaired baroreceptor control of arterial pressure by altering the renin-angiotensin system. Female Sprague Dawley (SD) rats were fed normal rat chow and from conception to weaning drank 3% beta-alanine in water (taurine depletion, TD) or water alone (Control, C).

Author(s): 
Thaeomor, Atcharaporn
Wyss, J. Michael
Jirakulsomchok, Dusit
Roysommuti, Sanya
Publication Title: 
Lancet

Carotid sinus hypersensitivity (CSH) is recognised in up to 45% of elderly patients with syncope, falls, and dizziness that may not be attributed to specific myocardial sinus node dysfunction, various diseases that affect pacemaker activity, cardiac output and blood supply to the brain. The pathophysiology of CSH is unclear but it is associated with ageing, hypertension, and ischaemic heart disease. CSH is potentially treatable with dual chamber pacing for prolonged sinus arrest (cardio-inhibitory CSH) but therapy for the more prevalent hypotension (vasodepressor CSH) is unsatisfactory.

Author(s): 
O'Mahony, D.
Publication Title: 
BMJ (Clinical research ed.)

OBJECTIVE: To test whether rhythmic formulas such as the rosary and yoga mantras can synchronise and reinforce inherent cardiovascular rhythms and modify baroreflex sensitivity. DESIGN: Comparison of effects of recitation of the Ave Maria (in Latin) or of a mantra, during spontaneous and metronome controlled breathing, on breathing rate and on spontaneous oscillations in RR interval, and on blood pressure and cerebral circulation. SETTING: Florence and Pavia, Italy. PARTICIPANTS: 23 healthy adults.

Author(s): 
Bernardi, L.
Sleight, P.
Bandinelli, G.
Cencetti, S.
Fattorini, L.
Wdowczyc-Szulc, J.
Lagi, A.
Publication Title: 
Journal of Manipulative and Physiological Therapeutics

OBJECTIVE: To determine differences in peripheral and cardiovascular autonomic function between individuals with acute musculoskeletal injury (<1 week) and healthy controls. METHODS: Autonomic cardiovascular modulation, baroreceptor sensitivity, skin conductance, and peripheral skin temperature were obtained in 6 subjects with acute musculoskeletal injury and 6 age- and sex-matched controls. Power spectral analysis was performed on both beat-to-beat R-R intervals and continuous systolic blood pressure (SBP) peaks.

Author(s): 
Grimm, David R.
Cunningham, Brian M.
Burke, Jeanmarie R.

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