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Cold induced vasodilation

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https://www.readbyqxmd.com/read/28508148/thermographic-skin-temperature-measurement-compared-with-cold-sensation-in-predicting-the-efficacy-and-distribution-of-epidural-anesthesia
#1
Arnoud A Bruins, Kay R J Kistemaker, Annemieke Boom, John H G M Klaessens, Rudolf M Verdaasdonk, Christa Boer
Due to the high rates of epidural failure (3-32%), novel techniques are required to objectively assess the successfulness of an epidural block. In this study we therefore investigated whether thermographic temperature measurements have a higher predictive value for a successful epidural block when compared to the cold sensation test as gold standard. Epidural anesthesia was induced in 61 patients undergoing elective abdominal, thoracic or orthopedic surgery. A thermographic picture was recorded at 5, 10 and 15 min following epidural anesthesia induction...
May 15, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28385914/sympathetic-nervous-system-activation-reduces-contraction-induced-rapid-vasodilation-in-the-leg-of-humans-independent-of-age
#2
William E Hughes, Nicholas T Kruse, Darren P Casey
Contraction-induced rapid vasodilation is attenuated similarly in the upper and lower limbs of older adults. In the forearm, this attenuation is in part due to a greater sympathetic vasoconstriction. We examined whether the age-related reduction in contraction-induced vasodilation in the leg is also due to a sympathetic vasoconstrictive mechanism. Thirteen young (24±1yr) and twelve older adults (67±1yr) performed single leg knee-extension at 20% and 40% of work-rate maximum (WRmax) during control and cold-pressor test (CPT) conditions...
April 6, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28350093/inhibitory-effect-of-angelica%C3%A2-gigas-on-cold%C3%A2-induced-rhoa-activation-in-vascular-cells
#3
Kangwook Lee, Min Soo Chae, Sung-Gook Cho, Ho Yeon Go, Seung-Ho Sun, Junbock Jang, Ki-Yong Jung, You-Kyung Choi, Yun-Kyung Song, Sung Yong Sim, Hye Lim Lee, Mi Suk Kang, Chan-Yong Jeon, Seong Gyu Ko
The herbal extract Angelica gigas (AG) has been applied as a vasodilating agent for patients suffering from vascular diseases for many years; however, the underlying mechanism has not been fully elucidated. The present study hypothesized that the anti‑vasoconstrictive effect of AG may be effective in the treatment of abnormal cold‑mediated vasospasms that occur in Raynaud's phenomenon (RP). The effect of AG on the activity of ras homolog gene family member A (RhoA) was investigated in cold‑exposed vascular cells...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28160059/finger-cold-induced-vasodilation-of-older-korean-female-divers-haenyeo-effects-of-chronic-cold-exposure-and-aging
#4
Joo-Young Lee, Joonhee Park, Eunsook Koh, Seongwon Cha
The aim of the present study was to evaluate the local cold tolerance of older Korean female divers, haenyeo (N = 22) in terms of cold acclimatization and ageing. As control groups, older non-diving females (N = 25) and young females from a rural area (N = 15) and an urban area (N = 51) participated in this study. To evaluate local cold tolerance, finger cold-induced vasodilation (CIVD) during finger immersion of 4 °C water was examined. As a result, older haenyeos showed greater minimum finger temperature and recovery finger temperature than older non-diving females (P < 0...
February 3, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28132862/vasorelaxant-and-cardiovascular-properties-of-the-essential-oil-of-pogostemon-elsholtzioides
#5
Arumugasamy Shiva Kumar, Karnan Jeyaprakash, David Raj Chellappan, Ramar Murugan
ETHNOBOTANICAL RELEVANCE: Pogostemon elsholtzioides Benth. (Lamiaceae) is an aromatic shrub, endemic to eastern Himalaya region. The leaves are used for treating goiter and high blood pressure (BP) by indigenous people in Arunachal Pradesh, India. Young leaves are used as vegetable and leaf decoction is also used for cough, cold and headache by some indigenous communities in Northeast India. AIM OF THE STUDY: This species is used for treating hypertension and the genus Pogostemon is rich in essential oil...
January 26, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28108308/role-of-cyclooxygenase-in-the-vascular-response-to-locally-delivered-acetylcholine-in-caucasian-and-african-descent-individuals
#6
Matthew J Maley, James R House, Michael J Tipton, Clare M Eglin
INTRODUCTION: Individuals of African descent (AFD) are more susceptible to non-freezing cold injury (NFCI) compared with Caucasian individuals (CAU). Vasodilatation to acetylcholine (ACh) is lower in AFD compared with CAU in the non-glabrous foot and finger skin sites; the reason for this is unknown. Prostanoids are responsible, in part, for the vasodilator response to ACh, however it is not known whether the contribution differs between ethnicities. METHODS: 12 CAU and 12 AFD males received iontophoresis of ACh (1 w/v%) on non-glabrous foot and finger skin sites following placebo and then aspirin (600mg, single blinded)...
May 2017: Microvascular Research
https://www.readbyqxmd.com/read/27932205/cold-induced-sympathetic-tone-modifies-the-impact-of-endothelium-dependent-vasodilation-in-the-finger-pulp
#7
Tone Kristin Bergersen, Maria Skytioti, Maja Elstad
OBJECTIVE: In thermoneutral and cold subjects, the sympathetic nervous system regulates skin blood flow by adjusting frequency of the tonic vasoconstrictor impulses. However, the way these thermoregulatory impulses influence the vascular endothelium is not well known. We studied how the sympathetic nervous system influences endothelium-dependent vasodilation (EDV) caused by shear stress in skin containing arteriovenous anastomoses (AVAs) and arterioles in healthy subjects. METHODS: Thirteen healthy subjects were exposed to thermoneutral (29°C) and cold (22°C) ambient temperatures on separate days...
November 30, 2016: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/27812317/trigeminal-cardiac-reflex-and-cerebral-blood-flow-regulation
#8
REVIEW
Dominga Lapi, Rossana Scuri, Antonio Colantuoni
The stimulation of some facial regions is known to trigger the trigemino-cardiac reflex: the main stimulus is represented by the contact of the face with water. This phenomenon called diving reflex induces a set of reactions in the cardiovascular and respiratory systems occurring in all mammals, especially marine (whales, seals). During the immersion of the face in the water, the main responses are aimed at reducing the oxygen consumption of the organism. Accordingly reduction in heart rate, peripheral vasoconstriction, blood pooling in certain organs, especially the heart, and brain and an increase in blood pressure have been reported...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27708614/diving-response-in-rats-role-of-the-subthalamic-vasodilator-area
#9
Eugene V Golanov, James M Shiflett, Gavin W Britz
Diving response (DR) is a powerful integrative response targeted toward survival of the hypoxic/anoxic conditions. Being present in all animals and humans, it allows to survive adverse conditions like diving. Earlier, we discovered that forehead stimulation affords neuroprotective effect, decreasing infarction volume triggered by permanent occlusion of the middle cerebral artery in rats. We hypothesized that cold stimulation of the forehead induces DR in rats, which, in turn, exerts neuroprotection. We compared autonomic [AP, heart rate (HR), cerebral blood flow (CBF)] and EEG responses to the known DR-triggering stimulus, ammonia stimulation of the nasal mucosa, cold stimulation of the forehead, and cold stimulation of the glabrous skin of the tail base in anesthetized rats...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27590457/myocardial-microvascular-responsiveness-during-acute-cardiac-sympathectomy-induced-by-thoracic-epidural-anesthesia
#10
Carolien S E Bulte, Christa Boer, Koen J Hartemink, Otto Kamp, Martijn W Heymans, Stephen A Loer, Stefano F de Marchi, Rolf Vogel, R Arthur Bouwman
OBJECTIVE: To evaluate the effect of acute cardiac sympathectomy by thoracic epidural anesthesia on myocardial blood flow and microvascular function. DESIGN: A prospective observational study. SETTING: The study was conducted in a tertiary teaching hospital. PARTICIPANTS: Ten patients with a mean age of 48 years (range 22-63 years) scheduled for thoracic surgery. INTERVENTIONS: Myocardial contrast echocardiography was used to study myocardial blood flow and microvascular responsiveness at rest, during adenosine-induced hyperemia, and after sympathetic stimulation by the cold pressor test...
May 25, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27421220/raynaud-s-phenomenon
#11
REVIEW
Michael Hughes, Ariane L Herrick
Raynaud's phenomenon (RP) is a major cause of pain and disability in patients with autoimmune connective tissue diseases (CTDs), particularly systemic sclerosis (SSc). The clinician must perform a comprehensive clinical assessment in patients with RP to differentiate between primary (idiopathic) and secondary RP, in particular (for rheumatologists), secondary to an autoimmune CTD, as both the prognosis and treatment may differ significantly. Key investigations are nailfold capillaroscopy and testing for autoantibodies (in particular, those associated with SSc)...
February 2016: Best Practice & Research. Clinical Rheumatology
https://www.readbyqxmd.com/read/27357717/nailfold-capillaroscopy-assessment-of-microcirculation-abnormalities-and-endothelial-dysfunction-in-children-with-primary-or-secondary-raynaud-syndrome
#12
Joanna Latuskiewicz-Potemska, Antonina Chmura-Skirlinska, Ryszard J Gurbiel, Elzbieta Smolewska
Raynaud syndrome (RS) manifests as episodes of transient spasms of peripheral blood vessels, most often in response to cold. The reason of that symptom (primary RS (pRS)) usually cannot be found but may be accompanied by some autoimmune diseases (secondary RS (sRS)). In this study, we assessed microcapillary status and serum concentrations of chosen cytokines, adhesive molecules, and nitric oxide (NO) in patients with pRS and sRS in comparison with healthy children. Eighty-six patients with RS were enrolled into the study, including 52 with pRS and 34 with sRS...
August 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27262300/trpa1-and-trpm8-receptors-may-promote-local-vasodilation-that-aggravates-oxaliplatin-induced-peripheral-neuropathy-amenable-to-17%C3%AE-estradiol-treatment
#13
Yuwei Pan, Si Huang, Zejian Cai, Hai Lan, Yi Tong, Xuan Yu, Guoping Zhao, Fengguo Chen
Oxaliplatin is a widely used chemotherapeutic agent that induces both acute and chronic peripheral neuropathy. Based on previous research indicating that estrogen replacement may attenuate some forms of pain in ovariectomized animals, we examined the effects of 17β-estradiol in OXAIPN. We discovered that local cold exposure induces an abnormal vascular response in both acute and chronic models of OXAIPN (oxaliplatin-induced peripheral neuropathy) that may be used as an easy and non-invasive method to predict which patients may be susceptible to the development of severe, chronic OXAIPN...
June 1, 2016: Current Neurovascular Research
https://www.readbyqxmd.com/read/27237065/comparison-of-transpulmonary-thermodilution-and-calibrated-pulse-contour-analysis-with-pulmonary-artery-thermodilution-cardiac-output-measurements-in-anesthetized-dogs
#14
N A Garofalo, F J Teixeira-Neto, J C Rodrigues, S A Cerejo, A J A Aguiar, D R Becerra-Velásquez
BACKGROUND: Transpulmonary thermodilution (TPTDCO ) and calibrated pulse contour analysis (PCACO ) are alternatives to pulmonary artery thermodilution cardiac output (PATDCO ) measurement. HYPOTHESIS: Ten mL of ice-cold thermal indicator (TI10 ) would improve the agreement and trending ability between TPTDCO and PATDCO compared to 5 mL of indicator (TI5 ) (Phase-1). The agreement and TA between PCACO and PATDCO would be poor during changes in systemic vascular resistance (SVR) (Phase-2)...
July 2016: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/27227100/human-whole-body-cold-adaptation
#15
REVIEW
Hein A M Daanen, Wouter D Van Marken Lichtenbelt
Reviews on whole body human cold adaptation generally do not distinguish between population studies and dedicated acclimation studies, leading to confusing results. Population studies show that indigenous black Africans have reduced shivering thermogenesis in the cold and poor cold induced vasodilation in fingers and toes compared to Caucasians and Inuit. About 40,000 y after humans left Africa, natives in cold terrestrial areas seems to have developed not only behavioral adaptations, but also physiological adaptations to cold...
January 2016: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/27141944/cold-induced-vasodilation-comparison-between-bangladeshi-and-japanese-natives
#16
COMPARATIVE STUDY
Aklima Khatun, Sakura Ashikaga, Hisaho Nagano, Md Abdul Hasib, Akihiro Taimura
BACKGROUND: The human thermoregulation system responds to changes in environmental temperature, so humans can self-adapt to a wide range of climates. People from tropical and temperate areas have different cold tolerance. This study compared the tolerance of Bangladeshi (tropical) and Japanese (temperate) people to local cold exposure on cold-induced vasodilation (CIVD). METHODS: Eight Bangladeshi males (now residing in Japan) and 14 Japanese males (residing in Japan) participated in this study...
2016: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/26810858/relation-between-temperature-extremes-and-symptom-exacerbation-in-patients-with-hypertrophic-cardiomyopathy
#17
COMPARATIVE STUDY
John P Bois, Jonathon C Adams, Gautam Kumar, Steve R Ommen, Rick A Nishimura, Kyle W Klarich
Warm temperatures induce peripheral vasodilation, decrease afterload, and may concurrently increase the left ventricular outflow tract (LVOT) gradient. We aimed to assess the impact of subjective ambient temperature on hypertrophic cardiomyopathy (HC) symptoms and determine whether they were associated with LVOT gradient, patient quality of life (QOL), and risk of sudden cardiac death (SCD). We identified consecutive patients with HC presenting to a tertiary referral center. Of the 173 patients in the study, 143 (83%) had HC symptoms, with ambient temperature change worsening symptoms for 72 patients (50%)...
March 15, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/26547635/pathophysiological-mechanisms-involved-in-vasomotor-disturbances-in-complex-regional-pain-syndrome-and-implications-for-therapy-a-review
#18
REVIEW
Minke C Kortekaas, Sjoerd P Niehof, Robert J Stolker, Frank J P M Huygen
Complex regional pain syndrome (CRPS) is characterized by continuous pain, disproportional to the initial trauma. It usually spreads to the distal parts of the affected limb. Besides continuing pain, a mix of sensory, sudo- and vasomotor disturbances, motor dysfunction, and trophic changes is responsible for physical complaints. Vasomotor disturbance is characterized by changes in skin temperature and color. In CRPS patients with a cold extremity, a decrease in blood flow can cause decreased tissue saturation and tissue acidosis, resulting in ischemic pain...
September 2016: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/26334585/acute-hypobaric-hypoxia-effects-on-finger-temperature-during-and-after-local-cold-exposure
#19
Catherine O'Brien, John W Castellani, Stephen R Muza
Mountain environments have combined stressors of lower ambient temperature and hypoxia. Cold alone can reduce finger temperature, resulting in discomfort, impaired dexterity, and increased risk of cold injury. Whether hypobaric hypoxia exacerbates these effects is unclear. To examine this, finger temperature responses to two cold water immersion tests were measured at sea level (SL, 99 kPa), 3000 m (70 kPa), and 4675 m (56 kPa) at the same air temperature (22°-23°C). Nine males sat quietly for 30 min, then completed the tests in balanced order...
September 2015: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/26159763/effect-of-short-term-exercise-heat-acclimation-on-ventilatory-and-cerebral-blood-flow-responses-to-passive-heating-at-rest-in-humans
#20
Naoto Fujii, Bun Tsuji, Yasushi Honda, Narihiko Kondo, Takeshi Nishiyasu
Hyperthermia induces hyperventilation and cerebral hypoperfusion in resting humans. We tested the hypothesis that short-term exercise-heat acclimation would alleviate those effects. Twenty healthy male subjects were divided into two groups that performed exercise training in the heat (TR-HEAT, n = 10) or cold (TR-COLD, n = 10). Before and after the training, the subjects in both groups participated in passive-heat tests at rest. Training was performed at 37°C (TR-HEAT) or 10°C (TR-COLD) and entailed four 20-min bouts of cycling at 50% peak oxygen uptake separated by 10-min recoveries daily for 6 consecutive days...
September 1, 2015: Journal of Applied Physiology
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