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https://www.readbyqxmd.com/read/28104014/-individualized-treatment-of-bilateral-carotid-body-tumor
#1
Y R Feng, X H Chen, X J Kou, Y L Bai, F Q Lu, J Yang, B C Wang
Objective: To investigate individualized therapeutic strategy for bilateral carotid body tumors. Methods: Clinical data of 16 patients with bilateral carotid body tumor treated from January 2003 to August 2016 were retrospectively studied. Of the 16 patients, 9 were males and 7 were females; 5 were sporadic and 11 were familial; 8 cases were observed, 1 cases was malignant and treated with chemotherapy, and 7 cases were treated with surgery. The treatment course, perioperative complications and clinical efficacy were assessed...
January 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28094772/cardiac-afferent-activity-modulates-the-expression-of-racial-stereotypes
#2
Ruben T Azevedo, Sarah N Garfinkel, Hugo D Critchley, Manos Tsakiris
Negative racial stereotypes tend to associate Black people with threat. This often leads to the misidentification of harmless objects as weapons held by a Black individual. Yet, little is known about how bodily states impact the expression of racial stereotyping. By tapping into the phasic activation of arterial baroreceptors, known to be associated with changes in the neural processing of fearful stimuli, we show activation of race-threat stereotypes synchronized with the cardiovascular cycle. Across two established tasks, stimuli depicting Black or White individuals were presented to coincide with either the cardiac systole or diastole...
January 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28091857/lack-of-heart-rate-variability-during-sleep-related-apnea-in-patients-with-temporal-lobe-epilepsy-tle-an-indirect-marker-of-sudep
#3
C S Nayak, S Sinha, M Nagappa, K Thennarasu, A B Taly
PURPOSE: Apneas occurring during sleep may precipitate autonomic instability in epilepsy patients making them susceptible to sudden death (SUDEP). Literature on heart rate variability (HRV) during apnea among patients with temporal lobe epilepsy (TLE) is sparse. The aim of this study was to characterize the HRV during the peri-apneic period in patients with TLE and compare with HRV of matched healthy individuals during the overnight polysomnographic (PSG) recording. Further, the role of carbamazepine (CBZ) in modulating peri-apneic HRV in the above cohort was also assessed...
January 14, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28088272/comparison-of-renal-pelvic-pressure-and-postoperative-fever-incidence-between-standard-and-mini-tract-percutaneous-nephrolithotomy
#4
Cheng Wu, Li-Xin Hua, Jian-Zhong Zhang, Xun-Rong Zhou, Wei Zhong, Hao-Dong Ni
This study was proposed to compare the clinical effectiveness of mini-tract percutaneous nephrolithotomy (MPCNL) with standard-tract percutaneous nephrolithotomy (SPCNL) and verify whether MPCNL is associated with both higher renal pelvic pressure (RPP) and incidence of postoperative fever. A total of 228 patients with kidney stone were randomly allocated to the MPCNL group (n=114) and SPCNL group (n=114). Both intraoperative and postoperative indexes along with the incidence of complications were compared between the two treatment groups...
January 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/28079146/nitrosative-stress-induced-disruption-of-baroreflex-neural-circuits-in-a-rat-model-of-hepatic-encephalopathy-a-dti-study
#5
Ching-Yi Tsai, Chia-Hao Su, Julie Y H Chan, Samuel H H Chan
The onset of hepatic encephalopathy (HE) in liver failure is associated with high mortality; the underlying mechanism is undecided. Here we report that in an acute liver failure model employing intraperitoneal administration of thioacetamide in Sprague-Dawley rats, diffusion weighted imaging revealed a progressive reduction in apparent diffusion coefficient in the brain stem. Diffusion tensor imaging further showed that the connectivity between nucleus tractus solitarii (NTS), the terminal site of baroreceptor afferents in brain stem and rostral ventrolateral medulla (RVLM), the origin of sympathetic innervation of blood vessels, was progressively disrupted until its disappearance, coincidental with the irreversible cessation of baroreflex-mediated sympathetic vasomotor tone signifying clinically the occurrence of brain death...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28056741/synaptic-inputs-of-neural-afferent-pathways-to-vasopressin-and-oxytocin-secreting-neurons-of-supraoptic-and-paraventricular-hypothalamic-nuclei
#6
Michele Iovino, Vito Angelo Giagulli, Brunella Licchelli, Emanuela Iovino, Edoardo Guastamacchia, Vincenzo Triggiani
Magnocellular neurosecretory neurons of the hypothalamic supraoptic (SON) and paraventricular (PVN) nuclei synthesize vasopressin and oxytocin in response to signals generated by osmoreceptors and baroreceptors and, respectively, coming from receptors of the nipples and cervix. These signals reach SON and PVN neurons via multisynaptic pathways involving several neurotransmitters and neuropeptides. Aim of this paper is the topographic description of particular afferent pathways involved in the regulation of VPergic and OTergic neurons and their synaptic inputs inducing the stimulus-secretion-coupling...
January 4, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28039403/from-supine-to-standing-in%C3%A2-vivo-segregation-of-myogenic-and-baroreceptor-vasoconstriction-in-humans
#7
Bruno Estañol, Ana Leonor Rivera, Raúl Martínez Memije, Ruben Fossion, Fermín Gómez, Katherine Bernal, Sofía Murúa Beltrán, Guillermo Delgado-García, Alejandro Frank
Myogenic vascular response is a form of systemic and regional vasoconstriction produced increasing the intra-arterial pressure by gravity. Here, the vasoconstriction due to the myogenic response, induced by the gravitational action in a dependent limb, is separated from that caused by the baroreceptor reflex. Regional changes of skin blood flow (SBF), total blood volume of the finger (TBVF), pulse pressure (PP), heart rate (HR), systolic, and diastolic blood pressure (BP) were analyzed in 10 healthy young subjects in supine and upright positions...
December 2016: Physiological Reports
https://www.readbyqxmd.com/read/28005704/the-antioxidant-effects-of-green-tea-reduces-blood-pressure-and-sympathoexcitation-in-an-experimental-model-of-hypertension
#8
Michelle L Garcia, Roberto B Pontes, Erika E Nishi, Flávia K Ibuki, Vanessa Oliveira, Alexandra C H Sawaya, Patrícia O Carvalho, Fernando N Nogueira, Maria do Carmo Franco, Ruy R Campos, Lila M Oyama, Cássia T Bergamaschi
BACKGROUND: Oxidative stress is a key mediator in the maintenance of sympathoexcitation and hypertension in human and experimental models. Green tea is widely known to be potent antioxidant. OBJECTIVE: We aimed to evaluate the effects of green tea in a model of hypertension. METHODS: Hypertension was induced by the nitric oxide synthase inhibitor [N-nitro-L-arginine-methyl-ester (L-NAME); 20 mg/kg per day, orally, for 2 weeks] in male Wistar rats...
February 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/27957483/is-there-an-association-between-altered-baroreceptor-sensitivity-and-obstructive-sleep-apnoea-in-the-healthy-elderly
#9
Emilia Sforza, Magali Saint Martin, Jean Claude Barthélémy, Frédéric Roche
Obstructive sleep apnoea (OSA) is associated with a rise in cardiovascular risk in which increased sympathetic activity and depressed baroreceptor reflex sensitivity (BRS) have been proposed. We examined this association in a sample of healthy elderly subjects with unrecognised OSA. 801 healthy elderly (aged ≥65 years) subjects undergoing clinical, respiratory polygraphy and vascular assessment were examined. According to the apnoea-hypopnoea index (AHI), the subjects were stratified into no OSA, mild-moderate OSA and severe OSA cases...
July 2016: ERJ Open Research
https://www.readbyqxmd.com/read/27941230/the-possible-role-of-the-vagal-nervous-system-in-the-recovery-of-the-blood-pressure-control-after-cardiac-arrest-a-porcine-model-study
#10
Mario Lavanga, Giuseppe Baselli, Francesca Fumagalli, Giuseppe Ristagno, Manuela Ferrario
Previous studies have proved that the baroreceptor reflex (baroreflex) control of heart rate can be used for stratification of post-infarction population and, in general, cardiovascular disease populations. Many methods have been proposed to estimate the so-called baroreflex sensitivity (BRS) expressed as ms mmhg(-1). Most of the studies that exploit BRS focus mainly on acute myocardial infarction (AMI) and there are no important works that investigate the role of BRS immediately after cardiac arrest (CA). The present work is a continuation of the published work of Ristagno et al (2014 Shock 41 72-8)...
January 2017: Physiological Measurement
https://www.readbyqxmd.com/read/27895591/comparison-in-conscious-rabbits-of-the-baroreceptor-heart-rate-reflex-effects-of-chronic-treatment-with-rilmenidine-moxonidine-and-clonidine
#11
Monique L Parkin, Kyungjoon Lim, Sandra L Burke, Geoffrey A Head
We investigated the effects of chronic subcutaneous treatment with centrally-acting antihypertensive agents moxonidine, rilmenidine, and clonidine on the baroreflex control of heart rate (HR) in conscious normotensive rabbits over 3 weeks. Infusions of phenylephrine and nitroprusside were performed at week 0 and at weeks 1 and 3 of treatment to determine mean arterial pressure (MAP)-HR baroreflex relationships. A second curve was performed after intravenous methscopolamine to determine the sympathetic baroreflex relationship...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27895136/recognition-and-management-of-resistant-hypertension
#12
REVIEW
Branko Braam, Sandra J Taler, Mahboob Rahman, Jennifer A Fillaus, Barbara A Greco, John P Forman, Efrain Reisin, Debbie L Cohen, Mohammad G Saklayen, S Susan Hedayati
Despite improvements in hypertension awareness and treatment, 30%-60% of hypertensive patients do not achieve BP targets and subsequently remain at risk for target organ damage. This therapeutic gap is particularly important to nephrologists, who frequently encounter treatment-resistant hypertension in patients with CKD. Data are limited on how best to treat patients with CKD and resistant hypertension, because patients with CKD have historically been excluded from hypertension treatment trials. First, we propose a consistent definition of resistant hypertension as BP levels confirmed by both in-office and out-of-office measurements that exceed appropriate targets while the patient is receiving treatment with at least three antihypertensive medications, including a diuretic, at dosages optimized to provide maximum benefit in the absence of intolerable side effects...
November 28, 2016: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/27885177/-response-to-mechanical-stimulus-and-cardiovascular-homeostasis
#13
Ken Takahashi, Keiji Naruse
Response to mechanical stimulus, including blood pressure regulation as a typical example, is essential for cardiovascular homeostasis. Traditionally, mechanism of blood pressure regulation can be divided into two categories:short term neural regulation via arterial baroreceptor reflex and long term humoral regulation via renin-angiotensin system. Recent studies have revealed that sensitivity of baroreceptor reflex is impaired in metabolic syndrome and aging. Moreover, it is suggested that the baroreceptor reflex is involved in long term blood pressure regulation...
2016: Clinical Calcium
https://www.readbyqxmd.com/read/27881668/restoration-of-thermoregulation-after-exercise
#14
Glen P Kenny, Ryan McGinn
Performing exercise, especially in the hot conditions, can heat the body causing significant increases in internal body temperature. To offset this increase, powerful and highly developed autonomic thermoregulatory responses (i.e., skin blood flow and sweating) are activated to enhance whole-body heat loss; a response mediated by temperature sensitive receptors in both the skin and the internal core regions of the body. Independent of thermal control of heat loss, nonthermal factors can have profound consequences on the body's ability to dissipate heat during exercise...
November 23, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27861895/effects-of-postural-change-from-supine-to-head-up-tilt-on-the-skin-sympathetic-nerve-activity-component-synchronised-with-the-cardiac-cycle-in-warmed-men
#15
Yu Ogawa, Yoshi-Ichiro Kamijo, Shigeki Ikegawa, Shizue Masuki, Hiroshi Nose
KEY POINTS: Humans are unique in controlling body temperature in a hot environment by a large amount of skin blood flow; however, the decrease in total peripheral resistance due to systemic cutaneous vasodilatation and the reduction of venous return to the heart due to blood pooling in the cutaneous vein threatens blood pressure maintenance in the upright position, and occasionally causes heat syncope. Against this condition, cutaneous vasodilatation is reportedly suppressed to maintain arterial pressure; however, the nerve activity responsible for this phenomenon has not been identified...
November 8, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27835975/empagliflozin-lessened-cardiac-injury-and-reduced-visceral-adipocyte-hypertrophy-in-prediabetic-rats-with-metabolic-syndrome
#16
Hiroaki Kusaka, Nobutaka Koibuchi, Yu Hasegawa, Hisao Ogawa, Shokei Kim-Mitsuyama
BACKGROUND: The potential benefit of SGLT2 inhibitors in metabolic syndrome is with prediabetic stage unclear. This work was undertaken to investigate the non-glycemic effect of empagliflozin on metabolic syndrome rats with prediabetes. METHODS: SHR/NDmcr-cp(+/+) rats (SHRcp), a model of metabolic syndrome with prediabetes, were given empagliflozin for 10 weeks to examine the effects on urinary sodium and water balance, visceral and subcutaneous adipocyte, and cardiac injury...
November 11, 2016: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/27824693/aerobic-exercise-training-improves-orthostatic-tolerance-in-aging-humans
#17
Diqun Xu, Hong Wang, Shande Chen, Sarah Ross, Howe Liu, Albert Olivencia-Yurvati, Peter B Raven, Xiangrong Shi
PURPOSE: This study was designed to test the hypothesis that aerobic exercise training of the elderly will increase aerobic fitness without compromising orthostatic tolerance (OT). METHODS: Eight healthy sedentary volunteers (67.0±1.7 years old, 4 women) participated in 1-year of endurance exercise training (stationary bicycle and/or treadmill) program at the individuals' 65%-75% of peak heart rate (HRpeak). Peak O2 uptake (VO2peak) and HRpeak were determined by a maximal exercise stress test using a bicycle ergometer...
November 7, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27802329/loss-of-breathing-modulation-of-heart-rate-variability-in-patients-with-recent-and-long-standing-diabetes-mellitus-type-ii
#18
Ana Leonor Rivera, Bruno Estañol, Ruben Fossion, Juan C Toledo-Roy, José A Callejas-Rojas, José A Gien-López, Guillermo R Delgado-García, Alejandro Frank
Healthy subjects under rhythmic breathing have heart interbeat intervals with a respiratory band in the frequency domain that can be an index of vagal activity. Diabetes Mellitus Type II (DM) affects the autonomic nervous system of patients, thus it can be expected changes on the vagal activity. Here, the influence of DM on the breathing modulation of the heart rate is evaluated by analyzing in the frequency domain heart interbeat interval (IBI) records obtained from 30 recently diagnosed, 15 long standing DM patients, and 30 control subjects during standardized clinical tests of controlled breathing at 0...
2016: PloS One
https://www.readbyqxmd.com/read/27773408/assessment-of-left-ventricular-ejection-force-and-sympathetic-skin-response-in-normotensive-and-hypertensive-subjects-a-double-blind-observational-comparative-case-control-study
#19
Tarun Saxena, Sanjay Patidar, Manjari Saxena
BACKGROUND: Pathophysiology of essential hypertension remains obscure. Correlation among ventricular ejection force, sympathetic activity, and hypertension is less clearly narrated in hypertensive subjects. AIMS AND OBJECTIVES: To assess correlation among ventricular ejection force, sympathetic activity, and hypertension in hypertensive subjects, and to be compared with normotensive subjects. METHODS: This is a case-control study to assess left ventricular ejection force (LVEF) and sympathetic skin response, in normotensive (group 1; control), and hypertensive subjects (group 2; cases)...
September 2016: Indian Heart Journal
https://www.readbyqxmd.com/read/27754003/js-ish-isn-2-role-of-the-kidney-in-resistant-hypertension-why-so-resistant-to-bp-control-in-ckd-patients
#20
George Bakris
Resistant hypertension is defined as a blood pressure above 140/90 mmHg despite adherence to a combination of at least three optimally dosed antihypertensive medications, one of which is a diuretic. Chronic kidney disease (CKD) is one of the more common patient comorbidities associated with resistant hypertension. Recommended low-salt diet and triple antihypertensive drug regimens that include a diuretic, should be complemented by the sequential addition of other antihypertensive drugs. CKD is associated with premature vascular ageing, characterized by accelerated arteriosclerosis or atherosclerosis and endothelial dysfunction...
September 2016: Journal of Hypertension
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