keyword
MENU ▼
Read by QxMD icon Read
search

Control heart rate

keyword
https://www.readbyqxmd.com/read/29053805/longitudinal-measures-of-deformation-are-associated-with-a-composite-measure-of-contractility-derived-from-pressure-volume-loop-analysis-in-children
#1
Shahryar M Chowdhury, Ryan J Butts, Carolyn L Taylor, Varsha M Bandisode, Karen S Chessa, Anthony M Hlavacek, Arni Nutting, Girish S Shirali, G Hamilton Baker
Aims: The relationship between echocardiographic measures of left ventricular (LV) systolic function and reference-standard measures have not been assessed in children. The objective of this study was to assess the validity of echocardiographic indices of LV systolic function via direct comparison to a novel composite measure of contractility derived from pressure-volume loop (PVL) analysis. Methods and results: Children with normal loading conditions undergoing routine left heart catheterization were prospectively enrolled...
June 29, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29053723/heart-rate-variability-and-baroreceptor-reflex-sensitivity-in-early-versus-late-onset-preeclampsia
#2
Thomas Michael Weber, Helmut Karl Lackner, Andreas Roessler, Ilona Papousek, Vassiliki Kolovetsiou-Kreiner, Miha Lucovnik, Karin Schmid-Zalaudek, Uwe Lang, Manfred Georg Moertl
OBJECTIVE: To determine whether there are differences in autonomic nervous system function in early- versus late-onset preeclampsia. METHODS: Matched case-control study. Cases were defined as singleton pregnancies with preeclampsia at < 34+0 weeks of gestation (early-onset preeclampsia) and ≥ 34+0 weeks of gestation (late-onset preeclampsia). For each case in each of the preeclampsia subgroups, three "control"uncomplicated singleton pregnancies were matched by maternal age, height, and week of gestation...
2017: PloS One
https://www.readbyqxmd.com/read/29053066/different-times-of-day-do-not-change-heart-rate-variability-recovery-after-light-exercise-in-sedentary-subjects-24%C3%A2-hours-holter-monitoring
#3
Eliza Prodel, Tiago Peçanha, Lilian Pinto Da Silva, Rogério Baumgratz De Paula, Daniel Godoy Martinez, Jorge Roberto Perrout De Lima, Mateus Camaroti Laterza
Incidence of cardiovascular events follows a circadian rhythm with peak occurrence during morning. Disturbance of autonomic control caused by exercise had raised the question of the safety in morning exercise and its recovery. Furthermore, we sought to investigate whether light aerobic exercise performed at night would increase HR and decrease HRV during sleep. Therefore, the aim of this study was to test the hypothesis that morning exercise would delay HR and HRV recovery after light aerobic exercise, additionally, we tested the impact of late night light aerobic exercise on HR and HRV during sleep in sedentary subjects...
October 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29053016/sudden-death-neurogenic-causes-prediction-and-prevention
#4
Nina Japundžić-Žigon, Olivera Šarenac, Maja Lozić, Marko Vasić, Tatjana Tasić, Dragana Bajić, Vladimir Kanjuh, David Murphy
Sudden death is a major health problem all over the world. The most common causes of sudden death are cardiac but there are also other causes such as neurological conditions (stroke, epileptic attacks and brain trauma), drugs, catecholamine toxicity, etc. A common feature of all these diverse pathologies underlying sudden death is the imbalance of the autonomic nervous system control of the cardiovascular system. This paper reviews different pathologies underlying sudden death with emphasis on the autonomic nervous system contribution, possibilities of early diagnosis and prognosis of sudden death using various clinical markers including autonomic markers (heart rate variability and baroreflex sensitivity), present possibilities of management and promising prevention by electrical neuromodulation...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29052467/the-effect-of-level-of-injury-and-physical-activity-on-heart-rate-variability-following-spinal-cord-injury
#5
Athanasios Kyriakides, Dimitrios Poulikakos, Angeliki Galata, Dimitrios Konstantinou, Elias Panagiotopoulos, Elisabeth Chroni
OBJECTIVE/BACKGROUND: To assess frequency domain heart rate variability (HRV) parameters at rest and in response to postural autonomic provocations in individuals with spinal cord injury (SCI) and investigate the autonomic influences on the heart of different physical activities. DESIGN: Cross-sectional study. METHODS: Ten subjects with complete cervical SCI and fourteen subjects with complete low thoracic SCI were prospectively recruited from the community and further divided in sedentary and physically active groups, the latter defined as regular weekly 4 hour physical activity for the preceding 3 months...
October 20, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29052280/reappraisal-of-systemic-venous-chemoreceptors-might-they-explain-the-matching-of-breathing-to-metabolic-rate-in-humans
#6
M J Parkes
What is the topic of this review? One of the major unanswered questions in physiology is that of how breathing matches metabolic rate. Venous chemoreceptors seem to have been dismissed since the 1960s. What advances does it highlight? New evidence shows that their apparent dismissal needs reappraisal. The paper on which this depends has more than one interpretation, and another paper obtained the opposite result. Previous search ignored all locations between skeletal muscle and the right heart. Oxygen sensors other than the arterial chemoreceptors do exist...
October 19, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29052102/changes-in-cerebellar-functional-connectivity-and-autonomic-regulation-in-cancer-patients-treated-with-the-neuro-emotional-technique-for-traumatic-stress-symptoms
#7
Daniel A Monti, Anna Tobia, Marie Stoner, Nancy Wintering, Michael Matthews, Chris J Conklin, Feroze B Mohamed, Inna Chervoneva, Andrew B Newberg
PURPOSE: A growing number of research studies have implicated the cerebellum in emotional processing and regulation, especially with regard to negative emotional memories. However, there currently are no studies showing functional changes in the cerebellum as a result of treatment for traumatic stress symptoms. The Neuro Emotional Technique (NET) is an intervention designed to help improve symptoms related to traumatic stress using an integrative approach that combines emotional, cognitive, and motor processing, with a particular focus on autonomic nervous system regulation...
October 19, 2017: Journal of Cancer Survivorship: Research and Practice
https://www.readbyqxmd.com/read/29051335/coronary-capillary-blood-flow-in-a-rat-model-of-congestive-heart-failure
#8
Heather J Kagan, Varujan D Belekdanian, Jiqiu Chen, Peter Backeris, Nadjib Hammoudi, Irene C Turnbull, Kevin D Costa, Roger J Hajjar
The aim of this study is to explore the role of abnormal coronary microvasculature morphology and hemodynamics in the development of congestive heart failure (CHF). METHODS: CHF was induced in rats by aortic banding, followed by ischemia/reperfusion and later aortic debanding. Polymerized casts of coronary vasculature were imaged under a Scanning Electron Microscope (SEM). Matrix Laboratory (MATLAB) software was used to calculate Capillary Structure Index (CSI), a measure of structural alignment also called Mean Vector Length (MVL), for 93 SEM images of coronary capillaries (CSI→ 1 perfect linearity, CSI→ 0 circular disarray)...
October 19, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29051306/peripheral-chemosensitivity-is-not-blunted-during-2%C3%A2-h-of-thermoneutral-head-out-water-immersion-in-healthy-men-and-women
#9
James R Sackett, Zachary J Schlader, Suman Sarker, Christopher L Chapman, Blair D Johnson
Carbon dioxide (CO2) retention occurs during water immersion, but it is not known if peripheral chemosensitivity is altered during water immersion, which could contribute to CO2 retention. We tested the hypothesis that peripheral chemosensitivity to hypercapnia and hypoxia is blunted during 2 h of thermoneutral head out water immersion (HOWI) in healthy young adults. Peripheral chemosensitivity was assessed by the ventilatory, heart rate, and blood pressure responses to hypercapnia and hypoxia at baseline, 10, 60, 120 min, and post HOWI and a time-control visit (control)...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29050719/how-is-pulmonary-function-and-exercise-tolerance-affected-in-patients-with-ais-who-have-undergone-spinal-fusion
#10
Kelly A Jeans, John F Lovejoy, Lori A Karol, Anna M McClung
STUDY DESIGN: Prospectively enrolled AIS patients who underwent spinal fusion, with 2 year follow-up. OBJECTIVES: To evaluate the cardiovascular fitness and activity level in patients with AIS pre- and post-spinal fusion and to determine if initial curve magnitude or pulmonary function is predictive of exercise capacity. SUMMARY OF BACKGROUND DATA: Researchers have tried to link pulmonary function testing (PFT) to exercise capacity; the results are mixed...
November 2017: Spine Deformity
https://www.readbyqxmd.com/read/29050439/pathogenicity-and-immunosuppressive-potential-of-fowl-adenovirus-in-specific-pathogen-free-chickens
#11
Yujuan Niu, Qinqin Sun, Guihua Zhang, Wei Sun, Xingpo Liu, Yihong Xiao, Yingli Shang, Sidang Liu
To elucidate the effect of fowl adenovirus (FAdV)-C in specific-pathogen-free (SPF) chickens, we investigated the pathogenicity, body weights, enzymatic systems, and immune organs of chickens in response to Newcastle disease virus (NDV) and avian influenza virus subtype H9 (AIV-H9) vaccination. Chickens were divided randomly into four groups, which included injection groups (FAdV-C, vaccination, and FAdV-C plus vaccination) and a negative control group. The results indicated that FAdV-C was highly pathogenic in SPF chickens and led to a 40% mortality rate and growth retardation, compared with the control birds...
September 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/29049707/influence-of-staged-repair-and-primary-repair-on-outcomes-in-patients-with-complete-atrioventricular-septal-defect-and-tetralogy-of-fallot-a-systematic-review-and-meta-analysis
#12
Evgeniy Lenko, Yuriy Kulyabin, Alexey Zubritskiy, Yuriy Gorbatykh, Yuriy Naberukhin, Nataliya Nichay, Alexander Bogachev-Prokophiev, Alexander Karaskov
OBJECTIVES: Complete atrioventricular septal defect with tetralogy of Fallot is a rare congenital heart disease. The combination of these lesions occurs in about 1% of all patients with atrioventricular canal defects and in 5-6% of patients with tetralogy of Fallot. To assess the influence of surgical strategy on the survival and reintervention rate for the left atrioventricular valve and right ventricular outflow tract. METHODS: We analyzed all related studies since 1986...
August 25, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049251/esmolol-pretreatment-attenuates-heart-rate-increase-and-parasympathetic-inhibition-during-rapid-increases-in-desflurane-concentration-a-preliminary-randomized-study
#13
Ming-Chang Kao, I-Shiang Tzeng, Hsiao-Lung Chan
BACKGROUND: Rapid increases in desflurane concentration can transiently increase the heart rate (HR). Esmolol possesses a high β1-adrenoceptor selectivity and a short duration of action. This preliminary study aimed at investigating the effects of esmolol on the HR and autonomic modulation during a desflurane-induced HR increase. METHODS: American Society of Anesthesiologists physical status I female subjects, aged 20 to 50 years, who were undergoing minor breast surgery were randomly assigned to 2 groups...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29049022/cardiovascular-adaptation-to-hypoxia-and-the-role-of-peripheral-resistance
#14
Andrew S Cowburn, David Macias, Charlotte Summers, Edwin R Chilvers, Randall S Johnson
Systemic vascular pressure in vertebrates is regulated by a range of factors: one key element of control is peripheral resistance in tissue capillary beds. Many aspects of the relationship between central control of vascular flow and peripheral resistance are unclear. An important example of this is the relationship between hypoxic response in individual tissues, and the effect that response has on systemic cardiovascular adaptation to oxygen deprivation. We show here how hypoxic response via the HIF transcription factors in one large vascular bed, that underlying the skin, influences cardiovascular response to hypoxia in mice...
October 19, 2017: ELife
https://www.readbyqxmd.com/read/29047215/acute-cardiovascular-effects-of-bitter-orange-extract-p-synephrine-consumed-alone-and-in-combination-with-caffeine-in-human-subjects-a-placebo-controlled-double-blind-study
#15
Nicholas A Ratamess, Jill A Bush, Sidney J Stohs, Nicole L Ellis, Ira T Vought, Elizabeth A O'Grady, Jeremy D Kuper, Saif B Hasan, Jie Kang, Avery D Faigenbaum
The purpose was to examine cardiovascular responses to supplementation with p-synephrine alone and in combination with caffeine during quiet sitting. Sixteen subjects were given (in double-blind manner) either 103 mg of p-synephrine (S), 233 mg of caffeine +104 mg of p-synephrine (LC + S), 240 mg of caffeine (LC), 337 mg of caffeine +46 mg of p-synephrine (HC + S), 325 mg of caffeine (HC), or a placebo. The subjects sat quietly for 3 hr while heart rate (HR) and blood pressure were measured. Only HC + S and HC significantly increased mean systolic blood pressure (SBP) during the second hour and tended to increase mean SBP during the third hour...
October 19, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29046775/effect-of-preoperative-incentive-spirometry-on-fentanyl-induced-cough-a-prospective-randomized-controlled-study
#16
Vipin Kumar Goyal, Suresh Kumar Bhargava, Birbal Baj
BACKGROUND: Fentanyl-induced cough (FIC) has a reported incidence of 13-65% on induction of anesthesia. Incentive spirometry (IS) creates forceful inspiration, while stretching pulmonary receptors. We postulated that spirometry just before the fentanyl (F) bolus would decrease the incidence and severity of FIC. METHODS: This study enrolled 200 patients aged 18-60 years and with American Society of Anesthesiologists status I or II. The patients were allocated to two groups of 100 patients each depending on whether they received preoperative incentive spirometry before fentanyl administration...
October 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/29046768/smartphones-and-e-tablets-in-perioperative-medicine
#17
REVIEW
Frederic Michard
Smartphones and electronic tablets (e-tablets) have become ubiquitous devices. Their ease of use, smartness, accessibility, mobility and connectivity create unique opportunities to improve quality of surgical care from prehabilitation to rehabilitation. Before surgery, digital applications (Apps), serious games and text messaging may help for a better control of risk factors (hypertension, overweight), for smoking cessation, and for optimizing adherence to preoperative recommendations (e.g., regarding anticoagulation or antihypertensive treatments)...
October 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/29046318/central-serotonin-and-the-control-of-arterial-blood-pressure-and-heart-rate-in-infant-rats-influence-of-sleep-state-and-sex
#18
Jennifer L Magnusson, Kevin James Cummings
Sudden Infant Death Syndrome (SIDS) is associated with serotonin (5-HT) neuron abnormalities. There is evidence of autonomic dysfunction during sleep in infants eventually succumbing to SIDS, as well as cardiovascular collapse prior to death. Neonatal rodents deficient in central 5-HT display hypotension and bradycardia. We hypothesized that central 5-HT reduces cardiac vagal tone and increases sympathetic vascular tone and, given the firing pattern of 5-HT neurons, that these effects are greater in quiet sleep (QS) than in active sleep (AS)...
October 18, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29045568/loss-of-protein-kinase-novel-1-pkn1-is-associated-with-mild-systolic-and-diastolic-contractile-dysfunction-increased-phospholamban-thr17-phosphorylation-and-exacerbated-ischaemia-reperfusion-injury
#19
Asvi A Francois, Kofo Obasanjo-Blackshire, James E Clark, Andrii Boguslavskyi, Mark R Holt, Peter Parker, Michael S Marber, Richard J Heads
Aims: PKN1 is a stress-responsive protein kinase acting downstream of small GTP-binding proteins of the Rho/Rac family. The aim was to determine its role in endogenous cardioprotection. Methods and Results: Hearts from PKN1 knockout (KO) or wild type (WT) littermate control mice were perfused in Langendorff mode and subjected to global ischemia and reperfusion (I/R). Myocardial infarct size was doubled in PKN1 KO hearts compared to WT hearts. PKN1 was basally phosphorylated on the activation loop Thr778 PDK1 target site which was unchanged during I/R...
October 16, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29045255/listening-to-relaxing-music-improves-physiological-responses-in-premature-infants-a-randomized-controlled-trial
#20
Rafael A Caparros-Gonzalez, Alejandro de la Torre-Luque, Carolina Diaz-Piedra, Francisco J Vico, Gualberto Buela-Casal
BACKGROUND: Premature infants are exposed to high levels of noise in the neonatal intensive care unit (NICU). PURPOSE: This study evaluated the effect of a relaxing music therapy intervention composed by artificial intelligence on respiratory rate, systolic and diastolic blood pressure, and heart rate. METHODS: A double-blind, randomized, controlled trial was conducted in the NICUs of 2 general public hospitals in Andalusia, Spain. Participants were 17 healthy premature infants, randomly allocated to the intervention group or the control group (silence) at a 1:1 ratio...
October 17, 2017: Advances in Neonatal Care: Official Journal of the National Association of Neonatal Nurses
keyword
keyword
101337
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"