keyword
MENU ▼
Read by QxMD icon Read
search

cardiac conductivity

keyword
https://www.readbyqxmd.com/read/29351473/sympathetically-mediated-cardiac-responses-to-isolated-muscle-metaboreflex-activation-following-exercise-are-modulated-by-body-position-in-humans
#1
André L Teixeira, Mauricio Daher, Mayara Souza, Plinio Santos Ramos, James P Fisher, Lauro C Vianna
Isolated muscle metaboreflex activation with post-handgrip exercise ischemia (PEI) increases sympathetic nerve activity and partially maintains the exercise-induced increase in blood pressure, but a smaller heart rate (HR) response occurs. The cardiopulmonary baroreceptors, mechanically sensitive receptors that respond to changes in central blood volume and pressure, are strongly associated with changes in body position and upon activation elicit reflex sympathoinhibition. Here, we tested the hypothesis that postural changes modulate the sympathetically-mediated cardiac response to PEI in humans...
December 15, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29351467/from-ionic-to-cellular-variability-in-human-atrial-myocytes-an-integrative-computational-and-experimental-study
#2
Anna Muszkiewicz, Xing Liu, Alfonso Bueno-Orovio, Brodie A J Lawson, Kevin Burrage, Barbara Casadei, Blanca Rodriguez
Variability refers to differences in physiological function between individuals, which may translate into different disease susceptibility and treatment efficacy. Experiments in human cardiomyocytes face wide variability and restricted tissue access; under these conditions computational models are a useful complementary tool. We conducted a computational and experimental investigation in cardiomyocytes isolated from samples of the right atrial appendage of patients undergoing cardiac surgery to evaluate the impact of variability in action potentials (APs) and sub-cellular ionic densities on calcium transient dynamics...
December 22, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29350378/eq-5d-studies-in-cardiovascular-diseases-in-eight-central-and-eastern-european-countries-a-systematic-review-of-the-literature
#3
Paulina Batóg, Fanni Rencz, Márta Péntek, László Gulácsi, Krzysztof J Filipiak, Valentina Prevolnik Rupel, Judit Simon, Valentin Brodszky, Petra Baji, Jakub Závada, Guenka Petrova, Alexandru Rotar, Dominik Golicki
BACKGROUND: The measurement of health-related quality of life (HRQOL) by validated generic instruments, such as EQ-5D, becomes an increasingly important tool for the assessment of health care in a wide range of different diagnoses. AIM: To systematically review EQ-5D literature generated in cardiovascular diseases in eight selected Central and Eastern Europe (CEE) countries. METHODS: A structured literature search was conducted in MEDLINE, EMBASE, Web of Science, CINAHL, PsycINFO, the Cochrane Library and the EuroQol website up to November 2016...
January 19, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29349819/incidence-and-predictors-of-sudden-cardiac-death-after-heart-transplantation-a-systematic-review-and-meta-analysis
#4
Ana C Alba, Farid Foroutan, Nicholas Kwet Vong Ng Fat Hing, Chun-Po S Fan, Cedric Manlhiot, Heather J Ross
PORPUSE: Sudden cardiac death (SCD) is an important post-transplant problem being responsible for approximately 10% of deaths. We conducted a systematic review and meta-analysis to evaluate incidence and predictors of post-heart transplant SCD, and use of implantable cardiac defibrillator (ICD). METHODS: Citations were identified in electronic databases and references of included studies. Observational studies on adults reporting on incidence and predictors of post-transplant SCD and ICD use were selected...
January 19, 2018: Clinical Transplantation
https://www.readbyqxmd.com/read/29349633/effects-of-tetradecylthioacetic-acid-tta-treatment-on-lipid-metabolism-in-salmon-hearts-in-vitro-and-in-vivo-studies
#5
Regin Arge, Jens-Erik Dessen, Tone-Kari Østbye, Bente Ruyter, Magny S Thomassen, Kjell-Arne Rørvik
In intensive farming of Atlantic salmon, a large proportion of observed mortality is related to cardiovascular diseases and circulatory failure, indicating insufficient robustness and inadequate cardiac performance. This paper reports on the use of tetradecylthioacetic acid (TTA) where the main objective was to enhance utilisation of fatty acids (FA), considered the main energy source of the heart. In this study, three experiments were conducted: (I) an in vivo study where salmon post-smolt were administrated dietary TTA in sea, (II) an in vitro study where isolated salmon heart cells were pre-stimulated with increasing doses of TTA and (III) an in vivo experiment where salmon post-smolt were subjected to injections with increasing doses of TTA...
January 19, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29349559/a-mutant-hcn4-channel-in-a-family-with-bradycardia-left-bundle-branch-block-and-left-ventricular-noncompaction
#6
Ryosuke Yokoyama, Koshi Kinoshita, Yukiko Hata, Masayoshi Abe, Kenta Matsuoka, Keiichi Hirono, Masanobu Kano, Makoto Nakazawa, Fukiko Ichida, Naoki Nishida, Toshihide Tabata
We found that a female infant presenting with left bundle branch block and left ventricular noncompaction carries uninvestigated gene mutations HCN4(G811E), SCN5A(L1988R), DMD(S2384Y), and EMD(R203H). Here, we explored the possible pathogenicity of HCN4(G811E), which results in a G811E substitution in hyperpolarization-activated cyclic nucleotide-gated channel 4, the main subunit of the cardiac pacemaker channel. Voltage-clamp measurements in a heterologous expression system of HEK293T cells showed that HCN4(G811E) slightly reduced whole-cell HCN4 channel conductance, whereas it did not affect the gating kinetics, unitary conductance, or cAMP-dependent modulation of voltage-dependence...
January 18, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29348407/error-related-cardiac-response-as-information-for-visibility-judgements
#7
Marta Łukowska, Michał Sznajder, Michał Wierzchoń
Interoception provides information about the saliency of external or internal sensory events and thus may inform perceptual decision-making. Error in performance is an example of a motivationally significant internal event that evokes autonomic nervous system response resembling the orienting response: heart rate deceleration, increased skin conductance response, and pupil dilation. Here, we investigate whether error-related cardiac activity may serve as a source of information when making metacognitive judgments in an orientation discrimination backward masking task...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29348252/translational-research-in-cardiovascular-repair-a-call-for-a-paradigm-shift
#8
REVIEW
Steven A J Chamuleau, Mira van der Naald, Andreu M Climent, Adriaan O Kraaijeveld, Kim E Wever, Dirk J Duncker, Francisco Fernández-Avilés, Roberto Bolli
The international consortium TACTICS (Transnational Alliance for Regenerative Therapies in Cardiovascular Syndromes) has recently addressed key priorities in the field of cell-based therapy for cardiac repair, identifying the efficacy of translational research as one of the main challenges to ultimately improve the quality of life of patients with ischemic disease. Much of the controversy and confusion surrounding cardiac regenerative therapy stems from insufficient rigor in the conduct of preclinical studies, and there is an increasing recognition of a number of problems that undermine its quality that may contribute to translational failure...
January 19, 2018: Circulation Research
https://www.readbyqxmd.com/read/29346209/the-society-of-thoracic-surgeons-the-society-of-cardiovascular-anesthesiologists-and-the-american-society-of-extracorporeal-technology-clinical-practice-guidelines-anticoagulation-during-cardiopulmonary-bypass
#9
Linda Shore-Lesserson, Robert A Baker, Victor A Ferraris, Philip E Greilich, David Fitzgerald, Philip Roman, John W Hammon
Despite more than a half century of "safe" cardiopulmonary bypass (CPB), the evidence base surrounding the conduct of anticoagulation therapy for CPB has not been organized into a succinct guideline. For this and other reasons, there is enormous practice variability relating to the use and dosing of heparin, monitoring heparin anticoagulation, reversal of anticoagulation, and the use of alternative anticoagulants. To address this and other gaps, The Society of Thoracic Surgeons, the Society of Cardiovascular Anesthesiologists, and the American Society of Extracorporeal Technology developed an Evidence Based Workgroup...
February 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29345717/vasoconstrictive-responses-of-the-cephalic-vein-during-first-time-cardiac-implantable-electronic-device-placement
#10
Roman Steckiewicz, Elżbieta Barbara Świętoń, Magdalena Bogdańska, Przemysław Stolarz
BACKGROUND: During cardiac implantable electronic device (CIED) implantation procedures cardiac leads have been mostly introduced transvenously. The associated injury to the selected vessel and adjacent tissues may induce reflex vasoconstriction. PURPOSE: To assess the incidence of cephalic vein (CV) vasoconstriction during first-time CIED implantation. METHODS: Of the 146 evaluated first-time CIED implantation procedures conducted in our center in 2016, we selected those during which CV vasoconstriction was recorded...
January 18, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29345513/no-benefit-in-neurologic-outcomes-of-survivors-of-out-of-hospital-cardiac-arrest-with-mechanical-compression-device
#11
Ryan Newberry, Ted Redman, Elliot Ross, Rachel Ely, Clayton Saidler, Allyson Arana, David Wampler, David Miramontes
INTRODUCTION: Out-of-hospital cardiac arrest (OHCA) is a major cause of death and morbidity in the United States. Quality cardiopulmonary resuscitation (CPR) has proven to be a key factor in improving survival. The aim of our study was to investigate the outcomes of OHCA when mechanical CPR (LUCAS 2 Chest Compression System™) was utilized compared to conventional CPR. Although controlled trials have not demonstrated a survival benefit to the routine use of mechanical CPR devices, there continues to be an interest for their use in OHCA...
January 18, 2018: Prehospital Emergency Care
https://www.readbyqxmd.com/read/29344737/the-125th-anniversary-of-the-his-bundle-discovery
#12
REVIEW
Georg H von Knorre
In 1893, Wilhelm His Jr. was the first to describe the AV (atrioventricular) bundle of the vertebrate heart, which now bears his name. Moreover, prior to the turn of the century, W. His Jr. had proved the function of the AV bundle by transection experiments in animals, and had interpreted Adams Stokes disease as heart block due to pathological changes within the bundle. In this way, he was ahead of his time. While clinical interest was limited to the bundle as the location of an AV block in the first half of the 125 years, it has gained attractiveness since then as a target of diagnostic and therapeutic procedures...
January 17, 2018: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/29343223/the-impact-of-age-on-the-implementation-of-evidence-based-medications-in-patients-with-coronary-artery-disease-and-its-prognostic-significance-a-retrospective-cohort-study
#13
Tian-Li Xia, Fang-Yang Huang, Yi-Ming Li, Hua Chai, Bao-Tao Huang, Yuan-Wei-Xiang Ou, Qiao Li, Xiao-Bo Pu, Zhi-Liang Zuo, Yong Peng, Mao Chen, De-Jia Huang
BACKGROUND: Elderly patients with coronary artery disease (CAD) frequently complicated with more cardiovascular risk factors, but received fewer evidence-based medications (EBMs). This study explored the association of EBMs compliance in different age groups and the risk of long-term death. METHODS: A retrospective analysis was conducted from a single registered database. 2830 consecutive patients with CAD were enrolled and grouped into 3 categories by age. The primary end point was all-cause mortality and secondary endpoint is cardiovascular mortality...
January 17, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29343170/accuracy-of-ultrasonographic-measurements-of-inferior-vena-cava-to-determine-fluid-responsiveness-a-systematic-review-and-meta-analysis
#14
Daniele Orso, Irene Paoli, Tommaso Piani, Francesco L Cilenti, Lorenzo Cristiani, Nicola Guglielmo
OBJECTIVE: Fluid responsiveness is the ability to increase the cardiac output in response to a fluid challenge. Only about 50% of patients receiving fluid resuscitation for acute circulatory failure increase their stroke volume, but the other 50% may worsen their outcome. Therefore, predicting fluid responsiveness is needed. In this purpose, in recent years, the assessment of the inferior vena cava (IVC) through ultrasound (US) has become very popular. The aim of our work was to systematically review all the previously published studies assessing the accuracy of the diameter of IVC or its respiratory variations measured through US in predicting fluid responsiveness...
January 1, 2018: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29342363/differential-effects-of-inhibitory-g-protein-isoforms-on-g-protein-gated-inwardly-rectifying-k-currents-in-adult-murine-atria
#15
Muriel Nobles, David Montaigne, Sonia Sebastian, Lutz Birnbaumer, Andrew Tinker
G-protein gated inwardly rectifying K+ (GIRK) channels are the major inwardly rectifying K+ currents in cardiac atrial myocytes and an important determinant of atrial electrophysiology. Inhibitory G-protein alpha subunits can both mediate activation via acetylcholine but can also supress basal currents in the absence of agonist. We studied this phenomenon using whole cell patch clamping in murine atria from mice with global genetic deletion of Gαi2, combined deletion of Gαi1/Gαi3 and littermate controls...
January 17, 2018: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29341066/cerebral-near-infrared-spectroscopy-nirs-for-perioperative-monitoring-of-brain-oxygenation-in-children-and-adults
#16
REVIEW
Yun Yu, Kaiying Zhang, Ling Zhang, Huantao Zong, Lingzhong Meng, Ruquan Han
BACKGROUND: Various techniques have been employed for the early detection of perioperative cerebral ischaemia and hypoxia. Cerebral near-infrared spectroscopy (NIRS) is increasingly used in this clinical scenario to monitor brain oxygenation. However, it is unknown whether perioperative cerebral NIRS monitoring and the subsequent treatment strategies are of benefit to patients. OBJECTIVES: To assess the effects of perioperative cerebral NIRS monitoring and corresponding treatment strategies in adults and children, compared with blinded or no cerebral oxygenation monitoring, or cerebral oxygenation monitoring based on non-NIRS technologies, on the detection of cerebral oxygen desaturation events (CDEs), neurological outcomes, non-neurological outcomes and socioeconomic impact (including cost of hospitalization and length of hospital stay)...
January 17, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29340631/a-better-understanding-of-ambulance-personnel-s-attitude-towards-real-time-resuscitation-feedback
#17
Peter Brinkrolf, Roman Lukas, Ulf Harding, Sebastian Thies, Joachim Gerss, Hugo Van Aken, Hans Lemke, Udo Schniedermeier, Andreas Bohn
Objective: High-quality chest compressions during cardiopulmonary resuscitation (CPR) play a significant role in surviving cardiac arrest. Chest-compression quality can be measured and corrected by real-time CPR feedback devices, which are not yet commonly used. This article looks at the acceptance of such systems in comparison of equipped and unequipped personnel. Design: Two groups of emergency medical services' (EMS) personnel were interviewed using standardized questionnaires...
January 11, 2018: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/29340538/autonomic-nervous-system-monitoring-in-intensive-care-as-a-prognostic-tool-systematic-review
#18
Luis Bento, Rui Fonseca-Pinto, Pedro Póvoa
OBJECTIVE: To present a systematic review of the use of autonomic nervous system monitoring as a prognostic tool in intensive care units by assessing heart rate variability. METHODS: Literature review of studies published until July 2016 listed in PubMed/Medline and conducted in intensive care units, on autonomic nervous system monitoring, via analysis of heart rate variability as a prognostic tool (mortality study). The following English terms were entered in the search field: ("autonomic nervous system" OR "heart rate variability") AND ("intensive care" OR "critical care" OR "emergency care" OR "ICU") AND ("prognosis" OR "prognoses" OR "mortality")...
October 2017: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/29339351/high-target-vs-low-target-blood-pressure-management-during-cardiopulmonary-bypass-to-prevent-cerebral-injury-in-cardiac-surgery-patients-a-randomized-controlled-trial
#19
Anne G Vedel, Frederik Holmgaard, Lars S Rasmussen, Annika Langkilde, Olaf B Paulson, Theis Lange, Carsten Thomsen, Peter Skov Olsen, Hanne Berg Ravn, Jens C Nilsson
Background -Cerebral injury is an important complication following cardiac surgery with the use of cardiopulmonary bypass (CPB). The rate of overt stroke after cardiac surgery is 1-2%, whereas silent strokes, detected by diffusion-weighed magnetic resonance imaging (DWI), are found in up to 50% of patients. It is unclear if a higher versus a lower blood pressure during cardiopulmonary bypass reduces cerebral infarction in these patients. Methods -In a patient- and assessor-blinded randomized trial, we allocated patients to a higher (70-80 mmHg) or lower (40-50 mmHg) target for mean arterial pressure by the titration of norepinephrine during cardiopulmonary bypass...
January 16, 2018: Circulation
https://www.readbyqxmd.com/read/29338497/a-prospective-observational-study-comparing-cardiac-function-of-small-for-gestational-age-with-appropriate-for-gestational-age-babies-using-serial-echocardiographic-studies
#20
Manish Kumar, Santhanam Sridhar, Niranjan Thomas
BACKGROUND: Approximately 30% of babies born in India are low birth weight (LBW) and about 70% of LBW babies are small for gestational age (SGA). Though there are several trials that have evaluated cardiac function of intrauterine growth restricted (IUGR) babies in utero, there is limited data about postnatal cardiac function in SGA babies during early neonatal period. This study was conducted to evaluate the cardiac functions of SGA babies by serial echocardiographic measurements and compare this with appropriate for gestational age (AGA) babies during the early postnatal period...
January 16, 2018: Journal of Maternal-fetal & Neonatal Medicine
keyword
keyword
39941
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"