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Vasovagal syncope

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https://www.readbyqxmd.com/read/28217221/byung-gyu-kim-et-al-reduced-systemic-vascular-resistance-is-the-underlying-hemodynamic-mechanism-in-nitrate-stimulated-vasovagal-syncope-during-head-up-tilt-table-test
#1
Arttu Eräranta, Antti Tikkakoski, Ilkka H Pörsti
No abstract text is available yet for this article.
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28212873/temperament-and-character-personality-dimensions-in-nitrate-tilt-induced-vasovagal-syncope-patients
#2
Vincenzo Russo, Ahmed AlTurki, Anna Rago, Riccardo Proietti, Guillaume Chaussé, Alessio Maria Monteleone, Pasquale Scognamiglio, Palmiero Monteleone, Gerardo Nigro
INTRODUCTION: Vasovagal syncope (VVS) is a clinical syndrome characterized by transient loss of consciousness and postural tone that is due to a temporary and spontaneously self-terminating global cerebral hypoperfusion. It is known that personality modulates the individual's sensitivity to stressors, and emotional arousal and psychologic uncertainty are conditions contributing to vasodepressor syncope. Therefore it is postulated that personality characteristics of VVS patients could have a role in the pathophysiology of VVS...
February 14, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/28100453/mechanisms-of-vasovagal-syncope-in-the-young-reduced-systemic-vascular-resistance-versus-reduced-cardiac-output
#3
Julian M Stewart, Marvin S Medow, Richard Sutton, Paul Visintainer, David L Jardine, Wouter Wieling
BACKGROUND: Syncope is a sudden transient loss of consciousness and postural tone caused by cerebral hypoperfusion. The most common form is vasovagal syncope (VVS). Presyncopal progressive early hypotension in older VVS patients is caused by reduced cardiac output (CO); younger patients have reduced systemic vascular resistance (SVR). Using a priori criteria for reduced CO (↓CO) and SVR (↓SVR), we studied 48 recurrent young fainters comparing subgroups of VVS with VVS-↓CO, VVS-↓SVR, and both VVS-↓CO&↓SVR...
January 18, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28093516/tilt-induced-vasovagal-syncope-and-psychogenic-pseudosyncope-overlapping-clinical-entities
#4
(no author information available yet)
No abstract text is available yet for this article.
January 17, 2017: Neurology
https://www.readbyqxmd.com/read/28073658/copeptin-levels-in-patients-with-vasovagal-syncope
#5
Panayota Flevari, Dionyssios Leftheriotis, Christos Kroupis, George Antonakos, John Lekakis, Kleanthi Dima
BACKGROUND AND PURPOSE: Vasovagal syncope (VVS) is linked to more than one pathophysiologic mechanisms. Copeptin, an emerging cardiovascular marker, is a surrogate for arginine-vasopressin, which increases following VVS. We aimed to assess the dynamic pattern of copeptin levels in typical VVS, categorized by the degree of vasoconstriction during orthostasis, and healthy controls. METHODS: The following groups were studied: Group A (n=21), with adequate limb vasoconstriction during the first min...
March 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28072962/-relationship-between-blood-routine-test-parameters-and-syncopal-recurrence-of-vasovagal-syncope-in-children
#6
J Y Song, H X Li, X Y Li, Y L Wang, H F Jin, J B Du
Objective: To explore the relationship between venous blood routine test parameters and syncopal recurrence of children with vasovagal syncope (VVS). Method: Sixty-three children (male 32, female 31) diagnosed as VVS in Department of Pediatrics, Peking University First Hospital from November 2010 to October 2015 were included in a case observational study.Their mean age was (11.2±2.7) years and basic treatment such as predisposing causes avoiding, standing training, autonomic nervous function exercise and oral rehydration salts were advised to them...
January 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28055999/-role-of-the-sympathetic-nervous-system-in-vasovagal-syncope-and-rationale-for-beta-blockers-and-norepinephrine-transporter-inhibitors
#7
Manlio F Márquez, Jorge Rafael Gómez-Flores, Jesús A González-Hermosillo, Teresita de Jesús Ruíz-Siller, Manuel Cárdenas
Vasovagal or neurocardiogenic syncope is a common clinical situation and, as with other entities associated with orthostatic intolerance, the underlying condition is a dysfunction of the autonomic nervous system. This article reviews various aspects of vasovagal syncope, including its relationship with orthostatic intolerance and the role of the autonomic nervous system in it. A brief history of the problem is given, as well as a description of how the names and associated concepts have evolved. The response of the sympathetic system to orthostatic stress, the physiology of the baroreflex system and the neurohumoral changes that occur with standing are analyzed...
December 29, 2016: Medwave
https://www.readbyqxmd.com/read/28034919/management-of-vasovagal-syncope-where-are-we-today
#8
Seamas C Donnelly
No abstract text is available yet for this article.
December 2016: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/27932282/serum-cardiac-troponin-i-in-canine-syncope-and-seizures
#9
E Dutton, J Dukes-McEwan, P J Cripps
OBJECTIVE: To determine if serum cardiac troponin I (cTnI) concentration distinguishes between cardiogenic syncope and collapsing dogs presenting with either generalized epileptic seizures (both with and without cardiac disease) or vasovagal syncope. ANIMALS: Seventy-nine prospectively recruited dogs, grouped according to aetiology of collapse: generalized epileptic seizures (group E), cardiogenic syncope (group C), dogs with both epileptic seizures and cardiac disease (group B), vasovagal syncope (group V) or unclassified (group U)...
February 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/27903377/-a-case-of-vasovagal-syncope-treatedwith-pacemaker-with-rate-drop-response
#10
T Lin, X W Xu, X Wei
No abstract text is available yet for this article.
October 24, 2016: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/27883352/-long-term-prognosis-in-patients-with-vasovagal-syncope-after-pacemaker-implantation
#11
REVIEW
Daria Bałczewska, Krzysztof Kaczmarek, Paweł Ptaszyński, Jerzy K Wranicz, Iwona Cygankiewicz
Patients with syncope, without presence of a structural or primary electrical disease, have a very good prognosis. On the other hand, recurring syncope has a negative impact on quality of life and involves a real risk of physical injuries. Vasovagal syncope usually requires no medical therapy and the most commonly recommended instruction include avoidance of fainting triggers, exercise that mainly provoke leg muscles tension, increase salt consumption and drink indicated amount of fluids. In the case cardioinhibitory type of vasovagal syncope the pacemaker implantation can consider...
November 25, 2016: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/27865628/the-genesis-and-presentation-of-anxiety-in-disorders-of-autonomic-overexcitation
#12
Andrew P Owens, David A Low, Valeria Iodice, Hugo D Critchley, Christopher J Mathias
INTRODUCTION: We investigated the genesis and presentation of previously-reported anxiety in disorders of autonomic overexcitation in relation to interoception, body vigilance and trauma to test our hypothesis that patients with the postural tachycardia syndrome (PoTS), vasovagal syncope (VVS) and essential hyperhidrosis (EH) represent atypical anxiety phenotypes in whom affective symptoms are more related to apprehension and vigilance of physiological (interoceptive) feedback than neurotic or trauma-related factors...
October 19, 2016: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/27845151/data-fusion-for-paroxysmal-events-classification-from-eeg
#13
Evangelia Pippa, Evangelia I Zacharaki, Michael Koutroumanidis, Vasileios Megalooikonomou
BACKGROUND: Spatiotemporal analysis of electroencephalography is commonly used for classification of events since it allows capturing dependencies across channels. The significant increase of feature vector dimensionality however introduce noise and thus it does not allow the classification models to be trained using a limited number of samples usually available in clinical studies. NEW METHOD: Thus, we investigate the classification of epileptic and non-epileptic events based on temporal and spectral analysis through the application of three different fusion schemes for the combination of information across channels...
January 1, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/27760090/-technical-options-of-electrotherapy-in-patients-with-vasovagal-syncope
#14
EDITORIAL
Daria Bałczewska, Krzysztof Kaczmarek, Paweł Ptaszyński, Jerzy Krzysztof Wranicz, Iwona Cygankiewicz
Syncope is a symptom of the disease with diverse etiology and can be evidence of both benign and very serious life-threatening conditions. Vasovagal syncope(VVS), with prevalence about 35% of the general population, is most frequent causes of transient loss of consciousness (T-LOC). Most cases of vasovagal syncope requires conservative treatment. Although cardioinhibitory type of VVS characterized by a significant bradycardia or pause of the heart rate and can be treated with continuous electrotherapy. This article discuss cardiac pacing and technical solutions for the treatment of VVS...
October 19, 2016: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/27702852/antiadrenergic-autoimmunity-in-postural-tachycardia-syndrome
#15
Artur Fedorowski, Hongliang Li, Xichun Yu, Kristi A Koelsch, Valerie M Harris, Campbell Liles, Taylor A Murphy, Syed M S Quadri, Robert Hal Scofield, Richard Sutton, Olle Melander, David C Kem
AIMS: Postural tachycardia syndrome (POTS), a common and debilitating cardiovascular disorder, is characterized by an exaggerated heart rate increase during orthostasis and a wide spectrum of adrenergic-related symptoms. To determine the aetiology of POTS, we examined a possible pathophysiological role for autoantibodies against α1-adrenergic (α1AR) and β1/2-adrenergic receptors (β1/2AR). METHODS AND RESULTS: Immunoglobulin G (IgG) derived from 17 POTS patients, 7 with recurrent vasovagal syncope (VVS), and 11 normal controls was analysed for its ability to modulate activity and ligand responsiveness of α1AR and β1/2AR in transfected cells and to alter contractility of isolated rat cremaster arterioles in vitro...
October 4, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27702846/fluoxetine-vs-placebo-for-the-treatment-of-recurrent-vasovagal-syncope-with-anxiety-sensitivity
#16
Panayota Flevari, Dionyssios Leftheriotis, Evangelos Repasos, Dimitrios Katsaras, Andreas Katsimardos, John Lekakis
AIMS: The optimal medical therapy of patients with vasovagal syncope (VVS) remains controversial. Fluoxetine is effective against anxiety and panic disorders, while its use has shown promising results for VVS. Anxiety sensitivity is a personality trait observed in a considerable proportion of patients with VVS, associated with predisposition to anxiety and panic disorders. Our aim was to examine whether fluoxetine exerts beneficial effects regarding VVS prevention in the subset of patients with anxiety sensitivity...
January 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27688429/medical-emergencies-in-pediatric-dentistry
#17
REVIEW
Dubravka Negovetić Vranić, Josipa Jurković, Jesenka Jeličić, Antonija Balenović, Gordana Stipančić, Ivana Čuković-Bagić
Medical emergencies that are life threatening can occur in dental practice. Complications may arise because of an underlying disease or a reaction to medication. Reactions to medications may be allergic and toxic. The most common reactions are toxic reactions to local anesthetics, whereas allergies occur mainly as a consequence of the application of antibiotics, usually penicillin. In response to stress, vasovagal syncope typically occurs. Other causes may be related to an underlying disease-specific pathology (such as acute asthma attack, diabetic ketoacidosis, hypoglycemia, or seizures) or accidents (aspiration of a foreign body causing obstruction of the respiratory system)...
March 2016: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/27681167/time-and-frequency-domain-analysis-of-beat-to-beat-p-wave-duration-pr-interval-and-rr-interval-can-predict-asystole-as-form-of-syncope-during-head-up-tilt
#18
Gianfranco Piccirillo, Federica Moscucci, Claudia Fiorucci, Claudia Di Iorio, Fabiola Mastropietri, Damiano Magrì
To seek possible differences in short-period temporal RR interval, P-wave and PR interval dispersion and spectral coherence in patients with a head-up tilt test positive for vasovagal syncope with or without prolonged asystole, severe symptoms and at high risk of trauma. We retrospectively reviewed 5 min ECG and blood pressure recordings obtained at baseline, at rest and during head-up tilt in 40 patients diagnosed as having recurrent vasovagal syncope confirmed at a head-up tilt test. We analysed autoregressive spectral power for all the ECG-derived variables, focusing on temporal P-wave and PR interval dispersion indexes as well as their spectral coherence calculated on the same 5 min recordings at rest and during tilt...
November 2016: Physiological Measurement
https://www.readbyqxmd.com/read/27665856/how-does-the-estimated-phase-of-menstrual-cycle-or-menopause-influence-the-prevalence-of-vasovagal-syncope-induced-by-head-up-tilt
#19
Artur Pietrucha, Joanna Jędrzejczyk-Spaho, Ewa Konduracka, Irena Bzukała, Krzysztof Krawczyk, Olga Kruszelnicka-Kwiatkowska, Jadwiga Nessler
BACKGROUND: The purpose of this study was to evaluate the prevalence of syncope induced by head-up tilt test (HUTT) and the type of positive vasovagal response to the orthostatic stress in a relationship to the estimated phase of menstrual cycle (follicular phase, luteal phase) or menopause. METHODS: We observed a cohort of 500 women at age 13-89 years (median of age 37.5), referred to HUTT. Phase of the menstrual cycle was determined on the basis of the usual length of menstrual cycle and the day of the cycle at the time of the study...
September 26, 2016: Cardiology Journal
https://www.readbyqxmd.com/read/27651841/the-current-indication-for-pacemaker-in-patients-with-cardioinhibitory-vasovagal-syncope
#20
Rose Mary Ferreira Lisboa da Silva
The most frequent cause of syncope is vasovagal reflex. It is associated with worse quality of life, depression, fatigue and physical injury. Recurrence of vasovagal syncope is an aggravating, reaching the rate of 69%. Initial step and pharmacological treatment may not work, especially in patients with recurrent syncope without prodrome. These patients can present cardioinhibitory response with asystole. Studies were designed to analyses the effectiveness of pacemaker for prevention of syncope. In this review, nonrandomized clinical trials, open-label randomized, double-blind randomized, placebo-controlled, and studies based on tilt test or Implantable Loop Recorder findings will be discussed...
2016: Open Cardiovascular Medicine Journal
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