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Full Text Journal Articles about
Hyperventilation Syndrome

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Effects of respiratory rate on venous-to-arterial CO2 tension difference in septic shock patients undergoing volume mechanical ventilation.

Zhixiang Guo, Yapeng Wang, Chao Xie, Guofang Hua, Shenglin Ge, Yuedong Li,

BACKGROUND:To explore the effects of the respiratory rate (RR) on the venous-to-arterial CO2 tension difference (gapCO2) in septic shock patients undergoing volume mechanical ventilation. METHODS:Adult patients with septic shock underwent volume mechanical ventilation between October 2015 and October 2016. RR was started at 10 breaths/min, and 2 breaths/min were added ... Read more >>

Eur. J. Med. Res. (European journal of medical research)
[2020, 25(1):6]

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Hyperventilation Syndrome: Investigating the Relationship Between Nijmegen Questionnaire, Vestibular Function Tests, and Patient Symptoms.

Christopher Y K Williams, Robert W K Williams, Richard Knight, Syed Hashmi, Neil Donnelly, Manohar Bance,

OBJECTIVE:To explore the Nijmegen Questionnaire (NQ) and its relationship to vestibular function tests and symptoms in patients with dizziness; to compare patient characteristics between those with a positive Nijmegen score and patients clinically diagnosed with hyperventilation syndrome (HVS). STUDY DESIGN:Retrospective case series. SETTING:Tertiary neurotology referral center. PATIENTS:Patients seen at vestibular ... Read more >>

Otol. Neurotol. (Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology)
[2020, 41(3):e349-e356]

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Outcomes in Brugada Syndrome Patients With Implantable Cardioverter-Defibrillators: Insights From the SGLT2 Registry.

Sharen Lee, Ka Hou Christien Li, Jiandong Zhou, Keith Sai Kit Leung, Rachel Wing Chuen Lai, Guoliang Li, Tong Liu, Konstantinos P Letsas, Ngai Shing Mok, Qingpeng Zhang, Gary Tse,

Background and Objectives:Brugada syndrome (BrS) is a cardiac ion channelopathy with characteristic electrocardiographic patterns, predisposing affected individuals to sudden cardiac death (SCD). Implantable cardioverter-defibrillator (ICD) is used for primary or secondary prevention in BrS, but its use remains controversial amongst low-risk asymptomatic patients. The present study aims to examine indicators ... Read more >>

Front Physiol (Frontiers in Physiology)
[2020, 11:204]

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Timing of Circulatory and Neurological Events in Syncope.

J. Gert van Dijk, Ineke A. van Rossum, Roland D. Thijs,

Syncope usually lasts less than a minute, in which short time arterial blood pressure temporarily falls enough to decrease brain perfusion so much that loss of consciousness ensues. Blood pressure decreases quickest when the heart suddenly stops pumping, which happens in arrhythmia and in severe cardioinhibitory reflex syncope. Loss of ... Read more >>

Front Cardiovasc Med (Frontiers in Cardiovascular Medicine)
[2020, 7:]

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Personalized risk stratification through attribute matching for clinical decision making in clinical conditions with aspecific symptoms: The example of syncope.

Monica Solbiati, James V Quinn, Franca Dipaola, Piergiorgio Duca, Raffaello Furlan, Nicola Montano, Matthew J Reed, Robert S Sheldon, Benjamin C Sun, Andrea Ungar, Giovanni Casazza, Giorgio Costantino, ,

BACKGROUND:Risk stratification is challenging in conditions, such as chest pain, shortness of breath and syncope, which can be the manifestation of many possible underlying diseases. In these cases, decision tools are unlikely to accurately identify all the different adverse events related to the possible etiologies. Attribute matching is a prediction ... Read more >>

PLoS ONE (PloS one)
[2020, 15(3):e0228725]

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Syncope and hypermobile joints: Not rare, but rarely diagnosed.

Elnur Tahirovic,

Postural orthostatic tachycardia syndrome (POTS) is a chronic, debilitating condition characterized by heterogeneous symptoms, such as lightheadedness, palpitations, pre-syncope, syncope, and weakness or heaviness, especially of the legs. It is frequently associated with hypermobile joints or conditions such as chronic fatigue syndrome, chronic abdominal pain, migraine headache, and diabetes mellitus. ... Read more >>

Turk Kardiyol Dern Ars (Turk Kardiyoloji Dernegi arsivi : Turk Kardiyoloji Derneginin yayin organidir)
[2020, 48(2):177-179]

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QTc interval-dependent body posture in pediatrics.

Björn Reynisson, Gustaf Tanghöj, Estelle Naumburg,

BACKGROUND:Syncope is a common and often benign disorder presenting at the pediatric emergency department. Long-QT syndrome may be presented with syncope, ventricular arrhythmias or sudden death and is vital to exclude as an underlying cause in children presented with syncope. Few studies have assessed QTc in relation to body posture ... Read more >>

BMC Pediatr (BMC pediatrics)
[2020, 20(1):107]

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Late-onset multiple acyl-CoA dehydrogenase deficiency with cardiac syncope: A case report.

Xue-Qi Pan, Xue-Li Chang, Wei Zhang, Hua-Xing Meng, Jing Zhang, Jia-Ying Shi, Jun-Hong Guo,

BACKGROUND:Multiple acyl-CoA dehydrogenase deficiency (MADD) is an uncommon autosomal recessive disorder of mitochondrial fatty acid beta-oxidation. Syncope is a transient loss of consciousness due to acute global cerebral hypoperfusion. Late-onset MADD with syncope has not been reported previously. CASE SUMMARY:We report a 17-year-old girl with exercise intolerance and muscle weakness. ... Read more >>

World J Clin Cases (World journal of clinical cases)
[2020, 8(5):995-1001]

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Postural Tachycardia Syndrome and Neurally Mediated Syncope.

Jeremy K Cutsforth-Gregory,

PURPOSE OF REVIEW:This article reviews the diagnosis and management of the most common disorders of orthostatic intolerance: postural tachycardia syndrome (POTS) and neurally mediated syncope. RECENT FINDINGS:POTS is a heterogeneous syndrome caused by several pathophysiologic mechanisms that may coexist (limited autonomic neuropathy, hyperadrenergic state, hypovolemia, venous pooling, joint hypermobility, deconditioning). ... Read more >>

Continuum (Minneap Minn) (Continuum (Minneapolis, Minn.))
[2020, 26(1):93-115]

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Carotid Sinus Syndrome in a Patient with Head and Neck Cancer: A Case Report.

Manuel Toscano, Sérgio Cristina, Ana Rafaela Alves,

Syncope is a common complaint among patients presenting to the emergency department. Its differential diagnosis is broad and its management varies significantly depending on the underlying etiology. This is especially complex in patients with head and neck cancer since it may appear as an initial manifestation of the disease, as a side effect of surgery ... Read more >>

Cureus (Cureus)
[2020, 12(2):e7042]

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Bradycardia and syncope as sole manifestations of a cranial lesion: a case report.

Dmitri Pchejetski, Mojiba Kenbaz, Heba Alshaker, Kiruparajan Jesudason,

BACKGROUND:Bradycardia and syncope are known sequelae of brain lesions. However, in the absence of neurological signs and symptoms, bradycardia and syncope are often investigated purely from the cardiovascular perspective and central nervous system-related causes may be easily overlooked during differential diagnosis. CASE PRESENTATION:Here we report a case of a 69-year-old ... Read more >>

J Med Case Rep (Journal of medical case reports)
[2020, 14(1):24]

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Shallow Water Blackout

Ryan M. Bart, Henry Lau,

The term shallow water backout has been commonly used as a term for drowning, particularly when preceded by hyperventilation. Other terms used to describe this syndrome include: “underwater blackout,” “underwater blackout syndrome,” “sudden underwater blackout syndrome (SUBS),” “breath-holding blackout,” and “free-diver blackout.” Shallow water blackout means unconsciousness in water typically ... Read more >>

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Wellens' Syndrome Presenting as Epigastric Pain and Syncope: An Unusual Presentation.

Temitope Ajibawo, Alexander Andreev, Sonu Sahni,

Wellens' syndrome, also regarded as left anterior descending coronary T-wave syndrome, is an electrocardiography (EKG) pattern that indicates critical proximal left anterior descending artery (LAD) stenosis. It is characterized by deeply inverted T-waves or biphasic T-waves in the anterior precordial chest leads in a patient with unstable angina. Patients typically ... Read more >>

Cureus (Cureus)
[2020, 12(2):e6877]

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A case report of sinoatrial arrest caused by temporal lobe epilepsy in subclinical glioblastoma.

Jörg Reifart, Marlene Tschernatsch, Christian W Hamm, Johannes Sperzel, Andreas Hain,

BACKGROUND:Atrial fibrillation with symptomatic bradycardia, higher grade atrioventricular block, and sinus node disease are all common indications for permanent pacemaker implantation. The most frequent causes of sinus node disease treated with pacemaker implantation involve degenerative structural changes of the sinus node; less often, extrinsic causes (such as damage due to ... Read more >>

BMC Cardiovasc Disord (BMC cardiovascular disorders)
[2020, 20(1):30]

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Classical and Delayed Orthostatic Hypotension in Patients With Unexplained Syncope and Severe Orthostatic Intolerance.

Parisa Torabi, Fabrizio Ricci, Viktor Hamrefors, Richard Sutton, Artur Fedorowski,

Background: Orthostatic hypotension (OH) is a major sign of cardiovascular autonomic failure leading to orthostatic intolerance and syncope. Orthostatic hypotension is traditionally divided into classical OH (cOH) and delayed OH (dOH), but the differences between the two variants are not well-studied. We performed a systematic clinical and neuroendocrine characterization of ... Read more >>

Front Cardiovasc Med (Frontiers in cardiovascular medicine)
[2020, 7:21]

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Reduced 24-h Sodium Excretion Is Associated With a Disturbed Plasma Acylcarnitine Profile in Vasovagal Syncope Children: A Pilot Study.

Jinqing Song, Chunyan Tao, Guozhen Chen, Selena Chen, Wenrui Xu, Junbao Du, Yanling Yang, Yaqian Huang,

Objective: To investigate if the low sodium intake is associated with the plasma carnitine and acylcarnitine profile in children with vasovagal syncope (VVS). Materials and Methods: Twenty-six children suffering from VVS were recruited in the present study and divided into a group of low urinary sodium excretion or a group ... Read more >>

Front Pediatr (Frontiers in Pediatrics)
[2020, 8:98]

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What is the Real Clinical Significance of Carotid Sinus Hypersensitivity in Clinical Practice? A Dilemma Still Waiting for Answers.

Tan Chen Wu,

Arq. Bras. Cardiol. (Arquivos brasileiros de cardiologia)
[2020, 114(2):254-255]

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Usefulness of an Implantable Loop Recorder in Diagnosing Unexplained Syncope and Predictors for Pacemaker Implantation.

Sung Ho Lee, Tae Hoon Kim, Yong Seog Oh, Seil Oh, Jong Il Choi, Jin Bae Kim, Jong Chun Nah, Sung Il Im, Ki Woon Kang, Seongwook Han, June Soo Kim,

BACKGROUND:An implantable loop recorder (ILR) is an effective tool for diagnosing unexplained syncope (US). We examined the diagnostic utility of an ILR in detecting arrhythmic causes of US and determining which clinical factors are associated with pacemaker (PM) implantation. METHODS:This retrospective, multicenter, observational study was conducted from February 2006 to ... Read more >>

J. Korean Med. Sci. (Journal of Korean medical science)
[2020, 35:e11]

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Catheter Ablation is Effective for Recovery from Sinus Node Dysfunction in Patients with Atrial Fibrillation, But Close Monitoring is Still Needed.

Seung Jung Park,

Korean Circ J (Korean circulation journal)
[2020, 50(4):358-360]

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The efficacy of peer assessment in objective structured clinical examinations for formative feedback: a preliminary study.

Kyong-Jee Kim, Giwoon Kim,

PURPOSE:We sought to determine the impact of medical students' prior experience of assessing peers in the objective structured clinical examination (OSCE) on their clinical performance. METHODS:Forty-two year 4 medical students participated in an OSCE comprised of three 10-minute stations (syncope, hemoptysis, and back pain). Each student took part in two ... Read more >>

Korean J Med Educ (Korean journal of medical education)
[2020, 32(1):59-65]

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[A case of neuromyelitis optica spectrum disorder with persistent nausea and repeated syncope].

Yoshinori Endo, Kouji Hayashi, Masamichi Ikawa, Osamu Yamamura, Kiyotaka Ookura, Tadanori Hamano,

A 22-year-old woman was admitted to our hospital with persistent nausea and no apparent cause. There was no preceding infection. The patient lost consciousness for several seconds. Based on an electrocardiographic diagnosis of paroxysmal sinus arrest (PSA), a temporary pacemaker was implanted. She did not develop syncope, but vertigo, nystagmus, ... Read more >>

Rinsho Shinkeigaku (Rinsho shinkeigaku = Clinical neurology)
[2020, 60(2):142-145]

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Refractoriness to subcutaneous implantable cardioverter defibrillator after frequent therapies for ventricular fibrillation storms in a Brugada syndrome case.

Yasuhisa Nakao, Kazuyoshi Suenari, Kohei Yamashiro, Hiroshi Nakagawa, Nobuo Shiode,

BACKGROUND:The subcutaneous implantable cardioverter defibrillator (S-ICD) is an alternative to the transvenous implantable cardioverter defibrillator for the prevention of sudden cardiac death. Here, we report a rare case of refractoriness to an S-ICD after frequent therapies for ventricular fibrillation (VF) storms. CASE PRESENTATION:A 24-year-old man underwent a bout of syncope ... Read more >>

BMC Cardiovasc Disord (BMC Cardiovascular Disorders)
[2020, 20(1):134]

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When Sinus Tachycardia Becomes Too Much: Negative Effects of Excessive Upright Tachycardia on Cardiac Output in Vasovagal Syncope, Postural Tachycardia Syndrome, and Inappropriate Sinus Tachycardia.

Julian M Stewart, Marvin S Medow, Paul Visintainer, Richard Sutton,

BACKGROUND:Upright posture reduces venous return, stroke volume, and cardiac output (CO) while causing reflex sinus rate (heart rate [HR]) increase. Yet, in inappropriate sinus tachycardia (IST), postural tachycardia syndrome (POTS), and vasovagal syncope (VVS), symptomatic excessive HR occurs. We hypothesized that CO reaches maximum as function of HR in all. ... Read more >>

Circ Arrhythm Electrophysiol (Circulation. Arrhythmia and electrophysiology)
[2020, 13(2):e007744]

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Retrospective Diagnosis of Congenital Long QT Syndrome in a Patient With Febrile Syncope.

Kory S London, Jessica Zegre-Hemsey, Melanie Root, Alex Kleinmann, Jennifer L White,

J Emerg Nurs (Journal of emergency nursing)
[2020, 46(2):214-219]

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Uncommon presentation of a common disorder: Syncope with AVNRT in setting of a structural anomaly.

Paul Jae-Hyuk Lee, Paul Varosy, Amneet Sandhu,

Syncope in setting of AV nodal re-entrant tachycardia should prompt the clinician to perform further workup for comorbid conditions, including structural cardiac abnormalities. In complex cases, ICE may be helpful in delineating the anatomy to facilitate safe ablations. ... Read more >>

Clin Case Rep (Clinical Case Reports)
[2020, 8(3):477-480]

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