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J wave syndrome

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https://www.readbyqxmd.com/read/28343259/numerical-and-experimental-analysis-of-the-transitional-flow-across-a-real-stenosis
#1
R Agujetas, C Ferrera, A C Marcos, J P Alejo, J M Montanero
In this paper, we present a numerical study of the pulsatile transitional flow crossing a severe real stenosis located right in front of the bifurcation between the right subclavian and right common carotid arteries. The simulation allows one to determine relevant features of this subject-specific flow, such as the pressure waves in the right subclavian and right common carotid arteries. We explain the subclavian steal syndrome suffered by the patient in terms of the drastic pressure drop in the right subclavian artery...
March 25, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28325926/night-and-day-variations-of-sleep-in-patients-with-disorders-of-consciousness
#2
Malgorzata Wislowska, Renata Del Giudice, Julia Lechinger, Tomasz Wielek, Dominik P J Heib, Alain Pitiot, Gerald Pichler, Gabriele Michitsch, Johann Donis, Manuel Schabus
Brain injuries substantially change the entire landscape of oscillatory dynamics and render detection of typical sleep patterns difficult. Yet, sleep is characterized not only by specific EEG waveforms, but also by its circadian organization. In the present study we investigated whether brain dynamics of patients with disorders of consciousness systematically change between day and night. We recorded ~24 h EEG at the bedside of 18 patients diagnosed to be vigilant but unaware (Unresponsive Wakefulness Syndrome) and 17 patients revealing signs of fluctuating consciousness (Minimally Conscious State)...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28318322/cannon-a-waves-due-to-pacemaker-syndrome
#3
Jackson J Liang, John W Hirshfeld
No abstract text is available yet for this article.
March 20, 2017: Acute Cardiac Care
https://www.readbyqxmd.com/read/28317438/instantaneous-wave-free-ratio-versus-fractional-flow-reserve-to-guide-pci
#4
Matthias Götberg, Evald H Christiansen, Ingibjörg J Gudmundsdottir, Lennart Sandhall, Mikael Danielewicz, Lars Jakobsen, Sven-Erik Olsson, Patrik Öhagen, Hans Olsson, Elmir Omerovic, Fredrik Calais, Pontus Lindroos, Michael Maeng, Tim Tödt, Dimitrios Venetsanos, Stefan K James, Amra Kåregren, Margareta Nilsson, Jörg Carlsson, Dario Hauer, Jens Jensen, Ann-Charlotte Karlsson, Georgios Panayi, David Erlinge, Ole Fröbert
Background The instantaneous wave-free ratio (iFR) is an index used to assess the severity of coronary-artery stenosis. The index has been tested against fractional flow reserve (FFR) in small trials, and the two measures have been found to have similar diagnostic accuracy. However, studies of clinical outcomes associated with the use of iFR are lacking. We aimed to evaluate whether iFR is noninferior to FFR with respect to the rate of subsequent major adverse cardiac events. Methods We conducted a multicenter, randomized, controlled, open-label clinical trial using the Swedish Coronary Angiography and Angioplasty Registry for enrollment...
March 18, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28316113/the-utility-of-exercise-testing-in-risk-stratification-of-asymptomatic-patients-with-type-1-brugada-pattern
#5
Muthiah Subramanian, Mukund A Prabhu, M S Harikrishnan, Saritha S Shekhar, Praveen G Pai, K U Natarajan
INTRODUCTION: Risk stratification of asymptomatic patients with a Brugada type 1 ECG pattern remains an unresolved clinical conundrum. In contrast to provocative pharmacological testing in Brugada syndrome, there is limited data on the role of exercise stress testing as a risk stratification modality. The objective of this study was to evaluate the utility of exercise testing in asymptomatic patients with type 1 Brugada pattern to prognosticate major arrhythmic events(MAE) during follow-up...
March 18, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28285655/correlation-of-metabolic-syndrome-severity-with-cardiovascular-health-markers-in-adolescents
#6
Arthur M Lee, Matthew J Gurka, Mark D DeBoer
BACKGROUND AND OBJECTIVES: The presence of metabolic syndrome (MetS) in childhood is a significant risk factor for later cardiovascular disease (CVD). Recent data showed temporal decreases in a sex- and race/ethnicity-specific MetS severity z-score among U.S. adolescents. Our goal was to characterize the relationship of this MetS z-score with other CVD risk indicators and assess their temporal trends and lifestyle influences. METHODS: We analyzed 4837 participants aged 12-20years from the National Health and Nutrition Examination Survey by 2-year waves from 1999 to 2012...
April 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28279743/vectrocardiography-identifies-patients-with-electrocardiographically-concealed-long-qt-syndrome-eclqts
#7
Daniel Cortez, J Martijn Bos, Michael J Ackerman
BACKGROUND: Long QT syndrome (LQTS) and genotypic subtypes are associated with distinctive T wave patterns, arrhythmogenic triggers, and corrected QT interval (QTc) risk associations. Twenty percent of patients with LQTS have normal QTc values, electrographically concealed LQTS (ecLQTS). Vectorcardiography (VCG) has value for sudden cardiac death risk assessment. OBJECTIVE: To determine the utility of VCG to identify patients with ecLQTS. METHODS: We performed a retrospective review on patients with ecLQTS, defined as resting QTc values < 440 ms...
March 6, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28251030/giant-j-osborn-wave-due-to-bonsai-abuse-comments-on-clinical-practice
#8
Murat Yalçın, Mustafa Aparcı, Murat Eroğlu, Zafer Işılak, Namık Özmen
BACKGROUND: Osborn wave, typically associated with hypothermia, is currently referred to as one of the J wave syndromes due to its clinical potential to develop lethal cardiac arrhythmia; it may rarely be observed in a non-hypothermic setting such as cannabis abuse. CASE REPORT: In this paper, we presented two young cases who presented to the emergency services with unconsciousness, drowsiness, and hypoxia, and also J wave on electrocardiography (ECG) due to Bonsai abuse...
January 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28222756/proximal-aortic-stiffening-in-turner-patients-may-be-present-before-dilation-can-be-detected-a-segmental-functional-mri-study
#9
Daniel G H Devos, Katya De Groote, Danilo Babin, Laurent Demulier, Yves Taeymans, Jos J Westenberg, Luc Van Bortel, Patrick Segers, Eric Achten, Jean De Schepper, Ernst Rietzschel
BACKGROUND: To study segmental structural and functional aortic properties in Turner syndrome (TS) patients. Aortic abnormalities contribute to increased morbidity and mortality of women with Turner syndrome. Cardiovascular magnetic resonance (CMR) allows segmental study of aortic elastic properties. METHOD: We performed Pulse Wave Velocity (PWV) and distensibility measurements using CMR of the thoracic and abdominal aorta in 55 TS-patients, aged 13-59y, and in a control population (n = 38;12-58y)...
February 13, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28213374/diurnal-differences-in-risk-of-cardiac-arrhythmias-during-spontaneous-hypoglycemia-in-young-people-with-type-1-diabetes
#10
Peter Novodvorsky, Alan Bernjak, Elaine Chow, Ahmed Iqbal, Lianne Sellors, Scott Williams, Robert A Fawdry, Bhavin Parekh, Richard M Jacques, Jefferson L B Marques, Paul J Sheridan, Simon R Heller
OBJECTIVE: Hypoglycemia may exert proarrhythmogenic effects on the heart via sympathoadrenal stimulation and hypokalemia. Hypoglycemia-induced cardiac dysrhythmias are linked to the "dead-in-bed syndrome," a rare, but devastating, condition. We examined the effect of nocturnal and daytime clinical hypoglycemia on electrocardiogram (ECG) in young people with type 1 diabetes. RESEARCH DESIGN AND METHODS: Thirty-seven individuals with type 1 diabetes underwent 96 h of simultaneous ambulatory ECG and blinded continuous interstitial glucose monitoring (CGM) while symptomatic hypoglycemia was recorded...
February 17, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28184198/local-left-ventricular-epicardial-j-waves-and-late-potentials-in-brugada-syndrome-patients-with-inferolateral-early-repolarization-pattern
#11
Satoshi Nagase, Masamichi Tanaka, Hiroshi Morita, Koji Nakagawa, Tadashi Wada, Masato Murakami, Nobuhiro Nishii, Kazufumi Nakamura, Hiroshi Ito, Tohru Ohe, Kengo F Kusano
Background: Brugada syndrome (BrS) is characterized by J-point or ST-segment elevation on electrocardiograms (ECGs) and increased risk of ventricular fibrillation (VF). In BrS, epicardial depolarization abnormality with delayed potential on the right ventricular outflow tract is reportedly the predominant mechanism underlying VF. Yet VF occurrence is also associated with early repolarization (ER) pattern in the inferolateral ECG leads, which may represent the inferior and/or left lateral ventricular myocardium...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28124260/thyroid-hormone-intoxication-as-a-not-yet-described-cause-of-j-wave-syndrome-in-a-pediatric-patient
#12
J Carlos Flores-González, Branislava Grujic, Alfonso M Lechuga-Sancho
No abstract text is available yet for this article.
January 25, 2017: Endocrine
https://www.readbyqxmd.com/read/28074997/-classification-of-idiopathic-generalised-epilepsies-in-patients-over-16-years-of-age
#13
J Sala-Padro, M Toledo, E Santamarina, M Gonzalez-Cuevas, M Raspall-Chaure, M Sueiras-Gil, M Quintana, J Salas-Puig
INTRODUCTION: Idiopathic generalised epilepsies (IGE) are a set of electroclinical syndromes with different phenotypes. Our aim is to analyse those phenotypes in patients over 16 years of age. PATIENTS AND METHODS: We conducted a retrospective analysis of a series of patients with IGE. They were classified as childhood absence epilepsy (CAE), juvenile absence epilepsy (JAE), juvenile myoclonic epilepsy (JME), epilepsy with tonic-clonic seizures only (TCSE), epilepsy with eyelid myoclonias and absences (EMA) and pure photogenic epilepsy (PE)...
January 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28025132/differences-in-characteristics-between-j-wave-syndrome-patients
#14
EDITORIAL
Heikki V Huikuri
No abstract text is available yet for this article.
December 23, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28000227/variants-of-brugada-syndrome-and-early-repolarization-syndrome-an-expanded-concept-of-j-wave-syndrome
#15
Sung-Hwan Kim, Gi-Byoung Nam, Sung-Cheol Yun, Hyung Oh Choi, Kee-Joon Choi, Boyoung Joung, Hui-Nam Pak, Moon-Hyoung Lee, Sung Soon Kim, Seung-Jung Park, Young Keun On, June Soo Kim, Il-Young Oh, Eue-Keun Choi, Seil Oh, Yun-Shik Choi, Jong Il Choi, Sang Weon Park, Young-Hoon Kim, Yong-Seog Oh, Man Young Lee, Hong Euy Lim, Young-Soo Lee, Yongkeun Cho, Jun Kim, Kyoung-Suk Rhee, Dong-Il Lee, Dae Kyoung Cho, You-Ho Kim
BACKGROUND: The role of J-waves in the pathogenesis of ventricular fibrillation (VF) occurring in structurally normal hearts is important. METHODS: We evaluated 127 patients who received an implantable cardioverter-defibrillator (ICD) for Brugada syndrome (BS, n = 53), early repolarization syndrome (ERS, n = 24), and patients with unknown or deferred diagnosis (n = 50). Electrocardiography (ECG), clinical characteristics, and ICD data were analyzed. RESULTS: J-waves were found in 27/50 patients with VF of unknown/deferred diagnosis...
February 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27988240/intraoperative-spinal-cord-monitoring-lesional-level-diagnosis
#16
M Gavaret, S Pesenti, M S Diop-Sene, E Choufani, G Bollini, J-L Jouve
BACKGROUND: In spinal deformity surgery, iatrogenic spinal cord injury is the most feared complication. Intraoperative monitoring (IOM) of the spinal cord assesses its functional integrity and allows significant reduction of the rate of spinal cord injury. HYPOTHESIS: In case of severe IOM alert, lesional level diagnosis constitutes supplementary and useful information. MATERIAL AND METHODS: This study was retrospective and monocentric. In our institution, 1062 pediatric spinal deformity surgeries have been monitored since 2004...
December 14, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27890733/differences-in-the-onset-mode-of-ventricular-tachyarrhythmia-between-patients-with-j-wave-in-anterior-leads-and-those-with-j-wave-in-inferolateral-leads
#17
Tsukasa Kamakura, Mitsuru Wada, Kohei Ishibashi, Yuko Y Inoue, Koji Miyamoto, Hideo Okamura, Satoshi Nagase, Takashi Noda, Takeshi Aiba, Satoshi Yasuda, Wataru Shimizu, Shiro Kamakura, Kengo Kusano
BACKGROUND: The pathophysiological mechanism of J wave in anterior leads (A-leads) and inferolateral leads (L-leads) remains unclear. OBJECTIVE: We investigated the onset mode and circadian distribution of ventricular tachyarrhythmia (VTA) episodes between patients with early repolarization syndrome (ERS) and Brugada syndrome (BrS). METHODS: The study enrolled 35 patients with ERS and 52 patients with type 1 BrS with spontaneous ventricular fibrillation who were divided into 4 groups: ERS(A+L) (n = 15), patients with ERS who had a non-type 1 Brugada pattern electrocardiogram in any A-leads (second to fourth intercostal spaces) in control and/or after drug provocation tests; ERS(L) (n = 20), patients with ERS with J wave only in L-leads; BrS(A) (n = 24), patients with BrS without J wave in L-leads; and BrS(A+L) (n = 28), patients with BrS with J wave in L-leads...
November 23, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27885745/exaggerated-reactivity-of-parasympathetic-nerves-is-involved-in-ventricular-fibrillation-in-j-wave-syndrome
#18
Tetsuji Shinohara, Hidekazu Kondo, Toyokazu Otsubo, Akira Fukui, Kunio Yufu, Mikiko Nakagawa, Naohiko Takahashi
INTRODUCTION: Brugada syndrome (BrS) and early repolarization syndrome (ERS) are termed the J-wave syndrome. In most cases of J-wave syndrome, ventricular fibrillation (VF) often occurs around midnight or in the early morning when parasympathetic tone is augmented. OBJECTIVE: The purpose of this study was to clarify the relationship between VF and autonomic nervous activity in patients with J-wave syndrome. METHODS AND RESULTS: We enrolled 28 consecutive patients with J-wave syndrome (20 BrS and 8 ERS) in whom implantable cardioverter defibrillators (ICDs) were implanted between January 2002 and December 2014...
November 25, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27830074/sodium-channel-blockade-unmasked-brugada-electrocardiographic-pattern-in-a-patient-with-complete-right-bundle-branch-block-and-early-repolarization-in-the-lateral-leads
#19
Shozo Konishi, Hitoshi Minamiguchi, Yuji Okuyama, Yasushi Sakata
Early repolarization syndrome (ERS) and Brugada syndrome (BrS) share many electrocardiographic and clinical features, and recently have been collectively grouped as J wave syndrome. However, the effects of sodium channel blockers on the J waves differ greatly between ERS and BrS.
November 2016: Clinical Case Reports
https://www.readbyqxmd.com/read/27761155/j-wave-syndromes-expert-consensus-conference-report-emerging-concepts-and-gaps-in-knowledge
#20
Charles Antzelevitch, Gan-Xin Yan, Michael J Ackerman, Martin Borggrefe, Domenico Corrado, Jihong Guo, Ihor Gussak, Can Hasdemir, Minoru Horie, Heikki Huikuri, Changsheng Ma, Hiroshi Morita, Gi-Byoung Nam, Frederic Sacher, Wataru Shimizu, Sami Viskin, Arthur A M Wilde
No abstract text is available yet for this article.
October 2016: Journal of Arrhythmia
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