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sudden death and exercise

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https://www.readbyqxmd.com/read/29779123/pulmonary-valve-replacement-after-repaired-tetralogy-of-fallot
#1
REVIEW
Hideki Tatewaki, Akira Shiose
In this review article, we describe pulmonary valve replacement (PVR) late after repaired Tetralogy of Fallot (TOF). Since the introduction of surgical intervention for patients with TOF in 1945, surgical management of TOF has dramatically improved early survival with mortality rates, less than 2-3%. However, the majority of these patients continue to experience residual right ventricular outflow tract pathology, most commonly pulmonary valve regurgitation (PR). The patients are generally asymptomatic during childhood and adolescence and, however, are at risk for severe PR later which can result in exercise intolerance, heart failure, arrhythmias, and sudden death...
May 19, 2018: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29764528/symptomatic-myocardial-bridging-a-frequently-occurring-coronary-variation-can-cause-severe-myocardial-ischaemia-in-affected-children-with-underlying-cardiac-conditions
#2
Alexandra Kiess, Marcel Vollroth, Farhad Bakhtiary, Hiroshi Seki, Martin Kostelka, Milan Djukic, Ingo Daehnert, Robert Wagner
Myocardial bridging is a congenital coronary artery anomaly in which the coronary artery has a partly "tunnelled" intramyocardial course. This tunnelling leads to compression of the affected vessel segment during ventricular systole. It is considered to be a benign variation of the norm in about 25% of the population caused by an aberrancy of embryologic coronary development. The bridging is also thought to cause severe cardiac conditions in a few of those affected. The series of six young patients presented here is the largest series so far to report on symptomatic myocardial bridging in children with different underlying heart diseases...
May 16, 2018: Cardiology in the Young
https://www.readbyqxmd.com/read/29749082/effect-of-induced-chronic-atrial-fibrillation-on-exercise-performance-in-standardbred-trotters
#3
Rikke Buhl, Helena Carstensen, Eva Zander Hesselkilde, Bjørg Zinkernagel Klein, Karen Margrethe Hougaard, Kirsten Bomberg Ravn, Ameli Victoria Loft-Andersen, Merle Friederike Fenner, Christian Pipper, Thomas Jespersen
BACKGROUND: Atrial fibrillation (AF) is the most common arrhythmia affecting performance in horses. However, no previous studies have quantified the performance reduction in horses suffering from AF. OBJECTIVES: To quantify the effect of AF on maximum velocity (Vmax ), maximum heart rate (HRmax ), heart rate recovery (T100 ), hematologic parameters and development of abnormal QRS complexes. ANIMALS: Nine Standardbred trotters. METHODS: Two-arm controlled trial...
May 10, 2018: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29745804/protection-against-severe-hypokalemia-but-impaired-cardiac-repolarization-after-intense-rowing-exercise-in-healthy-humans-receiving-salbutamol
#4
Tania Atanasovska, Robert Smith, Claus Graff, Cao Thach Tran, Jacob Melgaard, Jørgen K Kanters, Aaron C Petersen, Antony Tobin, Keld P Kjeldsen, Michael John McKenna
Intense exercise induces pronounced hyperkalemia, followed by transient hypokalemia in recovery. We investigated whether the β2 -agonist salbutamol attenuated the exercise-hyperkalemia, and exacerbated the post-exercise hypokalemia, and whether hypokalemia was associated with impaired cardiac repolarization (QT hysteresis). Eleven healthy adults participated in a randomized, counterbalanced, double-blind trial receiving either 1000 µg salbutamol (SAL) or placebo (PLAC) by inhalation. Arterial plasma potassium concentration ([K+ ]a ) was measured at rest, during 3 min intense rowing exercise and 60 min recovery...
May 10, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29744527/inherited-primary-arrhythmia-disorders-cardiac-channelopathies-and-sports-activity
#5
REVIEW
S Marrakchi, I Kammoun, E Bennour, L Laroussi, M Ben Miled, S Kachboura
Sudden cardiac death (SCD) in an apparently healthy individual is a tragedy. It is important to identify the cause of death and to prevent SCD in potentially at-risk family members. Inherited primary arrhythmia disorders are associated with exercise-related SCD. Despite the well-known benefits of exercise, exercise restriction has been a historical mainstay of therapy for these conditions. However, since familiarity with inherited arrhythmia conditions has increased and patients are often children and young adults, it is necessary to reassess the treatment guidelines regarding exercise constraints...
May 9, 2018: Herz
https://www.readbyqxmd.com/read/29727892/hemostasis-during-extreme-exertion
#6
Cécile Hélène Kicken, Adam Miszta, Hilde Kelchtermans, Bas De Laat
Exercise is protective against cardiovascular disease, but can also provoke sudden cardiac death, a phenomenon referred to as "the exercise paradox." Extreme exertion is known to induce a rebalanced hemostatic state by causing hypercoagulability and concomitantly enhanced fibrinolysis. Over the past decade, novel techniques for quantifying hemostasis have been introduced, which may provide new insights into this process. This review summarizes recent literature on the effect of extreme exertion of both short and long duration on coagulation, fibrinolysis, and recovery of hemostatic balance...
May 4, 2018: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/29720507/comprehensive-assessment-of-coronary-artery-disease-in-sports-related-sudden-cardiac-arrest
#7
Nicole Karam, Louis Pechmajou, Florence Dumas, Wulfran Bougouin, Ardalan Sharifzadehgan, Frankie Beganton, Guillaume Bonnet, Daniel Jost, Lionel Lamhaut, Olivier Varenne, Pierre Aubry, Georgios Sideris, Christian Spaulding, Alain Cariou, Eloi Marijon, Xavier Jouven
Despite the cardiovascular benefits of regular sports, sudden cardiac arrest (SCA) risk is increased during or shortly after exercise. Association with coronary artery disease (CAD) has been described in small studies, mainly autopsic with potential bias given the high sports-related SCA survival, and focusing on young competitive athletes, whereas sports-related SCA occurs mostly in recreational athletes.1-5 Through the Paris Sudden Death Expertise Center prospective registry that includes all SCAs in Paris and suburbs since May 2011, we performed the first broad comprehensive CAD description in sports-related SCAs, with a comparison with matched non-sports-related SCAs...
May 2, 2018: Circulation
https://www.readbyqxmd.com/read/29717103/angina-pectoris-in-young-male-due-to-agenesis-of-left-circumflex-artery
#8
Thomas J Guterbaum, Kristian A Øvrehus, Karsten T Veien, Jacob E Møller, Hans Mickley
BACKGROUND This case study demonstrated that although highly symptomatic, agenesis of the left circumflex artery was a benign finding. Anomalies of the coronary arteries were found to be the cause of sudden death in a young individual. Left circumflex anomalies were not associated with major cardiac events. CASE REPORT A 20-year-old male was admitted due to syncope preceded by chest pain. His electrocardiogram (ECG) showed global ST segment elevation as well as biphasic T waves in anterior precordial leads...
May 2, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29705387/sudden-cardiac-death-in-athletes
#9
REVIEW
Joanna Sweeting, Christopher Semsarian
Sudden cardiac death (SCD) in athletes is a rare but tragic complication of a number of cardiovascular diseases. Inherited causes such as the structural and arrhythmogenic genetic heart conditions are often found or suspected to be the underlying cause of death at post mortem examination. Physical activity and intense exercise may trigger cardiac arrhythmias in individuals with these conditions leading to SCD. Prevention and treatment strategies include individual athlete management strategies, coupled with public health measures such as universal cardiopulmonary resuscitation (CPR) training and availability of automatic external defibrillators (AEDs) in public places, thereby preventing SCD in both athletes and the general population...
April 5, 2018: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29688316/diagnostic-and-therapeutic-strategies-for-arrhythmogenic-right-ventricular-dysplasia-cardiomyopathy-patient
#10
Weijia Wang, Cynthia A James, Hugh Calkins
Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is a rare inherited heart muscle disease characterized by ventricular tachyarrhythmia, predominant right ventricular dysfunction, and sudden cardiac death. Its pathophysiology involves close interaction between genetic mutations and exposure to physical activity. Mutations in genes encoding desmosomal protein are the most common genetic basis. Genetic testing plays important roles in diagnosis and screening of family members. Syncope, palpitation, and lightheadedness are the most common symptoms...
April 23, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29673853/biventricular-dyssynchrony-on-cardiac-magnetic-resonance-imaging-and-its-correlation-with-myocardial-deformation-ventricular-function-and-objective-exercise-capacity-in-patients-with-repaired-tetralogy-of-fallot
#11
Pantelis Kalaitzidis, Stefan Orwat, Aleksander Kempny, Radke Robert, Brigitte Peters, Samir Sarikouch, Philipp Beerbaum, Helmut Baumgartner, Gerhard-Paul Diller
BACKGROUND: Electrical dyssynchrony and prolonged QRS duration are common in patients with repaired tetralogy of Fallot (ToF). It has been linked to increased risk of sudden cardiac death and right ventricular (RV) dysfunction. We investigated myocardial dyssynchrony using cardiac magnetic resonance imaging (CMR) and feature tracking analysis (FT) in this setting and compared it to myocardial deformation, conventional parameters of ventricular dysfunction and clinical parameters. METHODS AND RESULTS: Patients underwent standardized CMR investigations as part of a nationwide study...
April 12, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29672910/ontario-racehorse-death-registry-2003-2015-descriptive-analysis-and-rates-of-mortality
#12
P W Physick-Sheard, A Avison, E Chappell, M MacIver
BACKGROUND: The Province of Ontario maintains a registry of racehorse deaths occurring within 60 days of a race or trial entry that provides insight into mortality rates and costs of competition. OBJECTIVES: To characterise and quantify mortality and identify breed differences. STUDY DESIGN: Retrospective annualised cohort study. METHODS: The Ontario Death Registry for 2003-2015, containing 1713 cases, was audited and information on the relationship between death and official work added...
April 19, 2018: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29666096/devil-is-in-the-detail
#13
John Roshan Jacob, Amal Paul, Anoop George Alex
A 15-year-old girl of Asian origin, hailing from a rural agrarian background, presented with history of multiple episodes of dizziness for 3 years. The episodes were precipitated mostly by emotional and/or physical stress and relieved on lying down, with a few episodes culminating in transient loss of consciousness. As preliminary cardiac and neurological evaluation were normal, she was being treated by the primary physician as a case of probable psychogenic syncope, supported by the consistent association of the episodes with emotional stress...
April 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29655822/clinical-spectrum-and-management-of-heart-failure-in-hypertrophic-cardiomyopathy
#14
REVIEW
Barry J Maron, Ethan J Rowin, James E Udelson, Martin S Maron
Heart failure (HF), characterized by excessive exertional dyspnea, is a common complication within the broad clinical spectrum of hypertrophic cardiomyopathy (HCM). HF has become an increasingly prominent management issue with the reduction in sudden deaths due to use of implantable defibrillators in this disease. Exertional dyspnea ranges in severity from mild to severe (New York Heart Association functional classes II to IV) and not uncommonly becomes refractory to medical management, leading to progressive disability, but largely in the absence of pulmonary congestion and volume overload requiring hospitalization...
May 2018: JACC. Heart Failure
https://www.readbyqxmd.com/read/29652731/obesity-and-cardiovascular-risk-a-call-for-action-from-the-european-society-of-hypertension-working-group-of-obesity-diabetes-and-the-high-risk-patient-and-european-association-for-the-study-of-obesity-part-b-obesity-induced-cardiovascular-disease-early-prevention
#15
Vasilios Kotsis, Konstantinos Tsioufis, Christina Antza, Gino Seravalle, Antonio Coca, Cristina Sierra, Empar Lurbe, Stella Stabouli, Bojan Jelakovic, Josep Redon, Pau Redon, Peter M Nilsson, Jens Jordan, Dragan Micic, Nicholas Finer, Deborah R Leitner, Hermann Toplak, Lale Tokgozoglu, Vasilios Athyros, Moses Elisaf, Theodosios D Filippatos, Guido Grassi
: Obesity predisposes for atrial fibrillation, heart failure, sudden cardiac death, renal disease and ischemic stroke, which are the main causes of cardiovascular hospitalization and mortality. As obesity and the cardiovascular effects on the vessels and the heart start early in life, even from childhood, it is important for health policies to prevent obesity very early before the disease manifestation emerge. Key roles in the prevention are strategies to increase physical exercise, reduce body weight and to prevent or treat hypertension, lipids disorders and diabetes earlier and efficiently to prevent cardiovascular complications...
April 12, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29610596/catecholaminergic-polymorphic-ventricular-tachycardia-looking-to-the-future
#16
Andreea Elena Velcea, Calin Siliste, Dragos Vinereanu
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare inheritable cardiac disorder, characterized by polymorphic ventricular tachycardia (PVT) or bidirectional ventricular tachycardia, triggered by adrenergic stress, and manifested most frequently as syncope or sudden cardiac death. The disease has a heterogeneous genetic basis, with mutations in the genes encoding the ryanodine and calsequestrin channels accounting for the majority of cases. The diagnosis of CPVT is established in individuals with polymorphic ventricular premature beats, PVT or bidirectional ventricular tachycardia documented during exercise or adrenergic stress, who have a structurally normal heart and normal resting ECG...
December 2017: Mædica
https://www.readbyqxmd.com/read/29600967/ventricular-fibrillation-induced-by-radiofrequency-energy-delivery-for-premature-ventricular-contractions-arising-from-the-right-ventricular-outflow-tract-is-implantablecardioverterdefibrillator-indicated
#17
Michał Orczykowski, Paweł Derejko, Piotr Urbanek, Robert Bodalski, Radosław Lenarczyk, Dariusz Kozłowski, Edward Koźluk, Damian Łasocha, Maciej Sterliński, Zbigniew Kalarus, Maria Bilińska, Łukasz Szumowski
INTRODUCTION    Inadvertently induced ventricular fibrillation (VF) by radiofrequency (RF) energy delivery for premature ventricular complexes (PVCs) is a rare phenomenon; nevertheless, it is crucial to assess long‑term risk of sudden cardiac death in these patients. OBJECTIVES    The aim of our study was to define the long‑term prognosis in patients with normal ejection fraction (EF), in whom VF was inadvertently induced by RF energy application during ablation of symptomatic idiopathic PVCs originating from the right ventricular outflow tract (RVOT)...
March 29, 2018: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/29590732/genetic-aspects-of-hereditary-arrhythmogenic-syndromes-in-children-and-adults
#18
REVIEW
Vesna Miranović, Snežana Crnogorac
Recent research has revealed the genetic etiology of a number of heart diseases that cause sudden cardiac death. Lethal channelopathies are of great importance among the genetically determined heart diseases. Their basic characteristics are unpredictable and deadly nature, autosomal dominant inheritance with variable expressivity and incomplete penetrance in structurally normal heart, and absence of morphological and histological clues that a standard autopsy can identify. Minimum screening of the relatives of sudden cardiac death victims involves taking medical history, physical examination, electrocardiography, echocardiography, and exercise testing...
December 2017: Acta Clinica Croatica
https://www.readbyqxmd.com/read/29577764/-immunoadsorption-in-a-patient-with-dilated-cardiomyopathy-the-first-case-in-hungary
#19
Pál Soltész, Melinda Vass, Ágnes Diószegi, Ivetta Mányiné Siket, Ildikó Garai, Csaba Kun, Orsolya Bene, Attila Kertész, István Édes
Dilated cardiomyopathy is the main cause of heart transplantation. The etiology is unknown in almost half of the cases. Many cardiac specific antibodies have been identified till now which can cause decreased cardiac function, ventricular tachycardia or sudden heart death. The prognosis of DCM is poor despite the development of medical treatment. Immunoadsorption is hopeful since, with the removal of antibodies, cardiac function and NYHA class can improve and LVAD/heart transplantation-free survival can be prolonged...
April 2018: Orvosi Hetilap
https://www.readbyqxmd.com/read/29577254/prevalence-and-risk-factors-for-medical-events-following-exercise-at-australian-greyhound-race-meetings
#20
S L Karamatic, G A Anderson, B W Parry, R F Slocombe, C S Mansfield
AIM: A prospective, observational study to determine the prevalence of post-exercise conditions at Australian Greyhound race meetings and to assess association with race performance and other environmental, race- and dog-related factors was undertaken. METHODS: A total of 4020 starters were observed (2813 Greyhounds, 1009 trainers, 536 races, 52 race meets, 48 race dates and 11 race tracks) following a race. The presence of diaphragmatic flutter (DF), ataxia, seizure, collapse or sudden death was recorded...
April 2018: Australian Veterinary Journal
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