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https://www.readbyqxmd.com/read/27332956/exercise-associated-excessive-dynamic-airway-collapse-in-military-personnel
#1
Daniel J Weinstein, James E Hull, Brittany L Ritchie, Jackie A Hayes, Michael J Morris
RATIONALE: Evaluation of military personnel for exertional dyspnea can present a diagnostic challenge, given multiple unique factors that include wide variation in military deployment. Initial consideration is given to common disorders such as asthma, exercise-induced bronchospasm, and inducible laryngeal obstruction. Excessive dynamic airway collapse has not been reported previously as a cause of dyspnea in these individuals. OBJECTIVES: To describe the clinical and imaging characteristics of military personnel with exertional dyspnea who were found to have excessive dynamic collapse of large airways during exercise...
September 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/26565425/exertional-heat-stroke-and-susceptibility-to-malignant-hyperthermia-in-an-athlete-evidence-for-a-link
#2
Mathias Poussel, Philippe Guerci, Pierre Kaminsky, Marie Heymonet, Nathalie Roux-Buisson, Julien Faure, Emilien Fronzaroli, Bruno Chenuel
OBJECTIVE: To describe the possible association (pathophysiologic and clinical features) between exertional heat stroke (EHS) and malignant hyperthermia (MH). BACKGROUND: Both EHS and MH are acute and life-threatening disorders. It has repeatedly been shown that EHS can occur in well-trained patients with known MH-associated mutation in the RYR1 gene in the absence of any extreme environmental conditions or extreme physical activity, thereby supporting a possible link between EHS and MH...
November 2015: Journal of Athletic Training
https://www.readbyqxmd.com/read/26541712/supraglottoplasty-as-treatment-of-exercise-induced-laryngeal-obstruction-eilo
#3
Camilla Slot Mehlum, Emil Schwarz Walsted, Christian Godballe, Vibeke Backer
Breathing difficulties during exertion may be caused by exercise-induced laryngeal obstruction (EILO). The diagnosis depends on visualization of the larynx during exercise, i.e. by continuous laryngoscopic exercise (CLE) test. In case of severe supraglottic collapse and pronounced symptoms during strenuous exertion, surgical treatment (supraglottoplasty) has been suggested. The aims of this study were to evaluate outcome and patient satisfaction after supraglottoplasty for EILO and to compare our results with previously reported data...
April 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/25757006/exercise-collapse-associated-with-sickle-cell-trait-ecast-case-report-and-literature-review
#4
REVIEW
Richard D Quattrone, E Randy Eichner, Anthony Beutler, W Bruce Adams, Francis G O'Connor
Sickle cell trait (SCT) has been associated with exertional collapse (ECAST) and exercise-related sudden death in athletes and military warfighters. The mechanisms underlying ECAST remain controversial in the sports medicine community. Multiple case presentations and anecdotal reports postulate the role of extraordinary exercise intensity, but other risk factors including dehydration, heat, previous exertional rhabdomyolysis, genetic cofactors, and dietary supplements have been cited as potential contributors...
March 2015: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/25735033/exercise-induced-cardiac-arrest-in-a-sickle-cell-trait-positive-air-force-recruit-a-case-report
#5
Kevin A Fajardo, Juste Tchandja
In October 2011, a sickle cell trait (SCT)-positive Air Force recruit collapsed and died immediately following his physical fitness test. The cause of death was reported to be a cardiac dysrhythmia secondary to an acute sickling crisis. Although it is well known that SCT-positive individuals have a significant risk of exercise-related death (ERD), this case is notable in that none of the commonly cited risk factors were present, including exertional heat injury, dehydration, training at altitude, and rhabdomyolysis...
March 2015: Military Medicine
https://www.readbyqxmd.com/read/25568759/exertional-sickling-questions-and-controversy
#6
Morey A Blinder, Sarah Russel
Sickle cell trait (SCT) occurs in about 8% of African-Americans and is often described to be of little clinical consequence. Over time, a number of risks have emerged, and among these are rare but catastrophic episodes of sudden death in athletes and other individuals associated with physical activities which is often described as exercise collapse associated with sickle trait (ECAST). Despite an epidemiologic link between SCT and sudden death as well as numerous case reports in both medical literature and lay press, no clear understanding of the key pathophysiologic events has been identified...
November 19, 2014: Hematology Reports
https://www.readbyqxmd.com/read/25326844/managing-collapsed-or-seriously-ill-participants-of-ultra-endurance-events-in-remote-environments
#7
REVIEW
Martin D Hoffman, Ian R Rogers, Jeremy Joslin, Chad A Asplund, William O Roberts, Benjamin D Levine
Increasing participation in ultramarathons and other ultra-endurance events amplifies the potential for serious medical issues during and immediately following these competitions. Since these events are often located in remote settings where access may be extremely limited; the diagnostic capabilities, treatment options, and expectations of medical care may differ from those of urban events. This work outlines a process for assessment and treatment of athletes presenting for medical attention in remote environments, with a focus on potentially serious conditions such as major trauma, acute coronary syndrome, exertional heat stroke, hypothermia, hypoglycemia, exercise-associated hyponatremic encephalopathy, severe dehydration, altitude illness, envenomation, anaphylaxis, and bronchospasm...
February 2015: Sports Medicine
https://www.readbyqxmd.com/read/25240413/heat-related-illness-in-sports-and-exercise
#8
Andrew W Nichols
Exertional heat-related illness (EHRI) is comprised of several states that afflict physically active persons when exercising during conditions of high environmental heat stress. Certain forms of EHRI may become life threatening if not treated. Exertional heat stroke (EHS), characterized by a core body temperature of >40 ° C and mental status changes, is the most severe form of EHRI. EHS must be treated immediately with rapid body cooling to reduce morbidity and mortality. Many EHRI cases are preventable by following heat acclimatization guidelines, modifying sports and exercise sessions during conditions of high environmental heat stress, maintaining adequate hydration, avoiding exertion in the heat when ill, and by educating sports medicine personnel, coaches, parents, and athletes on the early recognition and prevention of EHRI...
December 2014: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/23478561/specific-exercise-heat-stress-protocol-for-a-triathlete-s-return-from-exertional-heat-stroke
#9
Evan C Johnson, Fred W Kolkhorst, Allen Richburg, Andy Schmitz, John Martinez, Lawrence E Armstrong
A triathlete collapsed with exertional heatstroke (EHS) during 2 races over 3 months. The American College of Sports Medicine recommends a heat tolerance test (HTT) following EHS if there is a concern with return to play. The classical walking HTT may not be the best test to evaluate elite triathletes' heat tolerance due to race intensity, nor is it suited to evaluate acclimation ability, which may play a role in risk of heat illness. Is the athlete capable of returning to racing or should he retire from sport due to heat intolerance? Up to 90 min of cycling (70% of V˙O2max; 36°C, 50% relative humidity) was followed by 9 d of exercise heat acclimation and a final identical exercise heat stress test...
March 2013: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/23055055/sudden-cardiac-death-after-repair-of-anomalous-origin-of-left-coronary-artery-from-right-sinus-of-valsalva-with-an-interarterial-course-case-report-and-review-of-the-literature
#10
A L Nguyen, F Haas, J Evens, J M P J Breur
Anomalous aortic origin of the coronary artery from the opposite sinus with interarterial course (AAOCA) is a rare condition with a high risk of sudden cardiac death (SCD) during or after strenuous exertion. SCD after repair of this anomaly is extremely rare. Here we present a 15-year-old athlete who collapsed on the basketball court in whom an anomalous origin of the left coronary artery from the right sinus of Valsalva with interarterial course (ALCA) was diagnosed. In spite of extensive pre-sport participation testing, SCD occurred shortly after surgical correction...
November 2012: Netherlands Heart Journal
https://www.readbyqxmd.com/read/22878135/-aging-of-the-respiratory-system-anatomical-changes-and-physiological-consequences
#11
REVIEW
W Ketata, W K Rekik, H Ayadi, S Kammoun
The respiratory system undergoes progressive involution with age, resulting in anatomical and functional changes that are exerted on all levels. The rib cage stiffens and respiratory muscles weaken. Distal bronchioles have reduced diameter and tend to be collapsed. Mobilized lung volumes decrease with age while residual volume increases. Gas exchanges are modified with a linear decrease of PaO(2) up to the age of 70 years and a decreased diffusing capacity of carbon monoxide. Ventilatory responses to hypercapnia, hypoxia and exercise decrease in the elderly...
October 2012: Revue de Pneumologie Clinique
https://www.readbyqxmd.com/read/22811029/acsm-and-champ-summit-on-sickle-cell-trait-mitigating-risks-for-warfighters-and-athletes
#12
Francis G O'Connor, Michael F Bergeron, Joyce Cantrell, Philippe Connes, Kimberly G Harmon, Edward Ivy, John Kark, Dave Klossner, Peter Lisman, Bryce K Meyers, Karen O'Brien, Kwaku Ohene-Frempong, Alexis A Thompson, James Whitehead, Patricia A Deuster
INTRODUCTION: An estimated 300 million people worldwide have sickle cell trait (SCT). Although largely benign, SCT has been associated with exertional rhabdomyolysis and exercise-related sudden death in warfighters/athletes (WA). The National Collegiate Athletic Association's policy to confirm a student athlete's SCT status during their preparticipation medical examination prompted reaction from some organizations regarding the rationale and ethical justification of the policy. METHODS: On September 26 and 27, 2011, a summit, composed of military and civilian experts in sports medicine and SCT, was convened at the Uniformed Services University in Bethesda, MD...
November 2012: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/22721783/diagnosing-aerodynamic-supraglottic-collapse-with-rest-and-exercise-flexible-laryngoscopy
#13
REVIEW
Gregory R Dion, Robert L Eller, Roy F Thomas
OBJECTIVE: Laryngomalacia is best known as a self-resolving infantile disorder characterized by inspiratory stridor with occlusion of the larynx by collapse of arytenoid tissues due to Bernoulli forces. Adult laryngomalacia has been sporadically described in the literature. We identified a series of patients with aerodynamic supraglottic collapse mimicking laryngomalacia in our Otolaryngology clinic. STUDY DESIGN: Case series. METHODS/PATIENTS: A series of five patients from our Otolaryngology clinic with aerodynamic supraglottic collapse presented with complaints ranging from noisy breathing to dyspnea with exertion...
November 2012: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/22669856/exercise-induced-anaphylaxis
#14
Taro Shimizu, Yasuharu Tokuda
A 23-year-old man presented with acute flushing, pruritus and warmth followed by collapse after vigorous exercise in a gymnasium. After resting for 30 min and receiving a rapid infusion of 0.9% sodium chloride, he was finally stable. He admitted that he had a similar experience 5 years earlier during exercise. Based on the patient's history, his symptoms were attributed to exercise-induced anaphylaxis. None of his episodes was associated with any suspicious co-triggers of anaphylaxis. He was successfully discharged from hospital without any complications after receiving guidance on how to prevent this condition...
2012: BMJ Case Reports
https://www.readbyqxmd.com/read/22633706/large-hiatal-hernia-at-chest-radiography-in-a-woman-with-cardiorespiratory-symptoms
#15
Daniele Torres, Gaspare Parrinello, Mauro Cardillo, Marina Pomilla, Caterina Trapanese, Bellanca Michele, Umberto Lupo, Caterina Schimmenti, Francesco Cuttitta, Rossella Pietrantoni, Danai Vogiatzis, Giuseppe Licata
Hiatal hernia (HH) is a frequent entity. Rarely, it may exert a wide spectrum of clinical presentations mimicking acute cardiovascular events such as angina-like chest pain until manifestations of cardiac compression that can include postprandial syncope, exercise intolerance, respiratory function, recurrent acute heart failure, and hemodynamic collapse. A 69-year-old woman presented to the emergency department complaining of fatigue on exertion, cough, and episodes of restrosternal pain with less than 1 hour of duration...
November 2012: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/22404936/epinephrine-modulates-bcam-lu-and-icam-4-expression-on-the-sickle-cell-trait-red-blood-cell-membrane
#16
Jamie L Maciaszek, Biree Andemariam, Greg Huber, George Lykotrafitis
Collapse and sudden death in physical training are the most serious complications of sickle cell trait (SCT). There is evidence that erythrocytes in SCT patients aggregate during strenuous exercise, likely because of adhesive interactions with the extracellular matrix (ECM) and endothelial cells, and because of their irregular viscoelastic properties. This results in inflammation, blood flow impairment, and vaso-occlusive events. However, the exact role of stress conditions and how they lead to these complications is virtually unknown...
March 7, 2012: Biophysical Journal
https://www.readbyqxmd.com/read/22338981/exertional-sickling-deaths-in-army-recruits-with-sickle-cell-trait
#17
Kenneth Ferster, E Randy Eichner
Exertional sickling from sickle cell trait (SCT) can pose a grave risk for some military recruits and is a troubling cause of death in college athletes. We report the cases of two U.S. Army recruits with undetected SCT who collapsed and soon died from metabolic complications of exertional sickling as they struggled to finish in time the 2-mile run of the Army Physical Fitness Test, having failed this test on prior attempts. These cases are similar to other military cases and to recent sickling deaths in college track and football...
January 2012: Military Medicine
https://www.readbyqxmd.com/read/22255042/human-thermoregulatory-system-state-estimation-using-non-invasive-physiological-sensors
#18
Mark J Buller, John Castellani, Warren S Roberts, Reed W Hoyt, Odest Chadwicke Jenkins
Small teams of emergency workers/military can often find themselves engaged in critical, high exertion work conducted under challenging environmental conditions. These types of conditions present thermal work strain challenges which unmitigated can lead to collapse (heat exhaustion) or even death from heat stroke. Physiological measurement of these teams provides a mechanism that could be an effective tool in preventing thermal injury. While indices of thermal work strain have been proposed they suffer from ignoring thermoregulatory context and rely on measuring internal temperature (IT)...
2011: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/21948122/exercise-associated-collapse-an-evidence-based-review-and-primer-for-clinicians
#19
REVIEW
Chad A Asplund, Francis G O'Connor, Timothy D Noakes
Exercise-associated collapse (EAC) commonly occurs after the completion of endurance running events. EAC is a collapse in conscious athletes who are unable to stand or walk unaided as a result of light headedness, faintness and dizziness or syncope causing a collapse that occurs after completion of an exertional event. Although EAC is perhaps the most common aetiology confronted by the medical provider attending to collapsed athletes in a finish-line tent, providers must first maintain vigilance for other potential life-threatening aetiologies that cause collapse, such as cardiac arrest, exertional heat stroke or exercise-associated hyponatraemia...
November 2011: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/21127213/acute-effect-of-muscle-stretching-on-the-steadiness-of-sustained-submaximal-contractions-of-the-plantar-flexor-muscles
#20
Emika Kato, Stéphanie Vieillevoye, Costantino Balestra, Nathalie Guissard, Jacques Duchateau
This paper examines the acute effect of a bout of static stretches on torque fluctuation during an isometric torque-matching task that required subjects to sustain isometric contractions as steady as possible with the plantar flexor muscles at four intensities (5, 10, 15, and 20% of maximum) for 20 s. The stretching bout comprised five 60-s passive stretches, separated by 10-s rest. During the torque-matching tasks and muscle stretching, the torque (active and passive) and surface electromyogram (EMG) of the medial gastrocnemius (MG), soleus (Sol), and tibialis anterior (TA) were continuously recorded...
February 2011: Journal of Applied Physiology
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