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1. Does Deep Bradycardia Increase the Risk of Arrhythmias and Syncope in Endurance Athletes?

Author

N. Thillaye du Boullay, Guy Carrault, David Matelot, Frédéric Schnell, Gaelle Kervio, Nadine Khodor, Nima Endjah, F. Carré, Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Pontchaillou [Rennes], CIC-IT Rennes, Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Adult, Male, Bradycardia, medicine.medical_specialty, Physical Therapy, Sports Therapy and Rehabilitation, Syncope, Young Adult, 03 medical and health sciences, 0302 clinical medicine, Heart Rate, Internal medicine, Heart rate, medicine, Humans, Orthopedics and Sports Medicine, Prospective Studies, Young adult, Prospective cohort study, computer.programming_language, Sedentary lifestyle, biology, sed, business.industry, Athletes, Syncope (genus), Arrhythmias, Cardiac, biology.organism_classification, Anesthesia, Electrocardiography, Ambulatory, Exercise Test, Physical Endurance, Cardiology, cardiovascular system, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Sedentary Behavior, medicine.symptom, business, computer, 030217 neurology & neurosurgery, Follow-Up Studies, circulatory and respiratory physiology
Abstract

International audience; The aim of this study was to evaluate whether endurance athletes who exhibit deep bradycardia are more prone to arrhythmias and reflex syncope than their non-bradycardic peers. 46 healthy men (ages 19-35) were divided into 3 groups based on whether they were sedentary (SED,6 h/week), and non-bradycardic (NB, resting heart rate (HR)≥60 bpm) or bradycardic (B, resting HR

Published
2016

2. 245: Are bradycardic endurance trained athletes more at risk of syncope and arrhythmias than non bradycardic ones?

Author

Nathalie Thillaye-Du-Boullay, Corinne Beaufort, François Carré, Gaelle Kervio, Nima Endjah, Frédéric Schnell, and David Matelot

Subjects
Bradycardia, medicine.medical_specialty, biology, Athletes, business.industry, Syncope (genus), biology.organism_classification, Endurance training, Internal medicine, Heart rate, medicine, Physical therapy, Cardiology, Maximal exercise, medicine.symptom, Risk factor, Cardiology and Cardiovascular Medicine, business, Holter monitoring
Abstract

Purpose Endurance trained athletes show more positive tilt tests and more arrhythmias than non-trained people. The mechanisms remain unclear, several hypotheses exist including structural and autonomic cardiac adaptations. Training bradycardia (heart rate (HR) Method Untrained non bradycardic subjects (UTNB, n=16, HR=66,1±5,9 bpm) were compared with trained non bradycardic athletes (TNB, n=13, HR=61,3±3,3 bpm) to specify the influence of endurance training. Also TNB were compared to trained bradycardic athletes (TB, n=17, HR=43,8±3,1 bpm) to specify the influence of bradycardia. All subjects were healthy men between 18 and 36 years old. They performed incremental maximal exercise test, resting echocardiography, 24h ECG Holter monitoring, and 45 min of an 80° tilt test. Results Training history did not differ between TNB and TB (8,3±2,8 vs 8,8±3,1 hours/week since 8,1±4,2 vs 6,4±4,6 years). VO2max was 43,5± 5,9 ml/min/kg in UTNB, 67,9±6,2 in TNB (p Conclusion From our results, training bradycardia does not seem to be an additional risk factor for syncope or arrhythmias in endurance athletes. However VASIS II reactions are more frequent in bradycardic athletes who experienced syncope. Download : Download full-size image Table – Tilt test results in NTNB, TNB and TB sujects

Published
2013

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