Service de Physiologie et d'Explorations Fonctionnelles, CHU de Strasbourg, Strasbourg, France.
Med Sci Sports Exerc. 2013 Mar;45(3):411-4. doi: 10.1249/MSS.0b013e318276c9a4.
Training induces volume- and time-dependent morphological and functional changes in the heart. Heart rhythm disorders, such as atrial arrhythmia (including atrial fibrillation and atrial flutter), are a well-established consequence of such long-term endurance practice. Although resting bradycardia and first-degree atrioventricular persist in veteran athletes, a higher conduction system impairment has never been reported neither at rest nor during exercise. We report here two cases of Type II second-degree atrioventricular block occurring during exercise in middle-age well-trained athletes. Because animal and human studies suggest that a progressive myocardial fibrosis could explain such phenomenon, long-term training could also have consequences on the conduction pathways.
训练会导致心脏在体积和时间上发生形态和功能的变化。心脏节律紊乱，如房性心律失常（包括心房颤动和心房扑动），是长期耐力训练的一个明确后果。尽管在资深运动员中仍然存在静息心动过缓和一度房室传导阻滞，但在静息或运动时从未报告过更高的传导系统损伤。我们在此报告两例中年训练有素的运动员在运动时发生的 II 度房室传导阻滞。由于动物和人体研究表明，进行性心肌纤维化可以解释这种现象，因此长期训练也可能对传导通路产生影响。
