Bernuth G, Lang D, Hofstetter R
Z Kardiol. 1977 Feb;66(2):55-60.
Two children with exercise-induced syncopes are described. There was no evidence for congenital or acquired cardiac defects, cardiomyopathy or myocarditis in either of them. Both had sinus bradycardia and a consistently normal QT-interval at rest. In both, exercise induced regularly a multiform ventricular tachycardia, additionally in one on occasion a bidirectional, in the other a supraventricular tachycardia. Beta receptor blocking agents prevented tachyarrhythmias in both. Under treatment with beta receptor blocking agents, one child remained without syncopes, the other died suddenly. These cases underline the possiblility that exercise-induced syncopes may be caused by tachyarrhythmias even if the QT-interval of the resting Ecg is normal. In suspicious cases an exercise-Ecg is indicated.
本文描述了两名运动诱发晕厥的儿童。他们均无先天性或后天性心脏缺陷、心肌病或心肌炎的证据。两人静息时均有窦性心动过缓且QT间期始终正常。两人运动时均规律诱发多形性室性心动过速，其中一人偶尔诱发双向性室性心动过速，另一人诱发室上性心动过速。β受体阻滞剂可预防两人的快速性心律失常。在β受体阻滞剂治疗下，一名儿童未再发生晕厥，另一名儿童突然死亡。这些病例强调了即使静息心电图QT间期正常，运动诱发晕厥也可能由快速性心律失常引起的可能性。在可疑病例中，建议进行运动心电图检查。
