Cardiac fibromas are the second most common benign primary tumour of the heart in the children; the clinical features include chest pain, arrhythmia, low cardiac output due to outflow tract obstruction, and sudden cardiac death. Sports are associated with an increased risk for sudden death in athletes who are affected by cardiovascular conditions predisposing to life-threatening arrhythmias. We present a case report of 10-year-old asymptomatic boy who was referred to the paediatric cardiology department by his general practitioner for cardiac examination before participation in competitive sports. The electrocardiogram showed premature ventricular contractions originated from inferior of left ventricle. A mass was detected by 2D transthoracic echocardiography, and it was found to be compatible with fibroma on MRI. In some cases, cardiac tumours are asymptomatic as in our patient. Electrocardiogram abnormalities require detailed cardiac imaging with echocardiogram, and if necessary CT/MRI. In this article, we emphasise that detailed cardiac examination of individuals before participating in competitive sports is vital.

心脏纤维瘤是儿童心脏第二常见的良性原发性肿瘤；临床特征包括胸痛、心律失常、流出道阻塞引起的低心输出量和心源性猝死。运动与受心血管疾病影响的运动员猝死风险增加有关，这些疾病易患危及生命的心律失常。我们报告了一个 10 岁无症状男孩的病例报告，他在参加竞技运动前被全科医生转诊到儿科心脏病科进行心脏检查。心电图显示室性早搏起源于左心室下方。二维经胸超声心动图检测到肿块，MRI 发现其与纤维瘤相符。在某些情况下，与我们的患者一样，心脏肿瘤没有症状。心电图异常需要详细的心脏超声心动图成像，必要时还需要 CT/MRI。在本文中，我们强调在参加竞技运动之前对个人进行详细的心脏检查至关重要。