Results (1) There was no symptom in more patients, and in a few patients, the main manifestation was chest pain, palpitation, dizzy, fatigue and anxiety.

• 结果(1)大部分患者无症状,有症状的主要表现为胸痛、心悸、头晕、乏力、焦虑等。典型体征为心尖区闻及喀喇音和收缩期杂音。