Chinese to English Medical Medical: Cardiology

This appears to be a cardiac surgical procedure--it is in a table describing conditions under which an insured under a special rider covering medical treatment under a life insurance contract. The full sentence is:
对于“心脏瓣膜手术”若未达重大疾病保险金的给付标准，但首次实际接受了经非胸廓切开的经胸壁打孔内镜手术或经皮血管穿刺导管介入手术来进行心脏瓣膜置换或修复，我们将按约定给付雪中送炭治疗保险金.

Any help would be greatly appreciated!