研究人员指出，不是每个人都可以进行“瓣中瓣”移植。

Not every individual would be a candidate for valve-in-valve transplants, the researchers point out.

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然而，“瓣中瓣”手术是微创的，因而可能危险也降低。

The valve-in-valve surgery, however, is less invasive and thus may be less risky.

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这些新发现超越了24例患者接受“瓣中瓣”移植的事件本身，他们致力于心脏瓣膜疾病治疗的新进展，他写道。

The new findings "go far beyond the fact that 24 ill patients received valve-in-valve replacement. They focus on the next step in the therapy of valvular heart disease," he writes.

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