My heart missed a beat. What could it mean?

我的心跳都停了。这是怎么回事？

Maybe you missed a few beats, but it's a war zone outside.

你晕头了吧 外面都开战了。

His pet, who's name is storm just wondered onto the set and Farnell barely missed a beat.

他的宠物，名叫“风暴”，它刚刚来到片场，但没有影响Farnell的节奏。

The Norton hadn't missed a single beat.

诺顿没有错过任何一个节拍。

His heart missed a beat as he saw the body of a small child at the water’s edge.

【heart】看到水边一具幼儿的尸体时，他心跳都停顿了一下。