heart skipping a beat

She smiled—her heart skipping a beat—and then looked at the books on the table.

The next time they rounded a corner, Thomas faltered, his heart skipping a beat when he saw movement up ahead.

But the one about your heart skipping a beat during a sneeze is not completely unfounded.

Mr. Nadler’s exegesis on how the internal rhythms and syntax of the chorus of “Embraceable You” express an image in the verse of the heart skipping a beat, is another example of the show’s microscopic focus.

"I s'pose that's Susy," thought Robin, her heart skipping a beat with a terror of shyness.