Adjective
heartstopping (comparative more heartstopping, superlative most heartstopping)
Very exciting or shocking, as though to cause one's heart to skip beats.
There's even a heartstopping saxophone solo. Source: Internet
The opera may not be one of Puccini’s best-known, but it’s a score of heartstopping loveliness, featuring some of the composer’s very best tunes, including this one. Source: Internet