1) Be still my heart sound 2) Excited beating sound 3) Excited heart beating sound 4) Fluttering sound 5) Footsteps sound 6) Hail noise 7) Happy heartbeat sound 8) Heart murmur 9) Heart sound 10) Heart throb 11) Heartbeat 12) Heartbeat sound 13) Heartfelt flutter 14) Hearty response 15) It comes from the heart 1) Roll 
• (n.) A light, repeated sound; a pattering, as of the rain. • (adv.) In a flutter; with palpitation or quick succession of beats.
Pit'a·pat` adverb [ An onomatopoetic reduplication of pat a light, quick blow.] In a flutter; with palpitation or quick succession of beats. Lowell. 'The fox's heart went pitapat .' L'Estrange. Pit'a·pat` noun A light, repeated sound; a pattering, as of the rain. 'The pitapat of a pretty foot.' Dryden.