To beat rapidly and more strongly than usual; to throb; to bound with emotion or exertion; to pulsate violently; to flutter; -- said specifically of the heart when its action is abnormal, as from excitement.

cause to throb or beat rapidly; "Her violent feelings palpitated the young woman's heart"

beat rapidly; "His heart palpitated"

shake with fast, tremulous movements; "His nostrils palpitated"