idioms

light heart (happy and free from care or worry) She left for Washington with a light heart. I paid off my debts, and I can sleep with a light heart tonight.     envocabulary.com

in a heartbeat  US informal (very quickly, without any delay) Call me when you need me, and I’ll be here in a heartbeat. If I had the money, I would leave this country in a heartbeat.     envocabulary.com

heavy heart (feeling of sadness)  With a heavy heart, he turned to say goodbye.  She walked out of the room with a heavy heart.     envocabulary.com

heart stand still (be very frightened or worried) When the lion came toward me, my heart stood still. The roller coaster makes my heart stand still.   envocabulary.com

heart skip a beat (suddenly feel excited or frightened, which causes the heart to beat faster) My heart skips a beat every time my wife calls me. When I learned I had won two tickets to Hawaii, my heart missed a beat.     envocabulary.com