Heart Attack is the third extended play by South Korean girl group AOA, released on June 22, 2015 by FNC Entertainment.

The song "Heart Attack" was written and composed by Brave Brothers.

[1][2][3] AOA started their Korean promotions with a showcase on June 22 at AX Korea.

[4] On June 17, 2015, it was revealed that AOA would release a Japanese and Chinese version of "Heart Attack".

[5][6][7] The Japanese version was released in Japan as a single on July 29, 2015 and AOA filmed a separate music video for it.