It was later certified double platinum by the Recording Industry Association of America (RIAA), having sold over two million copies in the United States. The song sold 215,000 copies in the US in its first week, her best sales week for a song download, and peaked at number 10 on the US Billboard Hot 100, becoming Lovato's second solo top-ten single in the country.
Music critics mostly complimented the lyrical content and Lovato's vocal range.
"Heart Attack" is an electropop song that employs cardiac motifs to represent the fear of falling in love. The song was produced by Mitch Allan, and Jason Evigan of "The Suspex", who co-wrote the song along with Lovato, Sean Douglas, Nikki Williams, and Aaron Phillips. The song was released on February 25, 2013, as the lead single from her fourth studio album, Demi (2013). Escucha Heart Attack de Demi Lovato, con 3,605,503 shazams, aparece en las listas de reproducción Breakup Songs Essentials y Pop Hits: 2013 de Apple Music. "Heart Attack" is a song by American singer Demi Lovato.