Kiss lead singer and guitarist Paul Stanley was forced to bow out of a California concert because of heart problems before the show.
Bandmates Gene Simmons, Tommy Thayer and Eric Singer played the Friday night gig at Soboba Casino, about 145km east of Los Angeles, as Stanley was taken to the hospital.
"During soundcheck yesterday, my heart spontaneously jumped to 190-plus beats a minute where it stayed for over an hour, necessitating paramedics to start an IV and give me a shot to momentarily stop my heart and get it into a normal pattern," Stanley said on his website.
It was Kiss' first appearance as a trio, according to the band's website.
The 55-year-old Stanley, born Stanley Eisen, released a solo album, Live to Win, last year.