Rock icon Carlos Santana fainted on stage in the middle of a performance in Michigan on Tuesday night, according to reports from the scene.
Although his status is currently unknown, video of him shaking the hand of a crowd showed him leaving the stage on a stretcher at the Pine Knob Music Theater outside Detroit.
Santana, who turns 75 at the end of this month, was asked to pray as fans were told to leave.
Santana, considered one of the greatest and most creative guitarists of all time, had to postpone some shows in December last year for what was then referred to as an "unscheduled heart procedure".
He later described the sensation to the Las Vegas Review-Journal, saying he had a 94 percent blockage in one of his arteries.
"I felt like an elephant was sitting on my chest," he said.
After taking the stage again in January, Santana was forced to postpone additional performances in February because he and other band members contracted COVID-19 infections.