A cop who was racing to help Jim Irsay during the NFL owner's medical scare last month got a bit of an assist from Taylor Swift ... 'cause new police video, obtained by TMZ Sports, shows the officer was blaring the popstar's music as he rushed to the emergency.
The scene was captured on a Carmel Police Dept. dash camera at around 4:30 AM back on Dec. 8 ... just after cops say someone had called 911 to report Irsay might have suffered a possible overdose at his Indiana home.