The function calls the specific Interrupt Service Routine (ISR) associated with that vector.
The function is a low-level internal Windows kernel routine responsible for processing hardware interrupts, specifically within the I/O Virtualization (IVT) or IOMMU (Input-Output Memory Management Unit) framework. ivthandleinterrupt
If you see ivthandleinterrupt in a panic log, it usually means: The function calls the specific Interrupt Service Routine