Not sure about stroke+neurocritical combined, bit there are few other options:
Combined fellowship of interventional and neurocritical care: Three years duration. Pre-requisite is completion of a neurology residency. In the first two years the fellow will obtain a certificate of neurocritical care with special qualification in diagnostic neurointervention. The third year focuses on interventional procedures.
Combined fellowship of interventional and vascular neurology: Three years duration. Pre-requisite is completion of a neurology residency. In the first two years the fellow will obtain a certificate of vascular neurology with special qualification in diagnostic neurointervention and the third year focuses on interventional procedures.
http://www.mcw.edu/neurointerventional/TrainingProgram.htm