Having been through this several times with my mom ... ONLY GO FOR THE BEST. Also, you don't want a cath anywhere that they don't have a full cardiothoracic surgical suite.
If at all possible, try to get booked into the Cath Lab at
UPenn/Presbyterian.
I recommend Dr. Bradford Lin if you can specify. Awesome man. Phenomenal doctor. He's done my mom's cath twice (out of a total of three or four, we've lost count).
The only downside is that they charge through the nose for parking, but for Philadelphia, it's easy to get to, the campus is a kind of enclosed courtyard so it's hardly like being in the city. The staff were courteous, the facility nice, and everything is top of the line, state of the art, and other encouraging words.