Jim,
Very sorry that you're going through this right now. I'll be praying that you'll get well soon. Recovering from a joint replacement is hard enough without adding a heart attack recovery on top of it. I completely agree that someone was looking out for you considering the timing.
He'll get a two-fer/double dose on the physical therapy: cardiac recovery and hip installation which will be complicated by the extended inactivity from the heart attack treatment/aftercare.