The cardiologist said he doesn't hear or feel that Mikey's heart is working extra hard, and Mikey's weight gain is great ("growing like gang busters" was his term; he was very impressed with his length). Basically, there is no evidence that the hole is causing any problems or symptoms. The EKG was normal, and his BP was good, too.
We can't make an appointment with the cranio-facial specialist until Monday because the scheduler is on vacation. We will continue with the chiropractor next week so that we're at least doing something.
Mikey weighed 9 lbs. 1 oz. and measured 20 inches (with their highly inaccurate method).