Is there a cardiologist on board? (few quick notes)

On the flight to Denver, I spoke with an ob nurse about breast cancer, as well as when I was in Denver. A gentleman and I were waiting to board, and we spoke about my bc and his girlfriend's cervical cancer. When we were starting to descend into WA DC, the flight attendant got online and warned us about the turbulence. She let us know if we felt better about it, we could kneel down and hug our seats to make us feel better. Uh, thanks.

On the way home, from WA DC to Denver, we had a medical problem with a passenger. As soon as we got in the air and sort of leveled off, the guy headed for the bathroom and didn't return. After about 20 minutes or so, someone let the flight attendant know and she went to check on him. She had to ask if there was a doctor or medical person on board and eventually someone went up as did a cardiologist when one was asked for. They had to get oxygen out, blood pressure cuff, and stethascope. The guy made it out of the bathroom and had to lay down in the front part of the plane by the door. We were asked for blankets and all the pillows we could spare to make him more comfortable. Seats were rearranged so that the medical personnel could sit by him in a seat in case he had any more problems. I thought for a while we might have to divert and land elsewhere while he was taken care of. He managed to make it to Denver where there were paramedics waiting to take care of him.