Update Numer Zwei
I talked to my dad earlier today. He's at home now, finally getting some needed rest. He said he felt instantly better as soon as the pacemaker was turned on. His headache and the tightness in his chest went away. He actually moved himself from the operating table onto the gurney, and then told them they could just take the gurney and he would walk to his room. So he's doing perfectly fine. He wanted me to thank all of you for thinking about him, and wanted me to assure you that he is feeling great and will soon be completely back to normal.
So thank all of you again. Now hopefully my mom and I can get some sleep too.