I've smoked cigarettes the day before surgery?

II have a bad habbit of smoking, and I'm scheduled for a right to left cardiac cateterization tomorrow afternoon, and I've already smoked cigarettes all day today. I have a congenital heart defect, which I was born with, and the surgeon is plugging the hole in my heart tomorrow. The surgeon said that smoking didn't cause this because I was born with it, but I know it doesn't help it either. I'm quitting right after I get out of the hospital overnight. Anyways, the surgeon never said I had to quit anytime or stop smoking before surgery, so I was wondering if I'm going to be okay under full anesthesia? I'm 25 year old male, and I'm one of their younger heart patients. The surgeon knows I smoke, and the brochures that the hospital sent out didn't say anything about stopping smoking the day before or a week before. The brochure just said not to eat after 12 midnight.