possitioning
I would rather put in supine possition and elevate legs. That'll keep abdomen from streching and bring a little perfusion to vital organs. Or how about left latteral?
Heart condition
If I were you I would actually ask a doctor. If your condition is serious and can be easiliy comprimised, I would think twice. But If dealing with stressful situations and traumatic situations don't bother you too much, try it out. You need to figure out where you stand by...
crash course
I took a crach course at UCLA, it cost $700. Honestly, the instructors are te best, none of my professors in my other classes even come close to teaching as well as the instructors at UCLA. http://www.cpc.mednet.ucla.edu/SRRS/ is the website if your interested. I highly recommend...