Zoe,
Hi! Since you've HELPED others from choking-to-death by doing the Heimlich Maneuver, then you'll probably be interested in the Heart Attack Technique, that's written about in Parts 1 & 2 of the following Newsletter and is shown in Part 3. Here's a link to this 3 - part Newsletter.
I've used this Technique SUCCESSFULLY on myself, when I had a minor Heart Attack in the past and have HELPED several men STOP their Heart Attacks!! I've even taught a couple of Paramedics this Heart Attack Technique and eventhough it's NOT standard training for a Paramedic, each of them told me, that they would use it, because it WORKS and could possibly SAVE someone's life!!