Absolutely. Consider the fact that an AED only has one lead to work with, and it is able to recognize a couple different lethal arrhythmias in order to deliver

Absolutely. Consider the fact that an AED only has one lead to work with, and it is able to recognize a couple different lethal arrhythmias in order to deliver a shock (and more importantly, _not_ deliver a shock at any other time). To be clear, by "lead" here, I mean a pair of electrodes. A single electrode (like you might put on a watch) is useless.