if you have time you might find this previous post I did interesting, where I discussed drones being used to help specifically when someone has a heart attack :)
researchers have found that drones outperform ambulances by an average of 16 mins when trying to bring life-saving help! read more: https://steemit.com/technology/@doitvoluntarily/new-study-investigates-the-ability-of-drones-to-help-heart-attack-patients