I seriously doubt you know what an aneurism is. If you did you would not have written what you did.If a person has an aneurysm, damaged trachea, weak heart, or a brain issue, I seriously doubt they would be attacking you in a street encounter in the first place.
And nothing here has anything to do with self defence. In training I have done the same. It proves nothing.Again, I've applied numerous choke holds in my time within Bjj against a wide variety of people. In some cases, people were actually choked out because they didn't realize that the choke had been put on before its too late. To date, there's been no deaths, and no one has suffered any long term brain damage.
Poor advice I'm afraid. You will be unlikely to find anyone who teaches self defence saying that.In the end though, its better to be judged by 9 than carried by 6.