That's an arrhythmia, so its not anatomical, which is good.
I am glad you are feeling better.
I do think since you do have a history you should tell your friend not to behave that way. As you could potentially go into and arrhythmia ( although, unlikely)
Glad you feel better!
No you have an underlying cardiac issues, if not than unlikely. Your thoracic cage is there to protect you from things like that.
So unless he broke a rib or your sternun, I will go with a hard no.
Obviously, if you have cardiac issues or respiratory issues, than its a different story.