Cardiac arrest because of what? The Baden team said it was due to “Mechanical asphyxiation.” Look up the term. I think their description is accurate.
A number of people online on other sites have self-identified as MDs and coroners and said that it is almost impossible to tell post mortem, what exactly caused cardiac arrest, in a wide variety (they listed some) of circumstances.
I have over 80 tabs open and I'm not going to go looking.