A study in San Francisco has found that 17 per cent of deaths ascribed to cardiac arrest were actually caused by drug overdose, most commonly opioids
Source:
https://www.newscientist.com/article/2251376-fatal-cardiac-arrests-could-be-hiding-opioid-overdose-deaths-in-the-us/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home