You're right
Hi,
You're right that she had an existing medical problem. It was an error on my part not to mention it. Here's what the NYT says:
The lawsuit filed last week on behalf of the teenager referred to autopsy and medical examiner reports that said she had died of cardiac arrhythmia due to caffeine toxicity that had exacerbated an existing heart problem. The report also showed that the teenager had Ehlers-Danlos syndrome, which can affect the bodys connective tissue, including blood vessels. A lawyer for her family, Kevin Goldberg, said that the 14-year-old had been aware she had an underlying heart condition but added that her doctors had not told her to restrict her physical activities or her caffeine use.
Laura