In the old days, meaning prior to about five years ago, the only cause of heart problems in a previously healthy 18 year old was cocaine use.
The most common cause of cardiovascular death in males under 30 is hypertrophic cardiomyopathy. Your state is incorrect.
Normally, my first thought in this aspect is Marfan Syndrome, but he doesn’t look the type.
“In the old days, meaning prior to about five years ago, the only cause of heart problems in a previously healthy 18 year old was cocaine use.”
It started long before 2021. Studies were following the trend even in 2010.