My brother's best friend in college dropped dead on the tennis court next to their dorm. Several years ago my sister-in-law was found collapsed on the sun porch off of the kitchen and died hours later of an aneurysm. It was the same kind of aneurysm my wife survived several years before it happened to her sister. So yes, these things happened before Corvid-19 or the so called vaccine.
My mother died of a stroke too.
First it was Covid-19 fear porn. Then there was Covid-19 vaccine fear porn.
I got tired of each of them after about a week or two after I first heard it.
Nobody is suggesting that these types of occurrences never happened prior to Covid.
That said, the stroke & heart attack death rate among very young people is astronomical over the past 6-10 months.