COVID19 can and does indeed trigger heart attacks as well as strokes. Severe internal inflammation and blood clots can do that.
That of course doesn’t mean all heart attacks and strokes are caused by COVID19...and car accidents and poisonings would have no connection.
I think this Bat Flu is a multiplier virus. If you have comorbidities or have the actual flu it can get serious. Just COVID itself is less deadly than the ordinary flu.