At the top of the article :

Editor’s Note: Readers are alerted that the conclusions of this article are subject to criticisms that are being considered by the Editors. A further editorial response will follow once all parties have been given an opportunity to respond in full.

This study is written by biased authors [1], and they're simply measuring the emergency calls for cardiovascular events in different age groups over time. They literally don't know if the affected individuals were even vaccinated or if they had covid.

We really can't infer that the risk from vaccination is higher from this study.

[1] https://concerneddoctors.org/testimony-of-retsef-levi/

> this study in Nature

No, that's been published in Scientific Reports not Nature. Scientific Reports has a vastly higher acceptance rate, engages in pay to play, and published a picture of Donald Trump hidden in baboon feces. You're relying on junk science.