From your first link: "However, exactly what these findings mean for patients' heart health in the long term is unclear, the authors said. The heart abnormalities seen in the study occasionally occur with other respiratory diseases such as influenza and may be temporary"

News has a motivation to sensationalize, i.e. only time will tell if this was a lot of panic over nothing or if 20% of the people who caught COVID will drop dead over the next 10 years.

We will see when we have time to look back and this virus has infected a much larger and more uniform population. One paper is only one paper. It shifts my priors upwards as to whether this is the case, but it doesn't set them to 1.