True, but given that cardiovascular disease is one of the leading causes of death, I don't think that in this specific case it's negligible.

By far the bigger problem IMHO is not controlling by weight (at least, the article seems to hint that doing so might happpen in further research...), which is highly correlated both to cardiovascular disease and the chance of being on a restrictive diet plan. "Fat people more likely to have a heart attack, and also to be on a diet" doesn't have the same clickbaity ring to it.

Yeah, especially given we don't know what baseline is. Like, did 58 people die of a heart attack and 38 of them had intermittently fasted?

Without knowing what these numbers mean really hard to draw any conclusion. Also, somewhat irresponsible for eurekalert to publish something like this on an unreleased study.