Deadly heart attacks are more common on a Monday

I've read a bit into this subject before; Matthew Walker's book 'Why We Sleep'[0] discusses it at length.

A lot of it boils down to blood pressure. High blood pressure is a serious contributing factor to cardiovascular incidents (as well as a slew of other negative health risks), and getting a good night's sleep will help keep blood pressure down. This is also why the amount of heart attacks are up around 24% after daylight savings[1]; an hour less sleep means higher blood pressure means higher risk of heart attack (relative to any other 'normal' day).

I can definitely see how the same logic could apply to Mondays. Less sleep, more stress = higher blood pressure = higher risk of heart attacks.

[0] https://www.goodreads.com/book/show/34466963-why-we-sleep

[1] https://pubmed.ncbi.nlm.nih.gov/18971502/

The important consideration here is that these people are on the cusp of death already, and this is typically just the straw that broke the camel's back. You don't get a heart attack from one bad night of sleep, of course, unless there are significant underlying conditions.

This is a very important thing to consider when interpreting this statistic.

"Heart attack rates go up 24% after daylight savings changes" is not the same thing as "There are 24% more heart attacks due to daylight savings". You can't really know the weight of magnitude vs distribution without actually stopping daylight savings.