[tz] Daylight saving and heart attacks

[Paul Eggert]

On 6/24/19 10:40 AM, Arthur David Olson wrote:
>
> https://www.youtube.com/watch?v=XZGs5Im9f8Q
>
That cites a primary study[1] that spawned a bunch of work, recently 
reviewed by researchers in Italy. Their bottom line is that "These 
results support the presence of an association between DST and a modest 
increase of AMI ["heart attack"] occurrence, especially for the spring 
shift, and with no definite gender specific differences."[2] and "The 
risks of AMI increases modestly but significantly after DST transitions"[3].

To my mind the more-concerning health effects of daylight-saving time 
occur not during the twice-yearly transitions, but during the time that 
DST is in effect - which is the whole year when a location uses 
"permanent DST". Unfortunately these effects have not been studied as 
much, although experts are warning us that these effects are worrisomely 
negative (see, e.g., [4]).

[1] Sandhu A, Seth M, Gurm HS. Daylight savings time and myocardial 
infarction. Open Heart. 2014 Mar 28;1(1):e000019. 
https://dx.doi.org/10.1136/openhrt-2013-000019 
https://openheart.bmj.com/content/1/1/e000019

[2] Manfredini R, Fabbian F, De Giorgi A et al. Daylight saving time and 
myocardial infarction: should we be worried? A review of the evidence. 
Eur Rev Med Pharmacol Sci. 2018 Feb;22(3):750-755. 
https://dx.doi.org/10.26355/eurrev_201802_14306 
https://www.europeanreview.org/article/14306

[3] Manfredini R, Fabbian F, Cappadona R et al. Daylight Saving Time and 
Acute Myocardial Infarction: A Meta-Analysis. J Clin Med. 2019 Mar 
23;8(3). https://dx.doi.org/10.3390/jcm8030404 
https://www.mdpi.com/2077-0383/8/3/404

[4] Watson NF. Time to Show Leadership on the Daylight Saving Time 
Debate. J Clin Sleep Med. 2019 Jun 15;15(6):815-817. 
https://dx.doi.org/10.5664/jcsm.7822 
http://jcsm.aasm.org/ViewAbstract.aspx?pid=31589